CA2109701C - Low cross talk electrical connector system - Google Patents
Low cross talk electrical connector systemInfo
- Publication number
- CA2109701C CA2109701C CA002109701A CA2109701A CA2109701C CA 2109701 C CA2109701 C CA 2109701C CA 002109701 A CA002109701 A CA 002109701A CA 2109701 A CA2109701 A CA 2109701A CA 2109701 C CA2109701 C CA 2109701C
- Authority
- CA
- Canada
- Prior art keywords
- pair
- conductor
- connector
- conductors
- adjacent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0228—Compensation of cross-talk by a mutually correlated lay-out of printed circuit traces, e.g. for compensation of cross-talk in mounted connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
- H01R13/6461—Means for preventing cross-talk
- H01R13/6467—Means for preventing cross-talk by cross-over of signal conductors
- H01R13/6469—Means for preventing cross-talk by cross-over of signal conductors on substrates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/32—Reducing cross-talk, e.g. by compensating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/60—Contacts spaced along planar side wall transverse to longitudinal axis of engagement
- H01R24/62—Sliding engagements with one side only, e.g. modular jack coupling devices
- H01R24/64—Sliding engagements with one side only, e.g. modular jack coupling devices for high frequency, e.g. RJ 45
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09218—Conductive traces
- H05K2201/09236—Parallel layout
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09218—Conductive traces
- H05K2201/09245—Crossing layout
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10189—Non-printed connector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S439/00—Electrical connectors
- Y10S439/941—Crosstalk suppression
Abstract
There is provided an apparatus for reducing pair to pair cross talk which arises in electrical connectors (10, 11) due to closely spaced elongated parallel conductors (16, 18, 22, 24). The cross talk which occurs within the connector (10, 11) is reduced by modifying certain circuit paths either inside or outside of the connector (10, 11) so that each conductor of a first pair (T1, R1) which is parallel to and cross talking with an adjacent conductor of a second pair (T2, R2) in the connector (10, 11) is relo-cated adjacent and parallel to the other conductor of the second pair (T2, R2) over a predetermined distance. It is preferred that the relocation of the circuit paths occur on a circuit board (32) which is attached to the connector (10, 11).
Description
~V~) 93/19~00 PCr/l.!S93/025~7 -1 - 21 097~1 Description Low Cross Talk Electrical Connector SYstem Technical Field This invention relates to reducing electrical signal inte~ference which arises due to parallel contacts in electrical connectors. More particularly it relates to the partial cancellation of pair to pair interference or cros~
talk induced into a signal carrying cable pair by FCC type modular jacks and plugs, or other input/output signal connectors.
Backqround Art The United States Federal Communications Commission (FCC) has adopted certain architectural standards with respect to electrical connectors utilized in the telecommunication industry so as to provide intermatability. The connectors most commonly utilized are FCC type modular plugs and jacks. The plug is commonly terminated to a plurality of wires which may be connected to a telephone handset or other communications device. Th~
corresponding jack is commonly mounted to a panel or a printed circuit board which in turn is connected to a telecommunications network. A typical FCC jack is described in United States Patent No. 4,648,478.
Often a plurality of jacks, such as six, are placed adjacent to one another in a housing, with the printed circuit board forming the backside of the housing. Each jack includes a plurality of elongated contacts which are closely spaced and parallel to one another. A typical jack having four adjacent and parallel contacts is shown in Figure 1. Jack 10 includes electrical contacts 12 which are housed in the hollow portion of the jack and include two pairs of parallel contacts. Each pair 14 and 20 form separate communication circuits, each of which will be WO93/19~0 PCT/US93/02~7 referred to herein sometimes as a signal pair. Pair 14 includes conductor 16 and conductor 18 and pair 20 includes conductor 22 and conductor 24. Each of these contacts extend through the backside 26 of jack 10 and are soldered to circuit board 28. The lengths of the contacts running through the jack are predetermined by connector design considerations.
When an electrical signal of a given frequency is applied to a pair of conductors, unequal portions of signal energy are transmitted to the individual conductors of an adjacent pair by each conductor of the signal pair. This coupling is primarily due to capacitive and inductive coupling between adjacent conductors being substantially higher than the couplings of the other conductor of the signal pair resulting in a phenomenon known as cross talk.
This phenomenon is further exaggerated when both conductors of the signal pair are placed adjacent to and outside of opposing conductors of the other signal pair. For ease of discussion~adjacent conductors which are not a signa~ pair in themselves are referred to herein as a cross-talking pair. For example conductors 16 and 22 form a cross-talking pair. The extent of the cross talk is governed by such parameters as the space between the adjacent conductors, the dielectric constant of the matter between such conductors and the distance in which such conductors are closely spaced and parallel to one another.
Furthermore, the extent of the cross talk is a function of the frequency of the signal on either or both of the signal pairs. Cross talk increases logarithmically as frequency of the signal increases and is commonly expressed as ten times log of the ratio of the cross talk energy divided by the signal energy (decibels or dB).
As FCC modular plugs and jacks are utilized more and more in high frequency data and communication applications, cross talk which arises in the adjacent and parallel contacts of the jack, and to a lesser degree in the plug, has become a problem in the industry. Furthermore, because WO93/19500 PCT/~IS93/02~7 ~ 3 ~ 2 1 0 9 7 0 1 .
of miniaturization as well as FCC rules, these jacks are quite small resulting in a very close spacing of the contacts which exacerbates the problem.
A current industry standard permits no mo~e than -46 dB of near end cross talk at 16 Megahertz (MHz). Currently it is anticipated that the standard for near end cross talk will be shortly reduced to less than -56 dB. Using good prior art désign techniques, such as that shown in Figures 3 and 4, one is able to reach -50 dB of cross talk at 16 MHz utilizing commonly available modular plug and jack ~ combination. The current thinking is that the routings of the individual circuit paths for each signa; pair on the circuit board should generally be parallel to each other and the signal pairs should be separated from one another as much as possible and be non-parallel. That type of design technique on the circuit board does nothing to reduce the cross talk which arises within the connector which is attached to the circuit board but simply, at best, maintains the status quo.
Disclosure of Invention In accordance with one form of this invention there is provided a low cross talk electrical signal transmission system including an electrical connection apparatus having at least first, second, third and fourth conductors with the first and second conductors forming a first signal pair and the third and fourth conductors forming a second signal pair. The first and second pairs are adjacent and parallel to one another through a major portion of the connector apparatus. The third conductor is adjacent and parallel to the first conductor and the fourth conductor is adjacent and parallel to the second conductor through at least a portion of the connection apparatus forming a first path length thereby inducing cross talk from one signal pair to - 35 another signal pair when signals are applied to either one of the said pairs. The third conductor is then routed adjacent to and parallel to the second conductor and away WO93/1~00 PCT/US93~02557 ~ 4 ~ 21 0~7 ~
from the first conductor and the fourth conductor is then routed adjacent and parallel to the first conductor and away from the second conductor through another portion of the connector apparatus forming a second path length and thereby cancelling a substantial amount of cross talk which was induced in the first portion of the connector apparatus.
It is preferred that the connector apparatus include a connector housing and a substrate with the first path length being located inside the connector housing and the second path length being located on the substrate. It is further preferred tha~ the substrate be a circuit board.
Quite surprisingly, it has been found that cross talk is substantially reduced when, rather than separating the pairs of conductors on the substrate which would isolate the pairs, the circuit paths of the adjacent conductors of each pair which are parallel and adjacent within the connector and which cause the cross talk are reversed and made parallel to and adjacent to the opposite conductors in a pair preferably for a length similar to the length of the contacts within the connector depending on electrical field strength effects due to geometry of the conductor relationships and dielectric constant of the material surrounding them. This crossing of the conductors results in a cancellation of a substantial portion of the cross talk which was induced within the connector.
The spacing between adjacent conductors on the substrate may be adjusted depending on the differences between the dielectric constants within the connector and the dielectric constants on the substrate and space restrictions on the circuit substrate which may also cause physical path length to be reduced or lengthened.
In another form of this invention where two pairs of signal paths are adjacent to one another for the first path length the positions of two of the conductors of one pair are reversed in the second path length so that cross talk is cancelled.
WO93/19500 PCT/llS93/02~7 .
The invention thus provides a low cross talk electrical signal transmission system. The invention further provides an apparatus for cancelling cross talk which arises within an electrical connector having closely spaced parallel contacts, and provides an electrical connector apparatus which is able to equal or exceed pair to pair cross talk standards.
Brief Description of Drawinqs The subject matter which is regarded as the invention is set forth in~the appended claims. The invention itself, however, together with further objects and advantages thereof may be better understood in reference to the following description taken in conjunction with the accompanying drawings in which:
Figure 1 is a pictorial view sho~iing portions of a typical FCC modular jack and its associated plug and illustrating the contacts;
Figure 2 is a side elevational view of the jack of Figure 1 showing the jack connected to a circuit board.
Figure 3 is a side view showing the conductive tracings of a portion of the circuit board of Figure 2 using prior art design techniques;
Figure 4 is a simplified top view of the apparatus of Figure 2 showing the contacts in the jack and the tracing on the circuit board using prior art design techniques with the circuit board having been rotated so degrees for ease of understanding;
Figure 5 is a pictorial view of a typical connector having six modular jacks connected thereto in which the invention may be utilized.
Figure 6 is a pictorial view of the other side of the connector of Figure 5.
Figure 7 is a simplified top view of the apparatus of 35 Figure 2 showing the contacts in the jack and the tracings on the circuit board in accordance-with one embodiment of WO93/19500 PCT/~'S93/025~7 - 6 ~ ~l 097 Ql the invention with the circuit board having been rotated 9o degrees for ease of understanding;
Figure 8 is a side elevational view of a circuit board illustrating one embodiment of the invention wherein six modular jacks are utilized;
Figure 9 is a side elevational view of a portion of the circuit board of Figure 8 but illustrating two adjacent pairs of signal paths;
Figure 10 is a graph comparing near end cross talk readings utilizing the six plugs and tracings shown in Figures 5 and 8 as compared to the prior art shown in Figure 3;
Figure 11 is a pictorial view showing a jumper which may be used between a jack and a plug for another embodiment of the invention;
Figure 12 is a top view of Figure 11, with portions removed, illustrating the configuration of the conductors within the cable portion which provides cross talk reduction;
Figure 13 is a pictorial view of a connector apparatus with portions removed for illustrative purposes showing another embodiment of the invention;
Figure 14 is a pictorial view showing an array of jack contacts within a jack illustrating yet another embodiment of the invention;
Figure 15 is a simplified top view showing an alternative embodiment to that of Figure 7.
Best Mode for Carryinq out the Invention Referring now to Figures 1 through 15, there is provided modular jack 10 including an array 12 of closely spaced parallel electrical contacts. In this embodiment there are only two signal pairs, namely pair 14 and pair 20. Signal pair 14 includes the central two conductors 16 and 18 of the array and signal pair 20 includes conductors 22 and 24 which flank signal pair 14. Conductors 16 and 18 are also referred to as tip (T) and ring (R) conductors of WO 93/19500~ PCr/~lS93/02~, - 7 210970~
the signal pair 14 and conductors 22 and 24 form the tip (T) and ring (R) conductors of signal pair 20. For ease of understanding, the entire circuit path which includes contacts, conductors and circuit board tracings are sometimes referred to herein as (T) or (R). Although only two pairs of conductors are shown in Figure 1 for ease of illustration, often three or four pairs of conductors are provided within the same jack. The associated modular plug-11 having closely spaced and parallel contacts 13, 15, 17 and 19 and conductors 21, 23, 25, and 27 is also shown in Figure 1. Because of the spacing requirements of the contacts and conductors within the jack and plug, a substantial amount of pair to pair cross talk is introduced. Primarily there is substantial cross talk between conductor 18 and conductor 24 (one cross talking pair) and between conductor 16 and conductor 22 (another cross talking pair). In addition the adjacent contacts and conductors of each signal pair in the plug 11 introduces cross talk.
The tails of contacts 12 are soldered to a substrate such as a circuit board 30, in the case of a prior art design as shown in Figure 3, and to circuit board 32 as shown in Figure 8 using the design of one embodiment of the present invention. In using the prior art design, it was believed that the tracings on the circuit board, which continues the circuit paths of the contacts, should be structured so that cross talk does not increase beyond what occurred within the connector body. Thus tracing 34 forming part of (R2) was placed adjacen. and parallel to 30 tracing 36 (T2), and tracing 38 (T1) and tracing 40 (T2) were placed adjacent and parallel to one another. Thus the two pairs were spaced apart from one another thereby having little if any impact on the cross talk which arose within the connector body.
The cross talk characteristics for a typical prior art design as shown in Figure 3 is illustrated by line 43 in Figure 10 which shows the cross talk measured in -dB over a WO93/19500 PCT/~'S93/025~7 range of frequencies. The cross talk was measured by applying a signal on pair 14 and measuring resulting induced portion of the signal on pair 20. At a frequency of 16 MHz, which is a standard frequency for measuring cross talk, the cross talk was -50 db at 16 MHz. This level of cross talk is unacceptable for many applications.
Applicant has found that the cross talk induced within the plug ll and jack lO connectors because of the closely spaced parallel conductors may be substantially reduced by changing the tracings on the circuit board so that rather than isolating the signal pairs, each cross talking conductor path in one signal pair is actually placed adjacent to the opposite conductive path of the other signal pair and the cross talk is substantially cancelled by cross talk energy which is effectively 180 degrees out of phase with the cross talk energy induced by the plug and jack connectors. The conductive paths of one signal pair is referred to in the drawings as Tl and Rl and the second signal pair~is referred to as T2 and R2. Inside the connector bodies lO and ll Tl is adjacent to R2 (cross talking pair) and T2 is adjacent to Rl (cross talking pair). By placing T2 adjacent to Tl and away from Rl, and R2 adjacent to Rl and away from Tl on the circuit board 32 as shown in Figures 7 and 9, a substantial amount of the cross talk which occurred within connector bodies is cancelled. This is further illustrated in Figure 9 where tracing 42 which is R2 runs adjacent to tracing 44 which is Rl and away from tracing 48 which is Tl, and tracing 46 which is T2 runs very close to tracing 48 which is Tl and away from tracing 44 which is Rl. In Figure 9, the open line portion 46' of tracing 46 illustrates that a portion is running on the bottom side of the circuit board 32.
Referring now to the graph of Figure lO, lines 50, 52, 54, 56, 58 and 60 illustrate the improvement in cross talk which is achieved utilizing the circuit board tracing patterns 50', 52', 54' 56' and 60' on circuit board 32 shown in Figure 8. As can be seen in each of the tracing ~093/19500 PCT/~'S93/025~7 -- 9 ~ 0 1 patterns on circuit board 32, circuit path of T2, which was adjacent to Rl in each connector 10, is placed adjacent to the circuit path T1, and the circuit path of R2, which was adjacent to T1 in each connector, is placed adjacent to the circuit path R1. Thus it can be seen that reductions of cross talk ranging from -10 dB to -25 dB at 16 MHz are achieved utilizing the invention. Since dB is measured in logarithmic terms, each 10 dB reduction results in a ten fold improvement.
Referring now more particularly to Figures 11 and 12, there is shown an alternative embodiment of the invention.
Rather than provide modifications to what WaS heretofore thought to be proper routing techniques on a circuit board by reversing and closely spacing the cross talking conductors adjacent to one another, a jumper 62 is provided which includes an FCC modular jack 64 and an FCC modular plug 66. A substrate such as a flat cable is connected between the jack 64 and plug 66. Cable 68 connects the jack 64 to plug 66. Plug 11 is connected to jack 64, and plug 66 is connected to jack 10 thereby forming a jumper between plug 11 and jack 10. In this embodiment the prior art circuit board shown in Figure 3 would be used with jack 10 .
The conductors within cable 68 are illustrated in Figure 12. Again the portions of the R2 and T2 paths are reversed in the cable so as to cancel the cross talk induced in plugs 11 and 66 and jacks 10 and 64. The length L of the reversed conductors should approximate the lengths of the contacts and conductor in the plugs and jacks, again depending on the dielectric constants and the spacing. It has been found in this embodiment as well as the other embodiments of this invention that by reversing the cross-talking paths a substantial cross talk reduction is achieved. For maximum cross talk cancellation, the length of the jumper and spacing between conductors should be adjusted and held as closely as possible to design dimensions.
WO93/19500 PCT/~lS93tO2~57 21 ~9701 Figure 13 shows still another embodiment of the invention whereby rather than using a jumper with a cable to reduce cross talk arising in a jack and plug, a connector module 70 is utilized having a substrate such as a circuit board within the module and which utilizes the same crossing of the R2 and T2 paths to effectuate the reduction of cross talk.
The devices of Figures 11 and 13 may be utilized in retrofit applications so that new circuit boards need not be manufactured.
Figure 14 shows still another embodiment of the invention whereby the ,conductor array 72 within jack housing 10 is modified by again crossing T2 and R2 paths in the same fashion as shown in-Figures 7, 12 and 13. In this way, circuit board 28 need not be modified. That is, the prior art circuit board shown in Figure 3 may be utilized and one may still achieve a cancelling of cross talk which is both induced and cancelled within connector 10.
Figure 15 shows yet another embodiment of the invention where each pair of contacts 74 (T1, R1) and 76 (T2, R2) in connector 10 are adjacent to one another and thus most of the capacitive coupling or cross talk occurs between contact 78 and contact 80. Cross talk reduction is obtained by placing tracing 82 (T2) adjacent to tracing 84 (T1) on circuit board 86 and by placing tracing 88 (R2) away from tracing 84 (T2). In the embodiment of Figure 15, there is no need to reconfigure the T1, R1 circuit path on the circuit board.
From the foregoing description of the preferred embodiments of the invention, it will be apparent that many modifications may be made therein. It is to be understood that all such modifications are embodied in the accompanying claims which come within the true spirit and scope of this invention.
WO93/19500 PCT/~IS93/02557 Industrial APPlicability The invention is applicable to the telephone industry, and provides a technique for reducing cross talk arising in FCC type modular jacks and plugs and other signal connectors by taking advantage of the cross talk itself, that is, by reversing the position of the tip (T) and ring (R) conductors in adjacent pairs so that each conductor of a first pair which was originally cross talking with a conductor of the second pair is placed adjacent and parallel to the other conductor of the second pair and away from its origi~al conductor for a certain distance by changing the circuit paths either on a substrate such as a circuit board, in a jumper, or within the housing of the connector itself.
talk induced into a signal carrying cable pair by FCC type modular jacks and plugs, or other input/output signal connectors.
Backqround Art The United States Federal Communications Commission (FCC) has adopted certain architectural standards with respect to electrical connectors utilized in the telecommunication industry so as to provide intermatability. The connectors most commonly utilized are FCC type modular plugs and jacks. The plug is commonly terminated to a plurality of wires which may be connected to a telephone handset or other communications device. Th~
corresponding jack is commonly mounted to a panel or a printed circuit board which in turn is connected to a telecommunications network. A typical FCC jack is described in United States Patent No. 4,648,478.
Often a plurality of jacks, such as six, are placed adjacent to one another in a housing, with the printed circuit board forming the backside of the housing. Each jack includes a plurality of elongated contacts which are closely spaced and parallel to one another. A typical jack having four adjacent and parallel contacts is shown in Figure 1. Jack 10 includes electrical contacts 12 which are housed in the hollow portion of the jack and include two pairs of parallel contacts. Each pair 14 and 20 form separate communication circuits, each of which will be WO93/19~0 PCT/US93/02~7 referred to herein sometimes as a signal pair. Pair 14 includes conductor 16 and conductor 18 and pair 20 includes conductor 22 and conductor 24. Each of these contacts extend through the backside 26 of jack 10 and are soldered to circuit board 28. The lengths of the contacts running through the jack are predetermined by connector design considerations.
When an electrical signal of a given frequency is applied to a pair of conductors, unequal portions of signal energy are transmitted to the individual conductors of an adjacent pair by each conductor of the signal pair. This coupling is primarily due to capacitive and inductive coupling between adjacent conductors being substantially higher than the couplings of the other conductor of the signal pair resulting in a phenomenon known as cross talk.
This phenomenon is further exaggerated when both conductors of the signal pair are placed adjacent to and outside of opposing conductors of the other signal pair. For ease of discussion~adjacent conductors which are not a signa~ pair in themselves are referred to herein as a cross-talking pair. For example conductors 16 and 22 form a cross-talking pair. The extent of the cross talk is governed by such parameters as the space between the adjacent conductors, the dielectric constant of the matter between such conductors and the distance in which such conductors are closely spaced and parallel to one another.
Furthermore, the extent of the cross talk is a function of the frequency of the signal on either or both of the signal pairs. Cross talk increases logarithmically as frequency of the signal increases and is commonly expressed as ten times log of the ratio of the cross talk energy divided by the signal energy (decibels or dB).
As FCC modular plugs and jacks are utilized more and more in high frequency data and communication applications, cross talk which arises in the adjacent and parallel contacts of the jack, and to a lesser degree in the plug, has become a problem in the industry. Furthermore, because WO93/19500 PCT/~IS93/02~7 ~ 3 ~ 2 1 0 9 7 0 1 .
of miniaturization as well as FCC rules, these jacks are quite small resulting in a very close spacing of the contacts which exacerbates the problem.
A current industry standard permits no mo~e than -46 dB of near end cross talk at 16 Megahertz (MHz). Currently it is anticipated that the standard for near end cross talk will be shortly reduced to less than -56 dB. Using good prior art désign techniques, such as that shown in Figures 3 and 4, one is able to reach -50 dB of cross talk at 16 MHz utilizing commonly available modular plug and jack ~ combination. The current thinking is that the routings of the individual circuit paths for each signa; pair on the circuit board should generally be parallel to each other and the signal pairs should be separated from one another as much as possible and be non-parallel. That type of design technique on the circuit board does nothing to reduce the cross talk which arises within the connector which is attached to the circuit board but simply, at best, maintains the status quo.
Disclosure of Invention In accordance with one form of this invention there is provided a low cross talk electrical signal transmission system including an electrical connection apparatus having at least first, second, third and fourth conductors with the first and second conductors forming a first signal pair and the third and fourth conductors forming a second signal pair. The first and second pairs are adjacent and parallel to one another through a major portion of the connector apparatus. The third conductor is adjacent and parallel to the first conductor and the fourth conductor is adjacent and parallel to the second conductor through at least a portion of the connection apparatus forming a first path length thereby inducing cross talk from one signal pair to - 35 another signal pair when signals are applied to either one of the said pairs. The third conductor is then routed adjacent to and parallel to the second conductor and away WO93/1~00 PCT/US93~02557 ~ 4 ~ 21 0~7 ~
from the first conductor and the fourth conductor is then routed adjacent and parallel to the first conductor and away from the second conductor through another portion of the connector apparatus forming a second path length and thereby cancelling a substantial amount of cross talk which was induced in the first portion of the connector apparatus.
It is preferred that the connector apparatus include a connector housing and a substrate with the first path length being located inside the connector housing and the second path length being located on the substrate. It is further preferred tha~ the substrate be a circuit board.
Quite surprisingly, it has been found that cross talk is substantially reduced when, rather than separating the pairs of conductors on the substrate which would isolate the pairs, the circuit paths of the adjacent conductors of each pair which are parallel and adjacent within the connector and which cause the cross talk are reversed and made parallel to and adjacent to the opposite conductors in a pair preferably for a length similar to the length of the contacts within the connector depending on electrical field strength effects due to geometry of the conductor relationships and dielectric constant of the material surrounding them. This crossing of the conductors results in a cancellation of a substantial portion of the cross talk which was induced within the connector.
The spacing between adjacent conductors on the substrate may be adjusted depending on the differences between the dielectric constants within the connector and the dielectric constants on the substrate and space restrictions on the circuit substrate which may also cause physical path length to be reduced or lengthened.
In another form of this invention where two pairs of signal paths are adjacent to one another for the first path length the positions of two of the conductors of one pair are reversed in the second path length so that cross talk is cancelled.
WO93/19500 PCT/llS93/02~7 .
The invention thus provides a low cross talk electrical signal transmission system. The invention further provides an apparatus for cancelling cross talk which arises within an electrical connector having closely spaced parallel contacts, and provides an electrical connector apparatus which is able to equal or exceed pair to pair cross talk standards.
Brief Description of Drawinqs The subject matter which is regarded as the invention is set forth in~the appended claims. The invention itself, however, together with further objects and advantages thereof may be better understood in reference to the following description taken in conjunction with the accompanying drawings in which:
Figure 1 is a pictorial view sho~iing portions of a typical FCC modular jack and its associated plug and illustrating the contacts;
Figure 2 is a side elevational view of the jack of Figure 1 showing the jack connected to a circuit board.
Figure 3 is a side view showing the conductive tracings of a portion of the circuit board of Figure 2 using prior art design techniques;
Figure 4 is a simplified top view of the apparatus of Figure 2 showing the contacts in the jack and the tracing on the circuit board using prior art design techniques with the circuit board having been rotated so degrees for ease of understanding;
Figure 5 is a pictorial view of a typical connector having six modular jacks connected thereto in which the invention may be utilized.
Figure 6 is a pictorial view of the other side of the connector of Figure 5.
Figure 7 is a simplified top view of the apparatus of 35 Figure 2 showing the contacts in the jack and the tracings on the circuit board in accordance-with one embodiment of WO93/19500 PCT/~'S93/025~7 - 6 ~ ~l 097 Ql the invention with the circuit board having been rotated 9o degrees for ease of understanding;
Figure 8 is a side elevational view of a circuit board illustrating one embodiment of the invention wherein six modular jacks are utilized;
Figure 9 is a side elevational view of a portion of the circuit board of Figure 8 but illustrating two adjacent pairs of signal paths;
Figure 10 is a graph comparing near end cross talk readings utilizing the six plugs and tracings shown in Figures 5 and 8 as compared to the prior art shown in Figure 3;
Figure 11 is a pictorial view showing a jumper which may be used between a jack and a plug for another embodiment of the invention;
Figure 12 is a top view of Figure 11, with portions removed, illustrating the configuration of the conductors within the cable portion which provides cross talk reduction;
Figure 13 is a pictorial view of a connector apparatus with portions removed for illustrative purposes showing another embodiment of the invention;
Figure 14 is a pictorial view showing an array of jack contacts within a jack illustrating yet another embodiment of the invention;
Figure 15 is a simplified top view showing an alternative embodiment to that of Figure 7.
Best Mode for Carryinq out the Invention Referring now to Figures 1 through 15, there is provided modular jack 10 including an array 12 of closely spaced parallel electrical contacts. In this embodiment there are only two signal pairs, namely pair 14 and pair 20. Signal pair 14 includes the central two conductors 16 and 18 of the array and signal pair 20 includes conductors 22 and 24 which flank signal pair 14. Conductors 16 and 18 are also referred to as tip (T) and ring (R) conductors of WO 93/19500~ PCr/~lS93/02~, - 7 210970~
the signal pair 14 and conductors 22 and 24 form the tip (T) and ring (R) conductors of signal pair 20. For ease of understanding, the entire circuit path which includes contacts, conductors and circuit board tracings are sometimes referred to herein as (T) or (R). Although only two pairs of conductors are shown in Figure 1 for ease of illustration, often three or four pairs of conductors are provided within the same jack. The associated modular plug-11 having closely spaced and parallel contacts 13, 15, 17 and 19 and conductors 21, 23, 25, and 27 is also shown in Figure 1. Because of the spacing requirements of the contacts and conductors within the jack and plug, a substantial amount of pair to pair cross talk is introduced. Primarily there is substantial cross talk between conductor 18 and conductor 24 (one cross talking pair) and between conductor 16 and conductor 22 (another cross talking pair). In addition the adjacent contacts and conductors of each signal pair in the plug 11 introduces cross talk.
The tails of contacts 12 are soldered to a substrate such as a circuit board 30, in the case of a prior art design as shown in Figure 3, and to circuit board 32 as shown in Figure 8 using the design of one embodiment of the present invention. In using the prior art design, it was believed that the tracings on the circuit board, which continues the circuit paths of the contacts, should be structured so that cross talk does not increase beyond what occurred within the connector body. Thus tracing 34 forming part of (R2) was placed adjacen. and parallel to 30 tracing 36 (T2), and tracing 38 (T1) and tracing 40 (T2) were placed adjacent and parallel to one another. Thus the two pairs were spaced apart from one another thereby having little if any impact on the cross talk which arose within the connector body.
The cross talk characteristics for a typical prior art design as shown in Figure 3 is illustrated by line 43 in Figure 10 which shows the cross talk measured in -dB over a WO93/19500 PCT/~'S93/025~7 range of frequencies. The cross talk was measured by applying a signal on pair 14 and measuring resulting induced portion of the signal on pair 20. At a frequency of 16 MHz, which is a standard frequency for measuring cross talk, the cross talk was -50 db at 16 MHz. This level of cross talk is unacceptable for many applications.
Applicant has found that the cross talk induced within the plug ll and jack lO connectors because of the closely spaced parallel conductors may be substantially reduced by changing the tracings on the circuit board so that rather than isolating the signal pairs, each cross talking conductor path in one signal pair is actually placed adjacent to the opposite conductive path of the other signal pair and the cross talk is substantially cancelled by cross talk energy which is effectively 180 degrees out of phase with the cross talk energy induced by the plug and jack connectors. The conductive paths of one signal pair is referred to in the drawings as Tl and Rl and the second signal pair~is referred to as T2 and R2. Inside the connector bodies lO and ll Tl is adjacent to R2 (cross talking pair) and T2 is adjacent to Rl (cross talking pair). By placing T2 adjacent to Tl and away from Rl, and R2 adjacent to Rl and away from Tl on the circuit board 32 as shown in Figures 7 and 9, a substantial amount of the cross talk which occurred within connector bodies is cancelled. This is further illustrated in Figure 9 where tracing 42 which is R2 runs adjacent to tracing 44 which is Rl and away from tracing 48 which is Tl, and tracing 46 which is T2 runs very close to tracing 48 which is Tl and away from tracing 44 which is Rl. In Figure 9, the open line portion 46' of tracing 46 illustrates that a portion is running on the bottom side of the circuit board 32.
Referring now to the graph of Figure lO, lines 50, 52, 54, 56, 58 and 60 illustrate the improvement in cross talk which is achieved utilizing the circuit board tracing patterns 50', 52', 54' 56' and 60' on circuit board 32 shown in Figure 8. As can be seen in each of the tracing ~093/19500 PCT/~'S93/025~7 -- 9 ~ 0 1 patterns on circuit board 32, circuit path of T2, which was adjacent to Rl in each connector 10, is placed adjacent to the circuit path T1, and the circuit path of R2, which was adjacent to T1 in each connector, is placed adjacent to the circuit path R1. Thus it can be seen that reductions of cross talk ranging from -10 dB to -25 dB at 16 MHz are achieved utilizing the invention. Since dB is measured in logarithmic terms, each 10 dB reduction results in a ten fold improvement.
Referring now more particularly to Figures 11 and 12, there is shown an alternative embodiment of the invention.
Rather than provide modifications to what WaS heretofore thought to be proper routing techniques on a circuit board by reversing and closely spacing the cross talking conductors adjacent to one another, a jumper 62 is provided which includes an FCC modular jack 64 and an FCC modular plug 66. A substrate such as a flat cable is connected between the jack 64 and plug 66. Cable 68 connects the jack 64 to plug 66. Plug 11 is connected to jack 64, and plug 66 is connected to jack 10 thereby forming a jumper between plug 11 and jack 10. In this embodiment the prior art circuit board shown in Figure 3 would be used with jack 10 .
The conductors within cable 68 are illustrated in Figure 12. Again the portions of the R2 and T2 paths are reversed in the cable so as to cancel the cross talk induced in plugs 11 and 66 and jacks 10 and 64. The length L of the reversed conductors should approximate the lengths of the contacts and conductor in the plugs and jacks, again depending on the dielectric constants and the spacing. It has been found in this embodiment as well as the other embodiments of this invention that by reversing the cross-talking paths a substantial cross talk reduction is achieved. For maximum cross talk cancellation, the length of the jumper and spacing between conductors should be adjusted and held as closely as possible to design dimensions.
WO93/19500 PCT/~lS93tO2~57 21 ~9701 Figure 13 shows still another embodiment of the invention whereby rather than using a jumper with a cable to reduce cross talk arising in a jack and plug, a connector module 70 is utilized having a substrate such as a circuit board within the module and which utilizes the same crossing of the R2 and T2 paths to effectuate the reduction of cross talk.
The devices of Figures 11 and 13 may be utilized in retrofit applications so that new circuit boards need not be manufactured.
Figure 14 shows still another embodiment of the invention whereby the ,conductor array 72 within jack housing 10 is modified by again crossing T2 and R2 paths in the same fashion as shown in-Figures 7, 12 and 13. In this way, circuit board 28 need not be modified. That is, the prior art circuit board shown in Figure 3 may be utilized and one may still achieve a cancelling of cross talk which is both induced and cancelled within connector 10.
Figure 15 shows yet another embodiment of the invention where each pair of contacts 74 (T1, R1) and 76 (T2, R2) in connector 10 are adjacent to one another and thus most of the capacitive coupling or cross talk occurs between contact 78 and contact 80. Cross talk reduction is obtained by placing tracing 82 (T2) adjacent to tracing 84 (T1) on circuit board 86 and by placing tracing 88 (R2) away from tracing 84 (T2). In the embodiment of Figure 15, there is no need to reconfigure the T1, R1 circuit path on the circuit board.
From the foregoing description of the preferred embodiments of the invention, it will be apparent that many modifications may be made therein. It is to be understood that all such modifications are embodied in the accompanying claims which come within the true spirit and scope of this invention.
WO93/19500 PCT/~IS93/02557 Industrial APPlicability The invention is applicable to the telephone industry, and provides a technique for reducing cross talk arising in FCC type modular jacks and plugs and other signal connectors by taking advantage of the cross talk itself, that is, by reversing the position of the tip (T) and ring (R) conductors in adjacent pairs so that each conductor of a first pair which was originally cross talking with a conductor of the second pair is placed adjacent and parallel to the other conductor of the second pair and away from its origi~al conductor for a certain distance by changing the circuit paths either on a substrate such as a circuit board, in a jumper, or within the housing of the connector itself.
Claims (20)
1. A low cross talk electrical signal transmission system comprising an electrical connection apparatus including an intermatable connector and a substrate; said intermatable connector including a plug and a jack; said jack attached to said substrate; said intermatable connector and said substrate having at least first, second, third and fourth conductors; said first and second conductors forming a first signal pair; said third and fourth conductors forming a second signal pair; said first and second conductors being adjacent to and parallel to one another through at least a major portion of said intermatable connector; said third conductor being adjacent to and parallel to said first conductor, and said fourth conductor being adjacent to and parallel to said second conductor through at least a portion of said intermatable connector thereby forming a first group of signal paths thus inducing cross talk from one signal pair to another signal pair in said intermatable connector when signals are applied to either of said signal pairs;
characterized in that said third conductor is adjacent to and parallel to said second conductor and said fourth conductor is adjacent to and parallel to said first conductor for at least a portion of said substrate forming a second group of signal paths, thereby cancelling a substantial amount of said cross talk.
characterized in that said third conductor is adjacent to and parallel to said second conductor and said fourth conductor is adjacent to and parallel to said first conductor for at least a portion of said substrate forming a second group of signal paths, thereby cancelling a substantial amount of said cross talk.
2. A system as set forth in Claim 1 wherein said substrate is a circuit board.
3. A system as set forth in Claim 1 wherein said connector apparatus includes a jumper including a second jack, a plug and a second substrate connected between said second jack and said plug.
4. A system as set forth in Claim 3 wherein said second substrate is a cable.
5. A system as set forth in Claim 3 wherein said substrate is received within an enclosure; a second jack and a second plug are attached to said enclosure.
6. A system as set forth in Claim 1 wherein the length of said second group of circuit paths is substantially the same as the length of said first group of circuit paths.
7. A low cross talk electrical signal transmission system comprising:
at least four conductive paths formed by a first pair of conductors and a second pair of conductors; each pair of conductors being a part of a separate electrical circuit each conducting separate electrical signals;
an intermatable electrical connector including a plug and a jack; first portions of each of said conductive paths being through said connector; said conductive paths being substantially parallel to one another through at least a part of said connector thereby causing pair to pair signal interference when an electrical signal is on at least one of said pairs;
a substrate; second portions of each of said conductive paths being on said substrate; said substrate connected to said jack;
characterized in that there is a capacitance located on said substrate for reducing the pair to pair signal interference, said capacitance being formed by the arrangement of said second portions of said conductive paths on said substrate.
at least four conductive paths formed by a first pair of conductors and a second pair of conductors; each pair of conductors being a part of a separate electrical circuit each conducting separate electrical signals;
an intermatable electrical connector including a plug and a jack; first portions of each of said conductive paths being through said connector; said conductive paths being substantially parallel to one another through at least a part of said connector thereby causing pair to pair signal interference when an electrical signal is on at least one of said pairs;
a substrate; second portions of each of said conductive paths being on said substrate; said substrate connected to said jack;
characterized in that there is a capacitance located on said substrate for reducing the pair to pair signal interference, said capacitance being formed by the arrangement of said second portions of said conductive paths on said substrate.
8. A system as set forth in Claim 7 wherein said substrate is a circuit board.
9. A system as set forth in Claim 7 wherein said substrate is a cable.
10. A system as set forth in Claim 7 wherein each pair includes a first and a second conductor; said first conductor of said first pair is adjacent to said second conductor of said second pair, and said second conductor of said first pair is adjacent to said first conductor of said second pair for the length of said conductive paths in said connector; said capacitance formed by said first pair being adjacent to said first conductor of said second pair, and said second conductor of said first pair being adjacent to said seeond conductor of said second pair for a portion of the length of said conductive paths on said substrate.
11. A low cross talk electrical signal transmission system as set forth in Claim 7 wherein said capacitance comprises said second portions of said conductive paths.
12. An electrical connector system comprising:
an intermatable connector having at least four parallel adjacent contacts; two of said contacts being inner contacts and forming a first conductive pair; two other contacts adjacent to said inner contacts on the outside thereof forming a second conductive pair; said connector including a jack and a plug;
a carrier; said jack connected to said carrier;
said carrier including at least four conductors; each of said conductors connected to one of said contacts; said first contact of said first pair connected to said first conductor of said first pair; said second contact of said first pair connected to said second conductor of said second pair; said first contact of said second pair adjacent to said first conductor of said second pair; said second contact of said second pair connected to said second conductor of said second pair;
for a substantial portion of the length of said carrier said first conductor of said second pair being adjacent to said second conductor of said first pair, and said second conductor of said second pair being adjacent to said first conductor of said first pair whereby a substantial amount of pair to pair interference which is generated in said connector is cancelled on said carrier wherein said interference is substantially reduced in said system.
an intermatable connector having at least four parallel adjacent contacts; two of said contacts being inner contacts and forming a first conductive pair; two other contacts adjacent to said inner contacts on the outside thereof forming a second conductive pair; said connector including a jack and a plug;
a carrier; said jack connected to said carrier;
said carrier including at least four conductors; each of said conductors connected to one of said contacts; said first contact of said first pair connected to said first conductor of said first pair; said second contact of said first pair connected to said second conductor of said second pair; said first contact of said second pair adjacent to said first conductor of said second pair; said second contact of said second pair connected to said second conductor of said second pair;
for a substantial portion of the length of said carrier said first conductor of said second pair being adjacent to said second conductor of said first pair, and said second conductor of said second pair being adjacent to said first conductor of said first pair whereby a substantial amount of pair to pair interference which is generated in said connector is cancelled on said carrier wherein said interference is substantially reduced in said system.
13. A system as set forth in Claim 12 wherein said carrier is a circuit board.
14. A system as set forth in Claim 12 wherein said carrier is a cable; a jumper; said cable forming a part of said jumper.
15. A system as set forth in Claim 14 wherein said jumper includes a plug connected to said cable; said plug having at least four contacts and at least four parallel conductors; said plug adapted to be removably received in said connector.
16. A system as set forth in Claim 15 wherein said jumper includes a second connector connected to said cable on the opposite end from said plug; said second connector having at least four contacts.
17. A system as set forth in Claim 12 further including a plug having at least four adjacent contacts and at least four parallel conductors; the length of said conductors on said substantial portion of said carrier being substantially equal to the length of the contacts in said connector and said plug plus the length of said conductors in said plug.
18. A system as set forth in Claim 16 wherein the length of said conductors on said substantial portion of said carrier being substantially equal to the sum of the length of the contacts in both of said connectors and the length of said conductors in both of said plugs.
19. A low cross talk electrical connector system comprising:
an intermatable electrical connector having at least two pairs of closely spaced electrical contacts thereby causing pair to pair cross talk when electrical signals are present on at least one of said pairs of said contacts; said connector including a plug and a jack;
a carrier; said carrier connected to said jack;
said carrier including at least four conductors; each of said conductors being connected to one of said contacts;
said conductors being physically oriented on said carrier for substantially reducing pair to pair cross talk originating in said connector.
an intermatable electrical connector having at least two pairs of closely spaced electrical contacts thereby causing pair to pair cross talk when electrical signals are present on at least one of said pairs of said contacts; said connector including a plug and a jack;
a carrier; said carrier connected to said jack;
said carrier including at least four conductors; each of said conductors being connected to one of said contacts;
said conductors being physically oriented on said carrier for substantially reducing pair to pair cross talk originating in said connector.
20. A system as set forth in Claim 19 wherein at least one of said conductors is crossed over at least another of said conductors.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US07/855,893 | 1992-03-23 | ||
US07855893 US5299956B1 (en) | 1992-03-23 | 1992-03-23 | Low cross talk electrical connector system |
Publications (2)
Publication Number | Publication Date |
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CA2109701A1 CA2109701A1 (en) | 1993-09-30 |
CA2109701C true CA2109701C (en) | 1996-10-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA002109701A Expired - Lifetime CA2109701C (en) | 1992-03-23 | 1993-03-18 | Low cross talk electrical connector system |
Country Status (3)
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---|---|
US (2) | US5299956B1 (en) |
CA (1) | CA2109701C (en) |
WO (1) | WO1993019500A1 (en) |
Families Citing this family (223)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5186647A (en) | 1992-02-24 | 1993-02-16 | At&T Bell Laboratories | High frequency electrical connector |
US5432484A (en) * | 1992-08-20 | 1995-07-11 | Hubbell Incorporated | Connector for communication systems with cancelled crosstalk |
US5414393A (en) * | 1992-08-20 | 1995-05-09 | Hubbell Incorporated | Telecommunication connector with feedback |
AU4969093A (en) * | 1992-08-24 | 1994-03-15 | British Telecommunications Public Limited Company | Apparatus and method for crosstalk cancellation in data correctors |
GB2270422B (en) * | 1992-09-04 | 1996-04-17 | Pressac Ltd | Method and apparatus for cross talk cancellation |
GB2273397B (en) * | 1992-11-16 | 1997-01-29 | Krone Ag | Electrical connectors |
US5295869A (en) | 1992-12-18 | 1994-03-22 | The Siemon Company | Electrically balanced connector assembly |
US6758698B1 (en) | 1992-12-23 | 2004-07-06 | Panduit Corp. | Communication connector with capacitor label |
TW218060B (en) * | 1992-12-23 | 1993-12-21 | Panduit Corp | Communication connector with capacitor label |
US6102730A (en) * | 1995-09-01 | 2000-08-15 | Cekan/Cdt A/S | Connector element for telecommunications |
DK28193D0 (en) * | 1993-03-12 | 1993-03-12 | Poul Kjeldahl | COMMUNICATION NETWORK CONNECTOR |
US6464529B1 (en) | 1993-03-12 | 2002-10-15 | Cekan/Cdt A/S | Connector element for high-speed data communications |
US5562479A (en) * | 1993-08-31 | 1996-10-08 | At&T Corp. | Connector for unshielded twisted wire pair cables |
GB2282712B (en) * | 1993-08-31 | 1997-09-10 | At & T Corp | Electrical connectors for minimizing cross-talk |
JPH07176336A (en) | 1993-09-30 | 1995-07-14 | Siemon Co:The | Wiring block electrically extended provided with break test function |
US5470244A (en) * | 1993-10-05 | 1995-11-28 | Thomas & Betts Corporation | Electrical connector having reduced cross-talk |
GB2271678B (en) * | 1993-12-03 | 1994-10-12 | Itt Ind Ltd | Electrical connector |
US5639266A (en) | 1994-01-11 | 1997-06-17 | Stewart Connector Systems, Inc. | High frequency electrical connector |
EP0674364B1 (en) * | 1994-03-26 | 1999-11-24 | Molex Incorporated | Modular jack type connector |
JP3192318B2 (en) * | 1994-05-20 | 2001-07-23 | 松下電工株式会社 | Wireless information transmission system |
US5476388A (en) * | 1994-06-23 | 1995-12-19 | At&T Corp. | Connector block |
DE69430194T2 (en) * | 1994-07-14 | 2002-10-31 | Molex Inc | Modular connector with reduced crosstalk |
FR2723479B1 (en) * | 1994-08-08 | 1996-09-13 | Connectors Pontarlier | LOW CROSS-LINK NETWORK CONNECTION |
US5593317A (en) * | 1994-08-31 | 1997-01-14 | The Whitaker Corporation | Modular furniture communication system |
EP0709930A3 (en) | 1994-10-28 | 1997-09-10 | Whitaker Corp | Capacitive trace coupling for reduction of crosstalk |
US5556307A (en) * | 1994-11-29 | 1996-09-17 | The Wiremold Company | Modular telecommunication jack assembly |
US5599209A (en) | 1994-11-30 | 1997-02-04 | Berg Technology, Inc. | Method of reducing electrical crosstalk and common mode electromagnetic interference and modular jack for use therein |
US5488201A (en) * | 1994-12-16 | 1996-01-30 | Dan-Chief Enterprise Co., Ltd. | Low crosstalk electrical signal transmission medium |
BR9606776A (en) * | 1995-01-25 | 1998-01-06 | Haworth Inc | Office furniture and telecommunications cabling system |
WO1996023339A2 (en) * | 1995-01-25 | 1996-08-01 | Haworth, Inc. | Modular communication cabling arrangement |
US5964609A (en) | 1995-01-25 | 1999-10-12 | Haworth, Inc. | Modular communication cabling arrangement |
US5586914A (en) * | 1995-05-19 | 1996-12-24 | The Whitaker Corporation | Electrical connector and an associated method for compensating for crosstalk between a plurality of conductors |
USD382274S (en) * | 1995-11-22 | 1997-08-12 | The Siemon Company | Gravity feed telecommunications connector |
US5769647A (en) * | 1995-11-22 | 1998-06-23 | The Siemon Company | Modular outlet employing a door assembly |
US5791943A (en) * | 1995-11-22 | 1998-08-11 | The Siemon Company | Reduced crosstalk modular outlet |
US5685742A (en) * | 1995-11-28 | 1997-11-11 | Molex Incorporated | Electrical connector |
CN1049313C (en) * | 1995-12-06 | 2000-02-09 | 登骐企业股份有限公司 | Low-crosstalk electrical signal transmitting medium |
US5706160A (en) * | 1995-12-22 | 1998-01-06 | Illinois Tool Works, Inc. | Transmission bandwidth extender/category 5 protector |
US5841620A (en) * | 1995-12-22 | 1998-11-24 | Illinois Tool Works Inc. | Transmission bandwidth extender/category 5 protector |
AU716436B2 (en) * | 1995-12-25 | 2000-02-24 | Matsushita Electric Works Ltd. | Connector |
DE19607534A1 (en) * | 1996-02-28 | 1997-09-04 | Amp Holland | Method for connecting data transmission lines and plug connectors |
JP3802070B2 (en) * | 1996-02-29 | 2006-07-26 | ザ ウィタカー コーポレーション | Non-resistive energy coupling for crosstalk reduction |
US6065994A (en) * | 1996-06-21 | 2000-05-23 | Lucent Technologies Inc. | Low-crosstalk electrical connector grouping like conductors together |
US5674093A (en) * | 1996-07-23 | 1997-10-07 | Superior Modular Process Incorporated | Reduced cross talk electrical connector |
US5911602A (en) * | 1996-07-23 | 1999-06-15 | Superior Modular Products Incorporated | Reduced cross talk electrical connector |
US5700167A (en) * | 1996-09-06 | 1997-12-23 | Lucent Technologies | Connector cross-talk compensation |
DE19649668C1 (en) * | 1996-11-29 | 1998-05-28 | Siemens Ag | Plug for four line-pairs of data transmission system patch cable |
USD408358S (en) * | 1996-12-02 | 1999-04-20 | Hubbell Incorporated | Front access cross-connect block |
US5779503A (en) * | 1996-12-18 | 1998-07-14 | Nordx/Cdt, Inc. | High frequency connector with noise cancelling characteristics |
JP3528484B2 (en) * | 1996-12-27 | 2004-05-17 | モレックス インコーポレーテッド | Pseudo twisted pair flat flexible cable |
US5961354A (en) * | 1997-01-13 | 1999-10-05 | Lucent Technologies, Inc. | Electrical connector assembly |
US5944535A (en) * | 1997-02-04 | 1999-08-31 | Hubbell Incorporated | Interface panel system for networks |
US5931703A (en) * | 1997-02-04 | 1999-08-03 | Hubbell Incorporated | Low crosstalk noise connector for telecommunication systems |
US5797764A (en) * | 1997-02-12 | 1998-08-25 | Homaco, Inc. | Low return loss and low crosstalk telecommunications electric circuit |
DE19708798A1 (en) * | 1997-03-05 | 1998-09-24 | Krone Ag | Arrangement of contact pairs to compensate for the near crosstalk |
US6650525B2 (en) | 1997-04-08 | 2003-11-18 | X2Y Attenuators, Llc | Component carrier |
US6509807B1 (en) | 1997-04-08 | 2003-01-21 | X2Y Attenuators, Llc | Energy conditioning circuit assembly |
US6995983B1 (en) | 1997-04-08 | 2006-02-07 | X2Y Attenuators, Llc | Component carrier |
US7301748B2 (en) | 1997-04-08 | 2007-11-27 | Anthony Anthony A | Universal energy conditioning interposer with circuit architecture |
US7321485B2 (en) | 1997-04-08 | 2008-01-22 | X2Y Attenuators, Llc | Arrangement for energy conditioning |
US7336468B2 (en) | 1997-04-08 | 2008-02-26 | X2Y Attenuators, Llc | Arrangement for energy conditioning |
US6606011B2 (en) | 1998-04-07 | 2003-08-12 | X2Y Attenuators, Llc | Energy conditioning circuit assembly |
US9054094B2 (en) | 1997-04-08 | 2015-06-09 | X2Y Attenuators, Llc | Energy conditioning circuit arrangement for integrated circuit |
AUPO635197A0 (en) * | 1997-04-22 | 1997-05-15 | Minitronics Pty. Limited | Cable system |
AU752830B2 (en) * | 1997-05-19 | 2002-10-03 | Avaya Technology Corp. | Low-crosstalk electrical connector grouping like conductors together |
US5997358A (en) * | 1997-09-02 | 1999-12-07 | Lucent Technologies Inc. | Electrical connector having time-delayed signal compensation |
CH693012A5 (en) * | 1997-06-02 | 2003-01-15 | Reichle & De Massari Fa | A plug connector for high-frequency data transmission over electrical conductors. |
US5924896A (en) * | 1997-08-01 | 1999-07-20 | Lucent Technologies Inc. | High frequency communication jack |
US5975919A (en) * | 1997-08-26 | 1999-11-02 | Lucent Technologies Inc. | Terminal housing and wire board arrangement with solderless mountable insulation displacement connector terminals |
US6012953A (en) | 1997-08-05 | 2000-01-11 | 3Com Corporation | Surface mountable electrical connector system |
US5947772A (en) * | 1997-08-22 | 1999-09-07 | Lucent Technologies Inc. | Wire terminal block for communication connectors |
GB2332786B (en) * | 1997-11-04 | 2001-10-10 | Richard Weatherley | Plug and mating socket for data transmission systems |
US6007368A (en) * | 1997-11-18 | 1999-12-28 | Leviton Manufacturing Company, Inc. | Telecommunications connector with improved crosstalk reduction |
EP1072069A4 (en) | 1998-04-16 | 2002-01-09 | Thomas & Betts Int | Crosstalk reducing electrical jack and plug connector |
DE19822630C1 (en) * | 1998-05-20 | 2000-09-07 | Krone Gmbh | Arrangement of contact pairs to compensate for the near crosstalk for an electrical connector |
IL139807A0 (en) | 1998-06-02 | 2002-02-10 | Stewart Connector Systems Inc | High frequency electrical connector assembly such as multi-port multi-level connector assembly |
US6537106B1 (en) | 1998-06-05 | 2003-03-25 | Adc Telecommunications, Inc. | Telecommunications patch panel with angled connector modules |
KR100295154B1 (en) | 1998-06-12 | 2001-09-17 | 윤종용 | Impedance Matching Circuit |
US6057743A (en) * | 1998-06-22 | 2000-05-02 | Hubbell Incorporation | Distributed noise reduction circuits in telecommunication system connector |
US6066005A (en) * | 1998-06-30 | 2000-05-23 | Berg Technology, Inc. | Vertical modular connector having low electrical crosstalk |
US6017240A (en) * | 1998-07-21 | 2000-01-25 | Berg Technology, Inc. | Modular plug having low electrical cross talk and metallic contact for use therein |
USRE38519E1 (en) * | 1998-08-24 | 2004-05-18 | Panduit Corp. | Low crosstalk modular communication connector |
US6371793B1 (en) | 1998-08-24 | 2002-04-16 | Panduit Corp. | Low crosstalk modular communication connector |
US6394822B1 (en) * | 1998-11-24 | 2002-05-28 | Teradyne, Inc. | Electrical connector |
US6152747A (en) * | 1998-11-24 | 2000-11-28 | Teradyne, Inc. | Electrical connector |
CA2291373C (en) | 1998-12-02 | 2002-08-06 | Nordx/Cdt, Inc. | Modular connectors with compensation structures |
US6354865B1 (en) | 1998-12-17 | 2002-03-12 | Tyco Electronics Logistics Ag | Modular electrical plug including a printed circuit substrate |
US6334792B1 (en) | 1999-01-15 | 2002-01-01 | Adc Telecommunications, Inc. | Connector including reduced crosstalk spring insert |
HUP0105197A2 (en) * | 1999-01-15 | 2002-05-29 | Adc Telecommunications Inc | Telecommunications jack assembly |
US6394835B1 (en) | 1999-02-16 | 2002-05-28 | Hubbell Incorporated | Wiring unit with paired in-line insulation displacement contacts |
US6165018A (en) * | 1999-04-27 | 2000-12-26 | Lucent Technologies Inc. | Connector having internal crosstalk compensation |
US6283768B1 (en) | 1999-05-13 | 2001-09-04 | Ideal Industries, Inc. | RJ-45 style modular connector |
US6186834B1 (en) * | 1999-06-08 | 2001-02-13 | Avaya Technology Corp. | Enhanced communication connector assembly with crosstalk compensation |
US6176742B1 (en) | 1999-06-25 | 2001-01-23 | Avaya Inc. | Capacitive crosstalk compensation arrangement for communication connectors |
US6089923A (en) | 1999-08-20 | 2000-07-18 | Adc Telecommunications, Inc. | Jack including crosstalk compensation for printed circuit board |
US6520806B2 (en) | 1999-08-20 | 2003-02-18 | Adc Telecommunications, Inc. | Telecommunications connector for high frequency transmissions |
US6196880B1 (en) | 1999-09-21 | 2001-03-06 | Avaya Technology Corp. | Communication connector assembly with crosstalk compensation |
US6244906B1 (en) | 1999-12-21 | 2001-06-12 | Avaya Technology Corp. | Low cross talk plug and jack |
US6962503B2 (en) | 2000-01-10 | 2005-11-08 | Ortronics, Inc. | Unshielded twisted pair (UTP) wire stabilizer for communication plug |
US6190211B1 (en) * | 2000-02-23 | 2001-02-20 | Telebox Industries Corp. | Isolation displacement connector |
AUPQ609900A0 (en) * | 2000-03-08 | 2000-03-30 | Krone (Australia) Technique Pty Limited | Compensation device for an electrical connector |
US6283795B1 (en) * | 2000-03-14 | 2001-09-04 | Surtec Industries Inc. | Electrical connector with reduced attenuation, near-end cross talk, and return loss |
US6533618B1 (en) | 2000-03-31 | 2003-03-18 | Ortronics, Inc. | Bi-directional balance low noise communication interface |
US6517377B2 (en) | 2000-05-25 | 2003-02-11 | Sterling Vaden | Reduced crosstalk modular plug and patch cord incorporating the same |
US6346010B1 (en) | 2000-08-10 | 2002-02-12 | The Wiremold Company | Modular connector |
US6379157B1 (en) | 2000-08-18 | 2002-04-30 | Leviton Manufacturing Co., Inc. | Communication connector with inductive compensation |
US6331126B1 (en) | 2000-09-07 | 2001-12-18 | Sentinel Holding, Inc. | High speed modular jack |
US6350158B1 (en) | 2000-09-19 | 2002-02-26 | Avaya Technology Corp. | Low crosstalk communication connector |
US6729901B2 (en) | 2000-09-29 | 2004-05-04 | Ortronics, Inc. | Wire guide sled hardware for communication plug |
US6802743B2 (en) * | 2000-09-29 | 2004-10-12 | Ortronics, Inc. | Low noise communication modular connector insert |
KR100712468B1 (en) * | 2001-03-28 | 2007-04-27 | 주식회사 케이티 | An electric connector |
US6979202B2 (en) * | 2001-01-12 | 2005-12-27 | Litton Systems, Inc. | High-speed electrical connector |
US6910897B2 (en) | 2001-01-12 | 2005-06-28 | Litton Systems, Inc. | Interconnection system |
US6843657B2 (en) | 2001-01-12 | 2005-01-18 | Litton Systems Inc. | High speed, high density interconnect system for differential and single-ended transmission applications |
US6896557B2 (en) | 2001-03-28 | 2005-05-24 | Ortronics, Inc. | Dual reactance low noise modular connector insert |
US7172466B2 (en) * | 2001-04-05 | 2007-02-06 | Ortronics, Inc. | Dual reactance low noise modular connector insert |
US6511344B2 (en) | 2001-07-02 | 2003-01-28 | Fci Americas Technology, Inc. | Double-deck electrical connector with cross-talk compensation |
US6600106B2 (en) * | 2001-07-11 | 2003-07-29 | Adc Telecommunications, Inc. | Cable management bar and patch panel |
KR20030018516A (en) * | 2001-08-30 | 2003-03-06 | 백승재 | RJ45 Pin-Route Converter |
US6744329B2 (en) * | 2001-12-14 | 2004-06-01 | Yazaki North America, Inc. | Cross talk compensation circuit |
US6795289B2 (en) * | 2002-01-11 | 2004-09-21 | Illinois Tool Works Inc. | Dual sneak current protector |
US6746283B2 (en) | 2002-02-15 | 2004-06-08 | Avaya Technology Corp. | Terminal housing for a communication jack assembly |
DE10242143A1 (en) * | 2002-09-04 | 2004-03-25 | Telegärtner Karl Gärtner GmbH | Electrical socket |
US6786776B2 (en) * | 2002-09-27 | 2004-09-07 | Leviton Manufacturing Co., Inc. | Electrical connector jack |
US6641443B1 (en) * | 2002-09-27 | 2003-11-04 | Leviton Manufacturing Co., Inc. | Electrical connector jack |
US6964587B2 (en) * | 2002-11-10 | 2005-11-15 | Bel Fuse Ltd. | High performance, high capacitance gain, jack connector for data transmission or the like |
US6814624B2 (en) * | 2002-11-22 | 2004-11-09 | Adc Telecommunications, Inc. | Telecommunications jack assembly |
US7052328B2 (en) | 2002-11-27 | 2006-05-30 | Panduit Corp. | Electronic connector and method of performing electronic connection |
US6821142B1 (en) | 2003-03-04 | 2004-11-23 | Hubbell Incorporated | Electrical connector with crosstalk reduction and control |
DE10310434A1 (en) * | 2003-03-11 | 2004-09-30 | Krone Gmbh | Method for RF tuning of an electrical arrangement and a circuit board suitable for this |
US6848947B2 (en) * | 2003-05-23 | 2005-02-01 | William J. Chimiak | Cross-connector for interfacing multiple communication devices |
CN1902785A (en) * | 2003-11-21 | 2007-01-24 | 莱维顿制造有限公司 | Patch panel with crosstalk reduction system and method |
US7182649B2 (en) | 2003-12-22 | 2007-02-27 | Panduit Corp. | Inductive and capacitive coupling balancing electrical connector |
CN1890854A (en) | 2003-12-22 | 2007-01-03 | X2Y艾泰钮埃特有限责任公司 | Internally shielded energy conditioner |
US7179131B2 (en) * | 2004-02-12 | 2007-02-20 | Panduit Corp. | Methods and apparatus for reducing crosstalk in electrical connectors |
CN102082367B (en) | 2004-03-12 | 2013-11-20 | 泛达公司 | Methods and apparatus for reducing crosstalk in electrical connectors |
US7153168B2 (en) * | 2004-04-06 | 2006-12-26 | Panduit Corp. | Electrical connector with improved crosstalk compensation |
CA2464834A1 (en) * | 2004-04-19 | 2005-10-19 | Nordx/Cdt Inc. | Connector |
EP1774625B1 (en) * | 2004-07-13 | 2014-06-25 | Panduit Corporation | Communications connector with flexible printed circuit board |
US7947371B2 (en) * | 2004-11-05 | 2011-05-24 | E. I. Du Pont De Nemours And Company | Single-walled carbon nanotube composites |
US7264516B2 (en) * | 2004-12-06 | 2007-09-04 | Commscope, Inc. | Communications jack with printed wiring board having paired coupling conductors |
US7326089B2 (en) * | 2004-12-07 | 2008-02-05 | Commscope, Inc. Of North Carolina | Communications jack with printed wiring board having self-coupling conductors |
US7168993B2 (en) * | 2004-12-06 | 2007-01-30 | Commscope Solutions Properties Llc | Communications connector with floating wiring board for imparting crosstalk compensation between conductors |
US7186149B2 (en) * | 2004-12-06 | 2007-03-06 | Commscope Solutions Properties, Llc | Communications connector for imparting enhanced crosstalk compensation between conductors |
EP2224605B1 (en) * | 2004-12-07 | 2016-08-10 | Commscope Inc. of North Carolina | Communications jack with compensation for differential to differential and differential to common mode crosstalk |
US7166000B2 (en) * | 2004-12-07 | 2007-01-23 | Commscope Solutions Properties, Llc | Communications connector with leadframe contact wires that compensate differential to common mode crosstalk |
US7220149B2 (en) * | 2004-12-07 | 2007-05-22 | Commscope Solutions Properties, Llc | Communication plug with balanced wiring to reduce differential to common mode crosstalk |
US7204722B2 (en) * | 2004-12-07 | 2007-04-17 | Commscope Solutions Properties, Llc | Communications jack with compensation for differential to differential and differential to common mode crosstalk |
US7186148B2 (en) * | 2004-12-07 | 2007-03-06 | Commscope Solutions Properties, Llc | Communications connector for imparting crosstalk compensation between conductors |
US7320624B2 (en) * | 2004-12-16 | 2008-01-22 | Commscope, Inc. Of North Carolina | Communications jacks with compensation for differential to differential and differential to common mode crosstalk |
EP1842296A1 (en) | 2005-01-28 | 2007-10-10 | Commscope Inc. of North Carolina | Controlled mode conversion connector for reduced alien crosstalk |
GB2439861A (en) | 2005-03-01 | 2008-01-09 | X2Y Attenuators Llc | Internally overlapped conditioners |
US7817397B2 (en) | 2005-03-01 | 2010-10-19 | X2Y Attenuators, Llc | Energy conditioner with tied through electrodes |
US7091418B1 (en) | 2005-04-01 | 2006-08-15 | Adc Telecommunications, Inc. | Cable management bar and patch panel |
US7314393B2 (en) | 2005-05-27 | 2008-01-01 | Commscope, Inc. Of North Carolina | Communications connectors with floating wiring board for imparting crosstalk compensation between conductors |
US7329137B2 (en) * | 2005-10-05 | 2008-02-12 | Tyco Electronics Corporation | Modular plug with slider latch |
US8011972B2 (en) * | 2006-02-13 | 2011-09-06 | Panduit Corp. | Connector with crosstalk compensation |
US7488206B2 (en) * | 2006-02-14 | 2009-02-10 | Panduit Corp. | Method and apparatus for patch panel patch cord documentation and revision |
EP1991996A1 (en) | 2006-03-07 | 2008-11-19 | X2Y Attenuators, L.L.C. | Energy conditioner structures |
US7377819B1 (en) * | 2006-04-27 | 2008-05-27 | Arrowhead Center, Inc. | Method and apparatus for improving network connection security with one or more cross-wired adapters |
US7530854B2 (en) * | 2006-06-15 | 2009-05-12 | Ortronics, Inc. | Low noise multiport connector |
US7357667B2 (en) * | 2006-06-22 | 2008-04-15 | Adc Telecommunications, Inc. | Telecommunications patch |
US7343078B2 (en) * | 2006-06-29 | 2008-03-11 | Commscope Solutions Properties, Llc | Patch panels with communications connectors that are rotatable about a vertical axis |
US7364470B2 (en) * | 2006-07-05 | 2008-04-29 | Commscope, Inc. Of North Carolina | Communications connectors with signal current splitting |
US7288001B1 (en) | 2006-09-20 | 2007-10-30 | Ortronics, Inc. | Electrically isolated shielded multiport connector assembly |
FR2906939B1 (en) * | 2006-10-09 | 2009-01-23 | Legrand France | CONNECTING DEVICE FOR LOCAL NETWORK |
KR100874911B1 (en) * | 2006-10-30 | 2008-12-19 | 삼성전자주식회사 | Read method of flash memory array to improve read disturb characteristics |
CN201608967U (en) * | 2006-11-14 | 2010-10-13 | 莫列斯公司 | Crosstalk compensation component, printed circuit board, module jack and socket terminals |
DE102006056001B4 (en) * | 2006-11-24 | 2008-12-04 | Phoenix Contact Gmbh & Co. Kg | Field attachable circular connector for Ethernet |
US7488205B2 (en) * | 2006-12-13 | 2009-02-10 | Commscope, Inc. Of North Carolina | Fixed angled patch panel |
AU2007201106B9 (en) * | 2007-03-14 | 2011-06-02 | Tyco Electronics Services Gmbh | Electrical Connector |
AU2007201108B2 (en) * | 2007-03-14 | 2012-02-09 | Tyco Electronics Services Gmbh | Electrical Connector |
AU2007201114B2 (en) * | 2007-03-14 | 2011-04-07 | Tyco Electronics Services Gmbh | Electrical Connector |
AU2007201109B2 (en) * | 2007-03-14 | 2010-11-04 | Tyco Electronics Services Gmbh | Electrical Connector |
AU2007201102B2 (en) * | 2007-03-14 | 2010-11-04 | Tyco Electronics Services Gmbh | Electrical Connector |
AU2007201113B2 (en) * | 2007-03-14 | 2011-09-08 | Tyco Electronics Services Gmbh | Electrical Connector |
AU2007201107B2 (en) * | 2007-03-14 | 2011-06-23 | Tyco Electronics Services Gmbh | Electrical Connector |
AU2007201105B2 (en) * | 2007-03-14 | 2011-08-04 | Tyco Electronics Services Gmbh | Electrical Connector |
US7874878B2 (en) * | 2007-03-20 | 2011-01-25 | Panduit Corp. | Plug/jack system having PCB with lattice network |
US7485010B2 (en) * | 2007-06-14 | 2009-02-03 | Ortronics, Inc. | Modular connector exhibiting quad reactance balance functionality |
US7736195B1 (en) | 2009-03-10 | 2010-06-15 | Leviton Manufacturing Co., Inc. | Circuits, systems and methods for implementing high speed data communications connectors that provide for reduced modal alien crosstalk in communications systems |
MX2010002254A (en) * | 2007-09-19 | 2010-03-25 | Leviton Manufacturing Co | Internal crosstalk compensation circuit formed on a flexible printed circuit board positioned within a communications outlet, and methods and systems relating to same. |
US7967645B2 (en) * | 2007-09-19 | 2011-06-28 | Leviton Manufacturing Co., Inc. | High speed data communications connector circuits, systems, and methods for reducing crosstalk in communications systems |
USD612856S1 (en) | 2008-02-20 | 2010-03-30 | Vocollect Healthcare Systems, Inc. | Connector for a peripheral device |
US7722406B2 (en) * | 2008-03-17 | 2010-05-25 | Zippy Technology Corp. | Output adapting device of plug-in power system |
JP5362006B2 (en) * | 2008-08-13 | 2013-12-11 | パンドウィット・コーポレーション | Communication connector with multistage compensation |
BRPI0917310A2 (en) * | 2008-08-20 | 2015-11-17 | Panduit Corp | communication jack for use in a communication network |
US7682203B1 (en) * | 2008-11-04 | 2010-03-23 | Commscope, Inc. Of North Carolina | Communications jacks having contact wire configurations that provide crosstalk compensation |
US7914346B2 (en) * | 2008-11-04 | 2011-03-29 | Commscope, Inc. Of North Carolina | Communications jacks having contact wire configurations that provide crosstalk compensation |
US8202128B2 (en) * | 2008-11-25 | 2012-06-19 | Adc Gmbh | Telecommunications jack with adjustable crosstalk compensation |
DE102008064535A1 (en) | 2008-12-19 | 2010-06-24 | Telegärtner Karl Gärtner GmbH | Electrical connector |
US8744228B2 (en) * | 2009-05-22 | 2014-06-03 | Commscope, Inc. Of North Carolina | Telecommunications patching system with cable management system and related cable management equipment |
US9664711B2 (en) | 2009-07-31 | 2017-05-30 | Pulse Electronics, Inc. | Current sensing devices and methods |
US9823274B2 (en) | 2009-07-31 | 2017-11-21 | Pulse Electronics, Inc. | Current sensing inductive devices |
US8128436B2 (en) | 2009-08-25 | 2012-03-06 | Tyco Electronics Corporation | Electrical connectors with crosstalk compensation |
US7967644B2 (en) | 2009-08-25 | 2011-06-28 | Tyco Electronics Corporation | Electrical connector with separable contacts |
US8016621B2 (en) | 2009-08-25 | 2011-09-13 | Tyco Electronics Corporation | Electrical connector having an electrically parallel compensation region |
US8435082B2 (en) | 2010-08-03 | 2013-05-07 | Tyco Electronics Corporation | Electrical connectors and printed circuits having broadside-coupling regions |
USD615040S1 (en) | 2009-09-09 | 2010-05-04 | Vocollect, Inc. | Electrical connector |
US8241053B2 (en) * | 2009-09-10 | 2012-08-14 | Vocollect, Inc. | Electrical cable with strength member |
US8262403B2 (en) * | 2009-09-10 | 2012-09-11 | Vocollect, Inc. | Break-away electrical connector |
US7850492B1 (en) | 2009-11-03 | 2010-12-14 | Panduit Corp. | Communication connector with improved crosstalk compensation |
US7828603B1 (en) | 2010-01-07 | 2010-11-09 | Yfc-Boneagle Electric Co., Ltd. | Electrical connector with crosstalk compensation |
EP2363925A1 (en) | 2010-01-11 | 2011-09-07 | YFC-Boneagle Electric Co., Ltd. | Electrical connector with crosstalk compensation |
US8591262B2 (en) | 2010-09-03 | 2013-11-26 | Pulse Electronics, Inc. | Substrate inductive devices and methods |
EP2783469B1 (en) | 2011-11-23 | 2016-06-22 | Panduit Corp. | Compensation network using an orthogonal compensation network |
US9304149B2 (en) | 2012-05-31 | 2016-04-05 | Pulse Electronics, Inc. | Current sensing devices and methods |
US9136647B2 (en) | 2012-06-01 | 2015-09-15 | Panduit Corp. | Communication connector with crosstalk compensation |
US20140125446A1 (en) | 2012-11-07 | 2014-05-08 | Pulse Electronics, Inc. | Substrate inductive device methods and apparatus |
US9905973B2 (en) | 2013-01-23 | 2018-02-27 | Commscope, Inc. Of North Carolina | Communications connectors including transmission lines having impedance discontinuities that improve return loss and/or insertion loss performance and related methods |
US8915756B2 (en) | 2013-01-23 | 2014-12-23 | Commscope, Inc. Of North Carolina | Communication connector having a printed circuit board with thin conductive layers |
US9246463B2 (en) | 2013-03-07 | 2016-01-26 | Panduit Corp. | Compensation networks and communication connectors using said compensation networks |
US9379500B2 (en) * | 2013-03-11 | 2016-06-28 | Panduit Corp. | Front sled assemblies for communication jacks and communication jacks having front sled assemblies |
US9257792B2 (en) | 2013-03-14 | 2016-02-09 | Panduit Corp. | Connectors and systems having improved crosstalk performance |
US9246274B2 (en) * | 2013-03-15 | 2016-01-26 | Panduit Corp. | Communication connectors having crosstalk compensation networks |
WO2014144735A1 (en) | 2013-03-15 | 2014-09-18 | Tyco Electronics Uk Ltd. | Connector with capacitive crosstalk compensation to reduce alien crosstalk |
DE102014104446A1 (en) | 2014-03-28 | 2015-10-01 | Telegärtner Karl Gärtner GmbH | Electrical connector |
DE102014104449A1 (en) | 2014-03-28 | 2015-10-01 | Telegärtner Karl Gärtner GmbH | Electrical connector |
US9583890B2 (en) | 2014-09-30 | 2017-02-28 | Optical Cable Corporation | RJ45 connector |
US9300092B1 (en) | 2014-09-30 | 2016-03-29 | Optical Cable Corporation | High frequency RJ45 plug with non-continuous ground planes for cross talk control |
TWI719986B (en) | 2015-05-29 | 2021-03-01 | 美商光纜公司 | Rj45 connector |
US11817659B2 (en) | 2015-12-08 | 2023-11-14 | Panduit Corp. | RJ45 shuttered jacks and related communication systems |
JP7328492B2 (en) * | 2018-12-03 | 2023-08-17 | 株式会社バッファロー | Relay connector device |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2667543A (en) * | 1950-05-26 | 1954-01-26 | Automatic Telephone & Elect | Electric ribbon cable |
US3757028A (en) * | 1972-09-18 | 1973-09-04 | J Schlessel | Terference printed board and similar transmission line structure for reducing in |
US4157612A (en) * | 1977-12-27 | 1979-06-12 | Bell Telephone Laboratories, Incorporated | Method for improving the transmission properties of a connectorized flat cable interconnection assembly |
US4418239A (en) * | 1981-08-24 | 1983-11-29 | Oak Industries Inc. | Flexible connector with interconnection between conductive traces |
US4551576A (en) * | 1984-04-04 | 1985-11-05 | Parlex Corporation | Flat embedded-shield multiconductor signal transmission cable, method of manufacture and method of stripping |
JPS61256850A (en) * | 1985-05-08 | 1986-11-14 | Fujitsu Ltd | Preventing plug for radio wave of telephone set |
US4831497A (en) * | 1986-09-11 | 1989-05-16 | General Electric Company | Reduction of cross talk in interconnecting conductors |
US4698025A (en) * | 1986-09-15 | 1987-10-06 | Molex Incorporated | Low profile modular phone jack assembly |
US4878847A (en) * | 1987-07-29 | 1989-11-07 | Rutledge Engineering (Aust.) Pty. Ltd. | Patchfield system |
JPH0268484A (en) * | 1988-09-02 | 1990-03-07 | Tdk Corp | Sintering facility |
JPH0291987A (en) * | 1988-09-29 | 1990-03-30 | Y D K:Kk | Printed wiring board |
JPH02268484A (en) * | 1989-04-11 | 1990-11-02 | Hitachi Ltd | Printed circuit board |
GB2233157B (en) * | 1989-06-13 | 1992-10-21 | British Aerospace | Printed circuit board |
DE8911660U1 (en) * | 1989-09-30 | 1990-03-22 | Leinbach, Franz, Dipl.-Geogr., 7400 Tuebingen, De | |
DE59204477D1 (en) * | 1991-08-01 | 1996-01-11 | Siemens Ag | Plug connection for computer networks in the home area. |
US5186647A (en) * | 1992-02-24 | 1993-02-16 | At&T Bell Laboratories | High frequency electrical connector |
-
1992
- 1992-03-23 US US07855893 patent/US5299956B1/en not_active Expired - Lifetime
-
1993
- 1993-03-18 CA CA002109701A patent/CA2109701C/en not_active Expired - Lifetime
- 1993-03-18 WO PCT/US1993/002557 patent/WO1993019500A1/en active Application Filing
- 1993-05-25 US US08/066,974 patent/US5310363A/en not_active Expired - Lifetime
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US5310363A (en) | 1994-05-10 |
AU3814593A (en) | 1993-10-21 |
US5299956A (en) | 1994-04-05 |
WO1993019500A1 (en) | 1993-09-30 |
CA2109701A1 (en) | 1993-09-30 |
AU666932B2 (en) | 1996-02-29 |
US5299956B1 (en) | 1995-10-24 |
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