DE69303204D1 - Tragbarer, batterieloser Frequenzteiler mit magnetischer und elektrischer Kupplung - Google Patents

Tragbarer, batterieloser Frequenzteiler mit magnetischer und elektrischer Kupplung

Info

Publication number
DE69303204D1
DE69303204D1 DE69303204T DE69303204T DE69303204D1 DE 69303204 D1 DE69303204 D1 DE 69303204D1 DE 69303204 T DE69303204 T DE 69303204T DE 69303204 T DE69303204 T DE 69303204T DE 69303204 D1 DE69303204 D1 DE 69303204D1
Authority
DE
Germany
Prior art keywords
resonant circuit
frequency
resonant
circuit
batteryless
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
Application number
DE69303204T
Other languages
English (en)
Other versions
DE69303204T2 (de
Inventor
Ming Ren Lian
Fred Wade Herman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sensormatic Electronics Corp
Original Assignee
Security Tag Systems Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Security Tag Systems Inc filed Critical Security Tag Systems Inc
Application granted granted Critical
Publication of DE69303204D1 publication Critical patent/DE69303204D1/de
Publication of DE69303204T2 publication Critical patent/DE69303204T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G08B13/242—Tag deactivation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2422—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using acoustic or microwave tags
    • G08B13/2425—Tag deactivation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2431—Tag circuit details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
DE69303204T 1992-03-18 1993-03-10 Tragbarer, batterieloser Frequenzteiler mit magnetischer und elektrischer Kupplung Expired - Lifetime DE69303204T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/853,533 US5241298A (en) 1992-03-18 1992-03-18 Electrically-and-magnetically-coupled, batteryless, portable, frequency divider

Publications (2)

Publication Number Publication Date
DE69303204D1 true DE69303204D1 (de) 1996-07-25
DE69303204T2 DE69303204T2 (de) 1997-02-20

Family

ID=25316289

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69303204T Expired - Lifetime DE69303204T2 (de) 1992-03-18 1993-03-10 Tragbarer, batterieloser Frequenzteiler mit magnetischer und elektrischer Kupplung

Country Status (8)

Country Link
US (1) US5241298A (de)
EP (1) EP0561559B1 (de)
JP (1) JP3293936B2 (de)
AT (1) ATE139638T1 (de)
AU (2) AU656259B2 (de)
CA (1) CA2091728C (de)
DE (1) DE69303204T2 (de)
NO (1) NO930935L (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5231265A (en) * 1990-09-28 1993-07-27 Balance Dynamics Corporation Method and apparatus for the transfer of electrical power to a balancer
EP0561560A1 (de) * 1992-03-18 1993-09-22 Security Tag Systems, Inc. Frequenzteiler mit variabler Kapazität
US5317330A (en) * 1992-10-07 1994-05-31 Westinghouse Electric Corp. Dual resonant antenna circuit for RF tags
US5604485A (en) * 1993-04-21 1997-02-18 Motorola Inc. RF identification tag configurations and assemblies
DE69422682T2 (de) * 1993-10-26 2000-08-10 Texas Instruments Deutschland Antennenschaltung
SE508322C2 (sv) * 1994-02-07 1998-09-28 Leif Aasbrink Larmelement
US5446447A (en) * 1994-02-16 1995-08-29 Motorola, Inc. RF tagging system including RF tags with variable frequency resonant circuits
US5661470A (en) * 1994-03-04 1997-08-26 Karr; Gerald S. Object recognition system
IT1271382B (it) * 1994-05-31 1997-05-27 Alessandro Manneschi Rivelatore di metalli per controllo accessi combinato in forma integrata con rivelatore a trasponder
JP3468436B2 (ja) * 1994-09-22 2003-11-17 豊田紡織株式会社 樹脂製エアクリーナ
US5517179A (en) * 1995-05-18 1996-05-14 Xlink Enterprises, Inc. Signal-powered frequency-dividing transponder
US6208235B1 (en) 1997-03-24 2001-03-27 Checkpoint Systems, Inc. Apparatus for magnetically decoupling an RFID tag
ITTO980146A1 (it) * 1998-02-25 1999-08-25 Alessandro Manneschi Sistema rivelatore per controllo di accesso e relativo gruppo rivela- tore.
GB9815120D0 (en) * 1998-07-14 1998-09-09 Clan Holdings Ltd Battery-less transponder circuit
US6072383A (en) * 1998-11-04 2000-06-06 Checkpoint Systems, Inc. RFID tag having parallel resonant circuit for magnetically decoupling tag from its environment
US7155973B2 (en) * 2003-07-08 2007-01-02 Stephen William Dyer Method and apparatus for balancing
US6400271B1 (en) * 2000-03-20 2002-06-04 Checkpoint Systems, Inc. Activate/deactiveable security tag with enhanced electronic protection for use with an electronic security system
CN1236408C (zh) * 2000-05-08 2006-01-11 关卡系统股份有限公司 无线频率检测和识别系统
GB0921872D0 (en) * 2009-12-15 2010-01-27 Isis Innovation Asset detection apparatus and method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906245A (en) * 1973-01-22 1975-09-16 Michael T Shen Graded junction varactor frequency divider circuits employing large division factors
US4314373A (en) * 1976-05-24 1982-02-02 Harris Corporation Passive transmitter including parametric device
GB1599120A (en) * 1978-05-19 1981-09-30 Philips Electronic Associated Detection system
US4481428A (en) * 1981-05-19 1984-11-06 Security Tag Systems, Inc. Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
NL8200138A (nl) * 1982-01-14 1983-08-01 Nedap Nv Detectiestelsel.
US4670740A (en) * 1985-11-04 1987-06-02 Security Tag Systems, Inc. Portable, batteryless, frequency divider consisting of inductor and diode
US5065138A (en) * 1990-08-03 1991-11-12 Security Tag Systems, Inc. Magnetically-coupled two-resonant-circuit, frequency divider for presence-detection-system tag
CA2047559C (en) * 1990-08-03 1999-07-06 Fred Wade Herman Magnetically-coupled, two-resonant-circuit, frequency-division tag
US5065137A (en) * 1990-08-03 1991-11-12 Security Tag Systems, Inc. Magnetically-coupled, two-resonant-circuit, frequency-division tag

Also Published As

Publication number Publication date
AU671932B2 (en) 1996-09-12
NO930935D0 (no) 1993-03-16
CA2091728C (en) 2001-04-03
US5241298A (en) 1993-08-31
NO930935L (no) 1993-09-20
AU7881794A (en) 1995-02-02
JPH0643256A (ja) 1994-02-18
DE69303204T2 (de) 1997-02-20
AU3521893A (en) 1993-09-23
ATE139638T1 (de) 1996-07-15
AU656259B2 (en) 1995-01-27
EP0561559B1 (de) 1996-06-19
CA2091728A1 (en) 1993-09-19
JP3293936B2 (ja) 2002-06-17
EP0561559A1 (de) 1993-09-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: SENSORMATIC ELECTRONICS CORP. (N.D.GES.D. STAATES

8328 Change in the person/name/address of the agent

Free format text: DERZEIT KEIN VERTRETER BESTELLT

8327 Change in the person/name/address of the patent owner

Owner name: SENSORMATIC ELECTRONICS CORPORATION, EXETER, N.H.,