DE69423474T2 - Antwortgerät, Abfragegeräte, Systeme und Verfahren zum Ausschluss von Abfrager-Synchronisations-Erfordernissen - Google Patents

Antwortgerät, Abfragegeräte, Systeme und Verfahren zum Ausschluss von Abfrager-Synchronisations-Erfordernissen

Info

Publication number
DE69423474T2
DE69423474T2 DE69423474T DE69423474T DE69423474T2 DE 69423474 T2 DE69423474 T2 DE 69423474T2 DE 69423474 T DE69423474 T DE 69423474T DE 69423474 T DE69423474 T DE 69423474T DE 69423474 T2 DE69423474 T2 DE 69423474T2
Authority
DE
Germany
Prior art keywords
interrogators
responder
exclude
systems
methods
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
DE69423474T
Other languages
English (en)
Other versions
DE69423474D1 (de
Inventor
Herbert Meier
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.)
Texas Instruments Deutschland GmbH
Original Assignee
Texas Instruments Deutschland GmbH
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 Texas Instruments Deutschland GmbH filed Critical Texas Instruments Deutschland GmbH
Application granted granted Critical
Publication of DE69423474D1 publication Critical patent/DE69423474D1/de
Publication of DE69423474T2 publication Critical patent/DE69423474T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/758—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using a signal generator powered by the interrogation signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation
DE69423474T 1993-09-03 1994-09-01 Antwortgerät, Abfragegeräte, Systeme und Verfahren zum Ausschluss von Abfrager-Synchronisations-Erfordernissen Expired - Lifetime DE69423474T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/117,258 US5541604A (en) 1993-09-03 1993-09-03 Transponders, Interrogators, systems and methods for elimination of interrogator synchronization requirement

Publications (2)

Publication Number Publication Date
DE69423474D1 DE69423474D1 (de) 2000-04-20
DE69423474T2 true DE69423474T2 (de) 2000-09-28

Family

ID=22371843

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69423474T Expired - Lifetime DE69423474T2 (de) 1993-09-03 1994-09-01 Antwortgerät, Abfragegeräte, Systeme und Verfahren zum Ausschluss von Abfrager-Synchronisations-Erfordernissen

Country Status (3)

Country Link
US (1) US5541604A (de)
EP (1) EP0681192B1 (de)
DE (1) DE69423474T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
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DE102010028991A1 (de) * 2009-12-03 2011-06-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Passiver Transponder für ein RFID-System und Verfahren zum Übertragen von Daten von/zu einer Datenquelle eines solchen passiven Transponders
US8847434B2 (en) 2010-02-10 2014-09-30 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Antenna arrangement and transponder reader

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EP0681192B1 (de) 2000-03-15

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