1
Josef H Schuermann, Guenter Heinecke, Rudolf Kremer: Transponder arrangement. Texas Instruments Deutschland, James C Kesterson, James T Comfort, Melvin Sharp, October 1, 1991: US05053774 (522 worldwide citation)

A transponder arrangement is described comprising an interrogation unit (10) which sends an RF interrogation pulse to at least one responder unit (12). The responder unit (12) then transmits back data stored therein in the form of a modulated RF carrier to the interrogation unit (10). In the respond ...


2
Josef H Schuermann: High speed read/write AVI system. Texas Instruments Incorporated, Brian C McCormack, James C Kesterson, Richard L Donaldson, February 15, 1994: US05287112 (241 worldwide citation)

A transponder (14) for communicating with an interrogator (12) has a high Q-factor resonant circuit (34) of frequency f.sub.1 for receiving RF powering signals. The transponder also has a tuning circuit (56,58) which when in electrical communication with the resonant circuit (34) is operable to form ...


3
Josef H Schuermann: Integrated vehicle communications system. Texas Instruments Deutschland, Bret J Petersen, James C Kesterson, Richard L Donaldson, September 3, 1996: US05552789 (230 worldwide citation)

An integrated vehicle communications system for on-board use within a vehicle which may also communicate with external portions of the system which includes miniaturized, self-contained read/write transponders 20, 22, 30 of the type disclosed in Schuermann U.S. Pat. No. 5,053,774, for providing func ...


4
Josef H Schuermann: High speed read/write AVI system. Texas Instruments Deutschland, Brian C McCormack, James C Kesterson, Richard L Donaldson, December 20, 1994: US05374930 (227 worldwide citation)

A transponder (14) for communicating with an interrogator (12) has a high Q-factor resonant circuit (34) of frequency f.sub.1 for receiving RF powering signals. The transponder also has a tuning circuit (56,58) which when in electrical communication with the resonant circuit (34) is operable to form ...


5
Josef H Schuermann: Electronic transponder tuning circuitry. Texas Instruments Incorporated, Brian C McCormack, James C Kesterson, Richard L Donaldson, February 13, 1996: US05491484 (147 worldwide citation)

A method is disclosed herein for tuning a responder unit (12). The method comprises the stops of storing energy in a responder unit energy accumulator (136) in a contactless fashion by RF energy transmitted from the interrogator unit (10) to the responder unit (12), and exciting within the responder ...


6
Josef H Schuermann: Frequency diversity transponder arrangement. Texas Instruments Deutschland, Brian C McCormack, James C Kesterson, Richard L Donaldson, September 13, 1994: US05347280 (131 worldwide citation)

A method of communicating between a transponder and an interrogator. The interrogator (10) transmits a wireless RF interrogation which is received by the transponder (12). The transponder (12) then transmits a wireless RF response. The wireless RF response has a first channel response centered at fr ...


7
Josef H Schuermann: Interrogator for detecting adjacent transponders. Texas Instruments Deutschland, Brian C McCormack, James C Kesterson, Richard L Donaldson, August 27, 1996: US05550548 (110 worldwide citation)

A method for interrogating remote transponders having the steps of: sending an RF interrogation pulse from an interrogator (10), receiving by a first and second transponder (12,12a) the RF interrogation pulse, and establishing in a resonant circuit (130) of each of the transponders (12,12a) an oscil ...


8
Josef H Schuermann: Method of providing a synchronized data stream suitable for use in a combined FDX and HDX RF-ID system. Texas Instruments Deutschland, James C Kesterson, Richard L Donaldson, William E Hiller, August 6, 1996: US05543798 (95 worldwide citation)

In a method for transmitting a data message comprising a synchronization section and a data section stored in a transponder device (10) to an interrogating device (12) in full duplex mode. The interrogating device (12) continuously emits an interrogating command, the receipt of which in the transpon ...


9
Gerhard Eberth, Josef H Schuermann: Device for controlling discharge of a charge capacitor in a transponder. Texas Instruments Incorporated, Rebecca A Mapstone, James C Kesterson, Richard L Donaldson, March 4, 1997: US05608406 (83 worldwide citation)

A transponder device (10) includes a discharge circuit (18) to control the discharge of voltage from a charge capacitor (14). The discharge circuit (18) prevents transmission of a data telegram by the transponder device (10) until a voltage of the charge capacitor (14) reaches a threshold voltage le ...


10
Andreas Hagl, Josef H Schuermann: Method and apparatus for transfering information from a transponder. Texas Instruments Incorporated, Rebecca Mapstone Lake, James C Kesterson, Richard L Donaldson, November 24, 1998: US05841364 (80 worldwide citation)

A transponder unit (10) includes an N cycle counter (30) and an M cycle counter (28). The N cycle counter (30) has a different cycle value than the M cycle counter (28). During the transmission of information from the transponder unit (10), the duration for data bits having a binary zero value is co ...