Remote wireless switch sensing circuit using RF transceiver in c

Details Remote wireless switch sensing circuit using RF transceiver in c Remote wireless switch sensing circuit using RF transceiver in c

1997-03-28

2000-11-07

Zimmerman, Brian

Communications: electrical

Selective

Interrogation response

340 1042, 340 1034, H04Q 100

Patent

active

061442887

ABSTRACT:
A circuit assembly senses a state of a variable state device, wherein a data signal representative of the state is communicated via wireless telegraphy. A surface acoustic wave (SAW) device, having a plurality of interdigital transducers (IDTs) comprises a wave launching IDT and a state information IDT, wherein the plurality of IDTs are in acoustical communication and the state information IDT is in electrical communication with an antenna through the variable state device. An RF transceiver communicates a trigger signal to the SAW device, wherein the trigger signal causes a launching of a SAW wave from the wave launching IDT towards the state information IDT. The state information IDT generates a signal pulse in response thereto and communicates the pulse to the antenna through the variable state device. A transceiver control module, in operative communication with the RF transceiver enables communication of the trigger signal and reads the data signal, wherein the trigger signal and data signal are communicated between the RF transceiver in the SAW device via wireless telegraphy.

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James R. McColl and Joanne M. Browne, GTE Laboratories, Incorporated, William C. Knoll, GTE Products Corporation, Paper No. 90072 Entitled Simple, Passive, Non-Contact Class A Multiplexing Method Using Programmable Surface Acoustic Wave Devices. No month. No year.
Physical Sciences Directorate, Army Research Laboratory, Fort Monmouth, New Jersey, May 1996, Passive SAW ID Tag With Processing Gain for Extended Range.

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