Micropower RF transponder with superregenerative receiver and RF

Details Micropower RF transponder with superregenerative receiver and RF Micropower RF transponder with superregenerative receiver and RF

1994-09-06

1997-05-13

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

455318, 455336, 455 84, 329344, 329323, H04B 116

Patent

active

056302169

ABSTRACT:
A micropower RF transdponder employs a novel adaptation of the superregenerative receiver wherein the quench oscillator is external to the regenerative transistor. The quench oscillator applies an exponentially decaying waveform rather than the usual sinewave to achieve high sensitivity at microampere current levels. Further improvements include circuit simplifications for antenna coupling, extraction of the detected signal, and a low-voltage bias configuration that allows operation with less than a 1-volt rail voltage. The inventive transponder is expected to operate as long as the battery shelf life.

REFERENCES:
patent: 3054056 (1962-09-01), Yost, Jr.
patent: 4143324 (1979-03-01), Davis
patent: 4307465 (1981-12-01), Geller
patent: 4393514 (1983-07-01), Minakuchi
patent: 4455682 (1984-06-01), Masters
patent: 4749964 (1988-06-01), Ash
patent: 4786903 (1988-11-01), Grindahl et al.
patent: 5029271 (1991-07-01), Meierdierck

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