Signal transceiver

Details Signal transceiver Signal transceiver

2005-07-05

2005-07-05

Nguyen, Lee (Department: 2682)

Telecommunications

Transmitter and receiver at separate stations

Near field

C235S487000, C340S010100

Reexamination Certificate

active

06915108

ABSTRACT:
A signal transceiver for transmitting a carrier signal to a transponder and receiving a modulated data signal returned by the transponder is provided. The signal transceiver includes a transistor with a base, a collector and an emitter, a controller being electrically connected to the base and providing a controlling signal for turning on the transistor, an oscillation source being electrically connected to the collector for providing the carrier signal, a capacitor being electrically connected to the base and the oscillation source for forming an oscillation circuit, and a resonator being electrically connected to the collector for transmitting the carrier signal to the transponder and receiving the modulated data signal returned by the transponder, and outputting a demodulated data signal through the emitter.

REFERENCES:
patent: 4814595 (1989-03-01), Gilboa
patent: 4931788 (1990-06-01), Creswick
patent: 5302954 (1994-04-01), Brooks et al.
patent: 5541604 (1996-07-01), Meier
patent: 5866891 (1999-02-01), Fujimoto et al.

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