Remotely interrogated transponder

Details Remotely interrogated transponder Remotely interrogated transponder

1987-06-01

1988-11-22

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

331117FE, H04Q 700, H03B 512

Patent

active

047869038

ABSTRACT:
A radio frequency transponder is provided that combines high signal sensitivity in the receive mode and variable frequency capability in the transmit mode in a low component and power efficient design. A single tuned amplifier acts as the externally quenched oscillator of a superregenerative receiver when the transponder is operated in the receive mode, and as the carrier frequency generator when the transponder is operated in the transmit mode.

REFERENCES:
patent: 3750167 (1973-07-01), Gehman et al.
patent: 3918057 (1975-11-01), Van Tol
patent: 4085364 (1978-04-01), Kakigi
patent: 4511861 (1985-04-01), Bell
patent: 4614945 (1986-09-01), Brunius
patent: 4616193 (1986-10-01), Meyer
patent: 4660002 (1987-04-01), Iijima et al.
patent: 4670722 (1987-06-01), Rauscher
patent: 4684904 (1987-08-01), Watkins et al.

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