Phase-locked-loop circuit for radio transceiver

Details Phase-locked-loop circuit for radio transceiver Phase-locked-loop circuit for radio transceiver

1991-11-25

1994-01-04

Ng, Jin F.

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

455 78, 455265, 331 2, 331 14, H04B 140, H04B 700, H03L 700

Patent

active

052769135

ABSTRACT:
A phase-locked-loop circuit for a radio transceiver operative to transmit and to receive modulated signals during nonconcurrent time periods. During time periods in which the radio transceiver is to generate and to transmit a modulated signal, the phase-locked-loop circuit is connected to the transmitter portion of the transceiver. During time periods in which the radio transceiver is to receive a modulated signal, the phase-locked-loop circuit is connected to the receiver portion of the transceiver. A switch, preferably comprised of a multiplexer, alternately connects the phase-locked-loop with the transmitter portion and the receiver portion of the transceiver.

REFERENCES:
patent: 3764912 (1973-10-01), Abraham et al.
patent: 4061973 (1977-12-01), Reimers et al.
patent: 4777655 (1988-10-01), Numata et al.

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