Duplex transceiver arrangements for rebroadcast of signals

Details Duplex transceiver arrangements for rebroadcast of signals Duplex transceiver arrangements for rebroadcast of signals

1980-06-02

1982-10-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

455 24, H04J 100, H04L 514

Patent

active

043531270

ABSTRACT:
A duplex transceiver comprises a receiver aerial and a transmitter aerial, a pair of balanced mixers each fed from the transmitter aerial and from the receiver aerial, a phase quadrature device interposed in a signal path between one of the aerials and a first one of the balanced mixers, a multiplier fed from the mixers, an oscillator/modulator arrangement feeding the transmitter aerial and phased locked to the frequency of a received carrier signal by means of a phase control signal fed from the multiplier, a first phase detector fed from that first one of the balanced mixers which is fed via the phase quadrature device, a delay device via which the said first phase detector is fed from a second one of the balanced mixers, thereby to provide a control signal which is fed back to control the balance of the first balanced mixer, and a second phase detector fed from the second balanced mixer with an undelayed signal and, via the delay device, with a delay signal from the first one of the balanced mixers, thereby to produce a second control signal which is fed back to control the balance of the second balanced mixer, from which an output signal from the transceiver is derived. Alternative AM and FM embodiments are disclosed.

REFERENCES:
patent: 3696429 (1972-10-01), Tressa

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