Transmitter-receiver

Details Transmitter-receiver Transmitter-receiver

1992-12-24

1994-08-16

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

370 32, 375 8, 375104, H04B 140, H04L 514

Patent

active

053393090

ABSTRACT:
A transmitter-receiver is simple in arrangement and can prevent a receiving circuit side from being disturbed; in which one channel is divided to provide a transmission slot and a reception slot. Transmission and reception are effected in the transmission slot and reception slot of one channel in a time division manner and a channel selection frequency synthesizer is commonly used both in the transmitting circuit and the receiving circuit. This transmitter-receiver includes a modulator circuit (40) of the transmitting circuit which has an oscillator (41) for modulating a signal into a predetermined frequency and a multiplier circuit (44) for converting an output signal of the oscillator (41) into a desired intermediate frequency. During the period of the transmission slot, the supply of a voltage to the multiplier circuit 44 is stopped.

REFERENCES:
patent: 4520474 (1985-05-01), Vilmur
patent: 4694466 (1987-09-01), Kadin
patent: 4903257 (1990-02-01), Takeda et al.
patent: 5123008 (1992-06-01), Beesley
International Patent WO 92/20164 (Downey) Nov. 12, 1992.

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