Radio communication apparatus capable of isolating a receiver fr

Details Radio communication apparatus capable of isolating a receiver fr Radio communication apparatus capable of isolating a receiver fr

1993-11-05

1996-01-09

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455 76, 455 78, H04B 140

Patent

active

054836794

ABSTRACT:
In a radio communication apparatus which uses a common carrier frequency on transmission and reception operations selectively carried out in the apparatus, a frequency divider is located between a modulator operated by a predetermined modulation frequency and a modulating local oscillator which oscillates a modulating frequency equal to an integral multiple N of the predetermined modulation frequency. The frequency divider has a frequency division factor equal to N and supplies a frequency divided signal of the predetermined modulation frequency to the modulator during the transmission operation under control of a control circuit. During the reception operation, the frequency divider is put into an inactive state by the control circuit to isolate the modulating local oscillator and the modulator.

REFERENCES:
patent: 5276915 (1994-01-01), Marko et al.
patent: 5309429 (1994-05-01), Fukuda
patent: 5319799 (1994-06-01), Morita
Patent Abstracts of Japan, vol. 16, No. 459 (E-1268), Sep. 24, 1992.

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