Battery-powered radio communication apparatus capable of prolong

Details Battery-powered radio communication apparatus capable of prolong Battery-powered radio communication apparatus capable of prolong

1985-08-13

1987-11-24

Ng, Jin P.

Telecommunications

Transmitter

With feedback of modulated output signal

455 73, 455127, 330297, 330298, 330207P, H04B 104, H03F 304

Patent

active

047094044

ABSTRACT:
A battery-powered radio communication apparatus is disclosed which comprises a power amplifier and a power detector for detecting the output power of the power amplifier. A supply voltage detector compares a standard voltage with the output voltage of a battery supplying power to the power amplifier. A gain control circuit controls the gain of the power amplifier in response to the output of the power amplifier and to the output of the supply voltage detector so as to prolong, by a certain time, the communicable state of the apparatus prior to battery depletion.

REFERENCES:
patent: 4114108 (1978-09-01), Faulkenberry et al.
patent: 4158180 (1979-06-01), Challen
patent: 4199723 (1980-04-01), Cummings et al.
patent: 4353037 (1982-10-01), Miller
patent: 4392245 (1983-07-01), Mitama
patent: 4521912 (1985-06-01), Franke et al.
patent: 4636741 (1987-01-01), Mitzlaff
patent: 4654882 (1987-03-01), Ikeda

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