Transmission output control circuit

Details Transmission output control circuit Transmission output control circuit

1991-08-06

1993-05-25

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

330129, 455116, 455126, H03G 320

Patent

active

052143937

ABSTRACT:
In a radio transmitter, a part of an output of a transmission output amplifying circuit is supplied to a variable attenuating circuit and an output of the variable attenuating circuit is supplied to a detecting circuit. An output of the detecting circuit and a reference voltage are compared and a control voltage is given to the transmission power amplifying circuit in accordance with the result of the comparison, thereby controlling the transmission output. By controlling the attenuation amount of the variable attenuating circuit, the transmission output can be controlled over a wide dynamic range with a high reproducing fidelity.

REFERENCES:
patent: 4392245 (1983-07-01), Mitama
patent: 4476437 (1984-10-01), Fujiwara
patent: 4523155 (1985-06-01), Walczak et al.
patent: 4602218 (1986-07-01), Vilmur et al.
patent: 5126686 (1992-06-01), Tam

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