Communication apparatus utilizing high power amplifier

Details Communication apparatus utilizing high power amplifier Communication apparatus utilizing high power amplifier

1995-01-04

1995-11-28

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

330136, H04B 104

Patent

active

054716560

ABSTRACT:
A communication apparatus is small in power consumption and suitable for use in a portable radio communication apparatus. The communication apparatus includes a semiconductor power amplifier integrated circuit which uses a GaAs junction type FET having a gate bias terminal to which a gate bias voltage is applied. The integrated circuit decreases its amount of power consumption in a manner that the integrated circuit is operated to perform an amplification operation during a communication operation and not operated when a communication is interrupted or a time slot is not allotted to the communication apparatus itself. A detector detects a portion of a high-frequency signal to the amplifier circuit to provide an input to a gate bias generator which provides an input to an adder circuit, the output of which controls the bias on the power amplifier.

REFERENCES:
patent: 4456889 (1984-06-01), Kumar
patent: 4574248 (1986-03-01), Snodgrass
patent: 4686387 (1987-08-01), Rumelhard
patent: 5083096 (1992-01-01), Miyazaki
patent: 5087836 (1992-02-01), Taylor
patent: 5164679 (1992-11-01), Dittmer
patent: 5179353 (1993-01-01), Miyake
patent: 5216379 (1993-06-01), Hamley
patent: 5220290 (1993-06-01), Black
patent: 5235289 (1993-08-01), Kunitomo
patent: 5278997 (1994-01-01), Martin
EPO search report and annex Patent Abstracts of Japan; Apr. 6, 1992.

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