Amplifiers – With semiconductor amplifying device – Including gain control means
Patent
1992-08-05
1994-12-06
Sikes, William L.
Amplifiers
With semiconductor amplifying device
Including gain control means
330285, H03G 310
Patent
active
053714776
ABSTRACT:
A linear amplifier has an input signal controller for controlling the level of an input signal to a field-effect transistor (FET) using a DC gate current measured by a gate current detector arranged between a gate bias terminal and a drain bias terminal of the FET and a nonlinear resistor whose resistance can be varied corresponding to an inter-terminal voltage between the gate and the drain of the FET, in which the voltage at the gate of the FET is adjusted to a rate such that a particular drain current which has been determined just before the starting of burst signal transmission corresponding to the level of a power output of the linear amplifier is obtained, and is maintained for a given period of time.
REFERENCES:
patent: 4096444 (1978-06-01), Fellrath
patent: 4264874 (1981-04-01), Young
patent: 4500848 (1985-02-01), Marchand et al.
patent: 4737733 (1988-04-01), LaPrade
patent: 5051705 (1991-09-01), Moghe et al.
Ikeda Hikaru
Ishizaki Toshio
Kanazawa Kunihiko
Kosugi Hiroaki
Yoshikawa Yoshishige
Matsushita Electric - Industrial Co., Ltd.
Sikes William L.
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