Amplifier bias control system

Details Amplifier bias control system Amplifier bias control system

1994-06-27

1995-07-04

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including gain control means

330136, H03G 320

Patent

active

054304105

ABSTRACT:
A system for controlling the bias of an amplifier samples a fraction of the amplified input signal, attenuates the sampled signal, detects the attenuated signal, compares the detected voltage with a reference voltage and supplies a logic level, receives this logic level and generates a control signal applied to the signal attenuator so that the detected voltage is substantially equal to the reference voltage, and generates the bias signal. The bias signal generator receives the control signal from the control signal generator. The bias of the amplifier is the lowest possible commensurate with amplification of the input signal without clipping.

REFERENCES:
patent: 3918003 (1975-11-01), Seidel
patent: 5208550 (1993-05-01), Iwane

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