Gain control circuit

Details Gain control circuit Gain control circuit

1987-07-17

1988-06-14

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358169, H04N 552

Patent

active

047515775

ABSTRACT:
A gain control circuit includes first and second clamping circuits each of which has a DC shift circuit and a comparator comprising the output of the DC shift circuit with a reference voltage and providing a feedback signal to the respective shift circuit. A peak detector is responsive to the output of the second clamping circuit and is connected with a comparator which outputs a gain control signal to a variable gain device or amplifier located between the clamp circuits and also to the comparators associated with the DC shift circuits for varying the follow-up speeds of the clamping circuits.

REFERENCES:
patent: 4204229 (1980-05-01), Heuze
patent: 4318129 (1982-03-01), Zwirn
patent: 4378569 (1983-03-01), Dallas, Jr. et al.
patent: 4470067 (1984-09-01), Mino

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