Automatic gain control circuit having a control loop including a

Details Automatic gain control circuit having a control loop including a Automatic gain control circuit having a control loop including a

1988-04-07

1989-03-14

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358179, 330254, 455245, H04N 552

Patent

active

048129089

ABSTRACT:
An automatic gain control circuit having different control loops which must each be controlled in a different control current range by one and the same control current, includes a current threshold circuit having an input to which a threshold current source (7) and the emitters of a complementary transistor pair are connected so that the collector current of each transistor can control a control loop.

REFERENCES:
patent: 2773121 (1956-12-01), Janssen
patent: 3487163 (1969-12-01), Brugler

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