Anticipatory automatic gain control circuit

Details Anticipatory automatic gain control circuit Anticipatory automatic gain control circuit

1989-10-31

1992-04-21

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307264, 307493, 307494, 307555, 330 85, 330136, 330279, H03K 508, H03K 502, H03G 330

Patent

active

051071401

ABSTRACT:
An apparatus for automatically adjusting the gain of amplifiers receiving the detected light signal from a bar code scanner. The apparatus causes all signals input to the signal processing circuitry to have the same gain. The anticipatory automatic gain control circuit determines the gain from a maximization of the amplitude of an input signal and a time-delayed copy of the input signal. The gain control signal thus developed is used to identically control the gains of both a first variable-gain amplifier circuit which receives the maximized amplitude signal and a second variable-gain amplifier circuit which receives only the time-delayed copy of the input signal.

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