automatic gain control

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Related to AGC circuit: Automatic volume control

automatic gain control

[¦ȯd·ə¦mad·ik ′gān kən‚trōl]
(electronics)
A control circuit that automatically changes the gain (amplification) of a receiver or other piece of equipment so that the desired output signal remains essentially constant despite variations in input signal strength. Abbreviated AGC.
References in periodicals archive ?
Blinking jammers can upset the AGC circuits in the radar causing the receiver to be alternatively saturated and desensitized below the noise level.
Effectively, these equalizers are AGC circuits designed and implemented in digital signal processors, which can remove the deep amplitude notches that would otherwise occur.
The DTA8042 provides the IF mixers and the AGC circuits required to generate separate in-phase and quadrature baseband signals.