The AGC control voltage:
A) varies as the signal strength of the received signal varies.
B) is actually the dc voltage component produced by the mixing action in the AM demodulator stage.
C) a negative feedback voltage.
D) is produced by an RC circuit having a much larger time constant than that of the detector.
E) all of the above

Question

Quizplus · Accepted Answer

The AGC (Automatic Gain Control) control voltage varies with the signal strength of the received signal to maintain a constant output level, is produced by the mixing action in the AM demodulator stage as a DC component, acts as a negative feedback voltage to adjust the gain of the receiver, and is generated by an RC circuit with a large time constant to ensure smooth operation without responding to momentary signal changes.

The AGC Control Voltage