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In automatic gain control of the AM receiver ________(a) gain of the receiver is adjusted(b) gain adjustment depends upon the strength of received signal(c) is an open-loop system(d) gain is received only by stronger signalsThis question was posed to me by my college professor while I was bunking the class.My question is taken from Amplitude Limiting topic in division Receivers & Transducers of Analog Communications

Answer»

Correct answer is (a) GAIN of the receiver is adjusted

To explain I would say: Automatic Gain Control provides controlled signal amplitude at the output EVEN if there are amplitude VARIATIONS at the INPUT. This controlled output ADJUSTS the input to output gain to a suitable value.



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