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The noise performance of a square law demodulator of AM signal is ___________

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The noise performance of a square law demodulator of AM signal is ___________

(a) Identical with that of a synchronous detector

(b) Better than that of an envelope detector

(c) Better than that of a synchronous detector

(d) Poorer than that of an envelope detector

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This interesting question is from Threshold Effect in FM topic in section Noise of Analog Communications

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Right answer is (c) Better than that of a synchronous detector

The explanation is: The noise performance of a square law demodulator of AM signal is better than that of a synchronous detector.

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