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Which of the following stage is present in FM receiver but not in AM receiver?

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Which of the following stage is present in FM receiver but not in AM receiver?

(a) Amplitude limiter

(b) Demodulator

(c) AM amplifier

(d) Mixer

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This intriguing question comes from Generation of DSBSC Waves in portion Double Sideband Suppressed Carrier Modulation of Analog Communications

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Correct answer is (a) Amplitude limiter

Explanation: Amplitude Limiter circuit is used in FM receiver to remove the noise or any variation in amplitude present in the received signal. Thus, the output of the amplitude limiter has a constant amplitude. So it is only used in frequency modulation and not in amplitude modulation.

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