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Envelope detector consists of

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Envelope detector consists of

(a) Rectifier and high pass filter

(b) Rectifier and low pass filter

(c) Amplifier and low pass filter

(d) Amplifier and high pass filter

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Right choice is (b) Rectifier and low pass filter

The explanation: An envelope detector consists of a rectifier and a low pass filter. The detectors are matched to the envelopes and not to the signal themselves.

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