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Which among the following can be detected by an envelope detector?

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in Physics – Class 12 by (135k points)
Which among the following can be detected by an envelope detector?

(a) Low frequency AM waves

(b) Very low frequency AM waves

(c) Envelope detectors cannot detect AM waves

(d) High frequency AM waves

I have been asked this question in an online interview.

Origin of the question is Communication Systems in section Communication Systems of Physics – Class 12

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Correct option is (d) High frequency AM waves

Explanation: An envelope detector is used to detect high-frequency amplitude modulated (AM) waves. It takes high-level AM waves as input and then provides an output that can be considered as an envelope of the original signal. An envelope detector may consist of a simple RC circuit.

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