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Consider the amplitude modulated (AM) signal Ac cos ωct + 2 cos ωmt cos ωct For demodulating the signal using envelope detector, the minimum value of Ac should be

Correct Answer: 2

Explanation:

AC cos ωct + 2 cos ωmt cos ωct


AC cosωct


for envelope detection μ < 1 ⇒ < 1 ⇒ Ac should be at least-2.


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