Q. 38 A message signal 
cospt modulates the carrier 
to produce an AM signal. For demodulating the generated AM signal using an envelope detector, the time constant RC of the detector circuit should satisfy
(A) 0.5 ms < RC < 1 ms
(B) 1 μs << RC < 0.5 ms
(C) RC << μs
(D) RC >> 0.5 ms
Answer: B
Explanation:
