GATE Electronics and Communications (EC) 2011 Solved Paper

Question : 48 of 65

Marks: +1, -0

A message signal

m (t) \: = \:cos2000π t + 4cos\:4000π t

modulates the carrier

c (t) = cos2π f_{c}t

where fc = 1 MH_z to produce AM. For demodulating the generated AM signal using an envelope defector, the time constant RC of the defector should satisfy

0.5 < RC < 1 ms
1μs ≪ RC < 0.5 ms
RC ≪ 1μs
RC > 0.5 ms

Validate

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