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InterviewSolution
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A message signal `m(t)=4cos2000pit` modulates the carrier `C(t)=cos2pif_(c)t` where `f_(c)=1MHz` to produce an `AM` signal. For demodulation using envelope detector the time constant `RC` should satisfyA. `0.5ms lt RC lt 1ms`B. `1mus lt lt RC lt lt 1ms`C. `RC gt gt 1mus`D. `RC gt gt 1mus` |
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Answer» Correct Answer - B `f_(c)=1 MHz` and `f_(m)=2000Hz` `(1)/(f_(c)) lt lt RC lt lt (1)/(f_(m))` |
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