Question

In a diode AM detector with the output circuit consists of R=`1M Omega` and `C=1 pF` would be more suitable for detecting a carrier signal of
A. 1MHz
B. 0.1 MHz
C. 0.5MHz
D. 10MHz

Answer 1

Correct Answer - D
Here, `RC=10^(6)xx10^(-12)=10^(-6)s`
for demodulation, `(1)/(v_(c)ltltRC`
`v _(c)=(1)/(RC)` or `v_(c)gtgt(1)/(10^(6))=10^(6)Hz`.
`therefore v_(c)gtgt10^(6)Hz`