Q. In a diode AM-detector, the output circuit consists of $R = 1\ k\Omega$ and $C = 10\ pF$. A carrier signal of $100\ kHz$ is to be detected. Is it good
A) Yes
B) No
C) Information is not sufficient
D) None of these
Explanation
(b) For demodulation $\frac{1}{f_{c}} < < RC$
$\frac{1}{f_{c}} = \frac{1}{100 \times 10^{3}} = 10^{- 5}s$
$RC = 10^{3} \times 10 \times 10^{- 12}s = 10^{- 8}s$
We see that $\frac{1}{f_{c}}$ here is not less than $RC$ as required by the above condition. Hence, this is not good
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.