Communication System Question 3
Question: In the given detector circuit, the suitable value of carrier frequency is
Options:
A) $ «10^{9}Hz $
B) $ «10^{5}Hz $
C) $ »10^{9}Hz $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Using $ \frac{1}{f _{carrier}}«RC $ We get time constant, $ RC=1000\times {{10}^{-12}}={{10}^{-9}}s $ Now $ V=\frac{1}{T}=\frac{1}{{{10}^{-9}}}=10^{9}Hz $ Thus the value of carrier frequency should be much less than $ 10^{9}Hz $ , say 100 kHz.
BETA
