Question

In the given detector circuit, the suitable value of carrier frequency is:-

• A. $<<{10}^{9}Hz$
• B. $<<{10}^{5}Hz$
• C. $>>{10}^{9}Hz$
• D. None of these

Answer 1

The correct option is A $<<{10}^{9}Hz$

Using $\frac{1}{f_{carrier}}<<RC$ ,
We get time constant $RC=1000\times {10}^{-12}={10}^{-9}s$ ,
Now $v=\frac{1}{T}=\frac{1}{{10}^{-9}}Hz$ ,
Thus , the value of carrier frequency should be much less than ${10}^{9}Hz$, say $100Hz$