MCQ
In the given detector circuit, the suitable value of carrier frequency is
- ✓$<< 109\, Hz$
- B$<< 105\, Hz$
- C$>> 109\, Hz$
- DNone of these
✓
Answer
Correct option: A.
$<< 109\, Hz$
a
(a) Using $\frac{1}{{{f_{carrier}}}} < < RC$
We get time constant, $RC = 1000 \times {10^{ - 12}} = {10^{ - 9}}s$
Now $\nu = \frac{1}{T} = \frac{1}{{{{10}^{ - 9}}}} = {10^9}Hz$
Thus the value of carrier frequency should be much less than ${10^9}Hz,$ say $100 \,kHz$.
(a) Using $\frac{1}{{{f_{carrier}}}} < < RC$
We get time constant, $RC = 1000 \times {10^{ - 12}} = {10^{ - 9}}s$
Now $\nu = \frac{1}{T} = \frac{1}{{{{10}^{ - 9}}}} = {10^9}Hz$
Thus the value of carrier frequency should be much less than ${10^9}Hz,$ say $100 \,kHz$.
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