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Question: Answered & Verified by Expert
Given below is the circuit diagram of an AM demodulator. For good demodulation of AM signal of carrier frequency $f$, the value of $R C$ should be

PhysicsAlternating CurrentAIIMSAIIMS 2006
Options:
  • A $R C=1 / f$
  • B $R C < 1 / f$
  • C $R C \geq 1 / f$
  • D $R C \gg 1 / f$.
Solution:
2828 Upvotes Verified Answer
The correct answer is: $R C \gg 1 / f$.
For good demodulation,
$$
\frac{1}{f} \ll R C \text { or, } R C \gg \frac{1}{f} \text {. }
$$

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