. Given below is a circuit diagram of an AM demodulator.


For good demodulation of AM signal of carrier frequency f, the value of RC should be :

circuit diagram

 

Best Answer

Answer: (d)

Solution: From the modulated signal, we can demodulate or detect the modulating or message signal by using a diode and a suitable capacitor filter. The AM signal given to the input of the circuit appears at the output of the diode as a rectified wave as shown

For good demodulation of AM signal the value of RC (which is a time-constant) is chosen such that

<<RC or RC >>

Where f is the frequency of the carrier signal.

 

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