Demodulator

Diode demodulation for AM

Diode demodulation for AM
  1. How do you demodulate an AM signal?
  2. What demodulator is used for AM?
  3. Why diode is used for amplitude demodulation?

How do you demodulate an AM signal?

An AM radio signal can be demodulated by rectifying it to remove one side of the carrier, and then filtering to remove the radio-frequency component, leaving only the modulating audio component. This is equivalent to peak detection with a suitably long time constant.

What demodulator is used for AM?

Square law demodulator is used to demodulate low level AM wave. Following is the block diagram of thesquare law demodulator. This demodulator contains a square law device and low pass filter. The AM wave V1(t) is applied as an input to this demodulator.

Why diode is used for amplitude demodulation?

The AM diode detector is an envelope detector – it provides an output of the envelope of the signal. As such the diode detector or demodulator is able to provide an output proportional to the amplitude of the envelope of the amplitude modulated signal.

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