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NATURALLY SAMPLED PAM

 In natural sampling the pulse has a
  finite width .

 Natural sampling is some times
  called chopper sampling because
  the waveform of the sampled signal
  appears to be chopped off from the
  original signal waveform.

 The sampled signal is obtained by
  multiplication of the modulating signal
  and a train of periodic pulses of width 
  and frequency equal to fs Hz.
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