Schmitt trigger circuit in PWM signal reception

In PWM signal reception, the Schmitt trigger circuit is used

Options:

a) to remove noise
b) to produce ramp signal
c) for synchronization
d) none of the above

Correct Answer: to remove noise

Explanation:

In pulse width modulation, the width of the carrier varies with the amplitude of the modulating signal at the time of sampling. In PWM signal reception, the received PWM signal is applied to the Schmitt trigger circuit. The Schmitt trigger circuit is used to remove noise in the PWM waveform. This output is the supplied further for detection of the original information.