Advantages of PWM

In pulse width modulation,

Options:

a) synchronization is not required between transmitter and receiver
b) amplitude of the carrier pulse is varied
c) instantaneous power at the transmitter is constant
d) none of the above

Correct Answer: synchronization is not required between transmitter and receiver

Explanation:

In pulse width modulation, the width of the carrier varies with the amplitude of the modulating signal at the time of sampling. Pulse width modulation is a type of Pulse Time Modulation. As there is no variation in the amplitude of the carrier, the noise may be easily removed at the receiver. It does not require synchronization between the transmitter and the receiver.