Question

A phase locked loop can be employed for demodulation of

• A. pulse amplitude modulation signal
• B. pulse code modulation signal
• C. frequency modulation signal
• D. signal side band amplitude modulation signals

Hint:

PLLs are ideal for FM demodulation due to their ability to track frequency variations.

Answer 1

The Correct Option is C

A Phase Locked Loop (PLL) is a feedback system that locks the phase of a local oscillator to the phase of an incoming signal. In communication systems, PLLs are widely used for demodulating Frequency Modulated (FM) signals, where the instantaneous frequency of the input is tracked and converted to a corresponding voltage level.