A phase-locked loop can be used as
A) an oscillator.
B) a voltage regulator.
C) an FM demodulator.
D) a multiplexer.

Question

Quizplus · Accepted Answer

A phase-locked loop can be used as an FM demodulator. It works by comparing the phase of a received FM signal with a local oscillator signal, and using feedback to lock the local oscillator to the correct frequency and phase. While a PLL can also be used as an oscillator or a voltage regulator, these are not its primary applications. A PLL is not used as a multiplexer.

A Phase-Locked Loop Can Be Used as