PLL as a FM demodulator

Phase-locked loop can be used as

Options:

FM demodulator
AM demodulator
FM receiver
AM receiver

Correct Answer: FM demodulator

Explanation:

PLL or Phase Locked Loop is used as a FM demodulator. It is a high performance FM detector due to its key advantages such as Linearity and low manufacturing costs.

The increase or decrease in the frequency around the carrier frequency is termed as

Options:

Figure factor
Frequency deviation
Modulation index
Frequency spectrum

Correct Answer: Frequency deviation

Explanation:

In FM, as the amplitude of the modulating signal changes, the frequency of the carrier changes from its central frequency. This is known as Frequency Deviation.