Amplitude limiter in FM receivers

Amplitude limiter in FM receivers are used to

Options:

a) Remove amplitude variations due to noise
b) Filteration
c) Demodulation
d) Amplification

Correct Answer: a.) Remove amplitude variations due to noise

Explanation:

Amplitude limiter in FM receivers are used to remove the amplitude variations. The limiter does this by clipping the received modulated wave. In FM signal the frequency of the carrier is varied. So if there are any variations in the amplitude of the received wave, it is due to noise or interference in the communication channel. So these amplitude variations are remover by the amplitude limiters.