Question

What is the role of amplitude limiter in FM receivers?

Answer 1

Hint: In this question, we need to find the role of amplitude limiter in FM receivers. For this, we will define the amplitude limiter first. After that, we will describe its function in a FM receiver.

Complete step by step solution:
An amplitude limiter is a system that holds the strength of the signal in an FM receiver steady. In FM (Frequency modulation) receivers, amplitude limiters are employed to reduce unwanted amplitude variations produced by noise.

We know that the carrier frequency of FM broadcasts is frequently variable. So, the signal in FM is modulated in the manner of the carrier signal's frequency, thus if the amplitude varies due to noise or disturbance in the channel, it is rectified using a limiter circuit before being sent for demodulation.

Therefore, the role of an amplitude limiter in an FM receiver is to demodulate a signal.

Additional Information: A radio, also known as an FM receiver, is an electrical device that collects radio waves and translates the data delivered by them into a usable form. To capture the required frequency waves, an antenna is utilized. The receiver employs electronic filters to isolate the intended signal from all other signals picked up by the antenna, an electronic amplifier to boost the signal's strength for further analysis, and lastly demodulation to extract the needed information.

Note: Many students make mistakes in understanding the function of the amplitude limiter. They may get confused in determining the function of the FM receiver. This is the only way through which we can solve this example in an easy manner.