Which components of an FM receiver are fundamentally different from those of an AM receiver?

The distinction between an FM receiver and an AM receiver is rooted in the different processes they utilize to extract audio signals from carrier waves. In FM (Frequency Modulation) receivers, components such as the discriminator and limiter play specific roles that are not present in AM (Amplitude Modulation) receivers.

The discriminator is a device that converts frequency variations in the received FM signal back into amplitude variations, which can then be converted to audio. This conversion process is essential in FM systems, as FM encoding works by varying the frequency of the carrier wave in accordance with the audio signal. The limiting function in the FM receiver ensures that the variations in amplitude (caused by noise) do not affect the output audio signal quality. This is critical in FM systems, as it enhances the resistance to noise and allows for clearer audio reproduction.

AM receivers, on the other hand, do not use a discriminator or a limiter. They rely on different methods of demodulation that focus on detecting changes in amplitude rather than frequency. Therefore, the presence of a discriminator and limiter in FM receivers fundamentally differentiates them from AM receivers, highlighting the unique approach that FM technology takes to maximize audio quality and minimize noise.

In this context, while other components like amplifiers and oscillators serve important