* Superheterodyne receivers are the most common type of FM receiver. They use a superheterodyne circuit to convert the incoming FM signal to a lower frequency, which is then amplified and demodulated. Superheterodyne receivers are typically more sensitive and selective than other types of FM receivers.
* Direct-conversion receivers are a newer type of FM receiver that uses a direct-conversion circuit to demodulate the incoming FM signal. Direct-conversion receivers are typically less expensive and more compact than superheterodyne receivers, but they are also less sensitive and selective.
In addition to these two main types of FM receivers, there are also a number of other less common types of FM receivers, such as:
* Tuned-radio-frequency (TRF) receivers are the simplest type of FM receiver. They use a series of tuned circuits to select the desired FM signal, which is then amplified and demodulated. TRF receivers are not very sensitive or selective, but they are simple to build and operate.
* Regenerative receivers are a type of FM receiver that uses a positive feedback circuit to amplify the incoming FM signal. Regenerative receivers are more sensitive than TRF receivers, but they are also more prone to instability and interference.
* Crystal-set receivers are the simplest type of FM receiver that does not require any electrical power. Crystal-set receivers use a crystal diode to demodulate the incoming FM signal. Crystal-set receivers are not very sensitive or selective, but they are very simple to build and operate.