Here's a simplified explanation of how an FM radio receiver works:
1. Antenna: The FM radio receiver has an antenna that captures the radio waves transmitted from FM radio stations. The antenna can be a telescopic antenna, a whip antenna, or a built-in antenna.
2. Tuner: The tuner section of the receiver selects the desired radio station by filtering out unwanted frequencies. When you tune to a specific radio station, the tuner locks onto the frequency of that station.
3. Demodulator: The demodulator separates the audio information from the radio waves. In FM radio, the audio signal is carried by the frequency variations of the radio waves. The demodulator extracts these frequency variations and recovers the audio signal.
4. Audio Amplifier: The recovered audio signal is usually weak, so it needs to be amplified to make it audible. The audio amplifier section of the receiver boosts the amplitude of the audio signal so that it can be heard through speakers or headphones.
5. Output: The amplified audio signal is then sent to the speakers or headphones, allowing you to listen to the radio station's programming.
FM radio receivers incorporate additional features such as automatic tuning, digital displays, volume control, and station presets to enhance user convenience and accessibility. Modern FM radio receivers may also include advanced technologies like RDS (Radio Data System) for displaying station information and song titles.