FM Receiver Block Diagram, Working Principle Understand Easily

Hey, we are going to know about FM Receiver Block Diagram and Working Principle. FM means Frequency Modulation. The main function of an FM receiver circuit is to receive the radio signal and converts it into the audio signal. FM receiver circuits are mainly used in broadcast receiver stations. A good FM receiver circuit should be able to receive signals properly, high bandwidth, very low noise, very low interferences, etc. Here, you will find the block diagram of FM Receiver which will help you to understand the working principle of FM Receiver.

FM Receiver Block Diagram

Here you can see a simple block diagram of FM Receiver.

FM Receiver Working Principle

To easily understand the working principle of FM Receiver, see the block diagram. The first block is the Antenna.

The antenna is used to receive the radio signals and intercepted it. The next block is Radio Frequency Amplifier or RF amplifier. The RF amplifier is used to amplify the RF signal received by the antenna. The received RF signal is very weak that is why it needs to amplify. The RF amplifier is also responsible for Noise-reducing, impedance matching, etc.

The next stage is the Mixer stage. The mixer circuit takes two signals as input, one is the amplified RF signal coming from the RF amplifier and another is an oscillating signal coming from the local oscillator. By combining those two signals, the mixer circuit generates the IF signal.

The IF amplifier circuit takes the IF signal or Intermediate Frequency signal coming from the Mixer Circuit and amplifies it.

The FM Demodulator Circuit is used to demodulate the FM signal. The FM demodulator circuit recovers the actual modulated signal which comes from the transmitter circuit in the form of the radio signal. The demodulator circuit gives de-emphasizing signal as output.

After passing the de-emphasizing signal (which coming from the demodulator circuit) through the AF or Audio Frequency Voltage Amplifier we get the original audio signal which was sent from the sender station.

At last the audio signal is fed to the power amplifier circuit to amplify it. Then the output of the power amplifier is applied to the speaker.

Remember that a FM Receiver Circuit only can receive the signal, it cannot transmit a signal. While receiving signal, frequency matching or frequency selection is a very important factor. There are so many signal of different frequencies are available. But using the frequency selection process, a particular signal is extracted or received.



Read Also:

• [Main] Differences Between AM and FM in Communication
• [BEST] Applications, Advantages of FM or Frequency Modulation
• [BEST] Advantages, Applications of FDM or Frequency Division Multiplexing

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