PLL FM Demodulator Circuit Module


Posted on Feb 5, 2014

This is a circuit about PLL system that can be used to implement an FM demodulator. Since the VCO output tracks the FM signal, and the VCO input voltage is proportional to the VCO output frequency, then the VCO input will be equal to the demodulated signal. This circuit is based on phase comparator and VCO. This is the figure of the circuit. For t


PLL FM Demodulator Circuit Module
Click here to download the full size of the above Circuit.

his example, an FM signal consisting of a 10-kHz carrier frequency was modulated by a 400-Hz audio signal. The schematic diagram shows the connections of the CD4046B as an FM demodulator. The total FM signal amplitude is 500 mV, therefore, the signal must be ac coupled to the signal input (terminal 14). Phase comparator I is used for this application because a PLL system with a center frequency equal to the FM carrier frequency is needed. Phase comparator I lends itself to this application also because of its high signal-input-noise-rejection characteristics.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Nicad-batterv-protection-circuit
    Input-buffered-mixer
    Garduino-Automated Gardening System using Arduino
    Traffic Lights Beginner Arduino Project
    DC Motor Control System Block Diagram
    ATmega8535 Line Follower Robot
    digital sine wave synthesis
    simple touch switch circuit
    What is analog to digital converter ADC using LM324 IC
    Three Flashing LED Doorbells For The Hearing Impaired
    USB Switch For Printers
    AUDIBLE LIGHT SENSOR
    NE5532 manufactured by headphone amplifier circuit



    Top