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:

New Circuits

.

 


Popular Circuits

LF Exciter using I2PHD/IK2CZL JASON
Universal Power Controller
Guitar Schematics
op amp Find Vo in an op-amp transistor circuit
bluetooth controlled relay
waterpump safety guard for fish
The 145 Theremin
Discrete components stereo encoder circuit diagram
As current feedback circuit of four b



Top