Circuit Schematic PLL FM Demodulator using XR2212

Radio. - This is electronic circuit of PLL FM Demodulator using XR2212 like in Figure 1 below. In this circuit schematic the basic component used are XR2212 and complement component other. 

In here we will give you global description about PLL FM Demodulator using XR2212 and then we will give you link to continue your reading from original source as external website.

Circuit Schematic

Figure 1. Circuit Schematic of PLL FM Demodulator using XR2212 (Source: Circuitstoday)

Component Part

• Phase Detector
• VCO
• XR2212
• Capacitor
• Variable resistor

Description

Circuit schematic like in Figure 1 above is Circuit Schematic PLL FM Demodulator using XR2212. Circuitstoday site describe that a  simple PLL FM demodulator circuit using IC XR2212 is shown here. XR2212 is a highly stable, monolithic PLL (phase locked loop) IC specifically designed for communication and control system applications. The IC has 0.01 Hz to 300KHz frequency range, 4.5 to 20V operating voltage range, 2mV to 3Vrms dynamic range, high temperature range, TTL / CMOS compatibility and adjustable tracking range. 

The working of a PLL FM demodulator is very easy to understand.The input FM signal and the output of the VCO is applied to the phase detector circuit. The output of the phase detector is filtered using a low pass filter, the amplifier and then used for controlling the VCO. When there is no carrier modulation and the input FM signal is in the center of the pass band (i.e. carrier wave only) the VCO’s tune line voltage will be at the center position. When deviation in carrier frequency occurs ( that means modulation occurs) the VCO frequency follows the input signal in order to keep the loop in lock. As a result the tune line voltage to the VCO varies and this variation is proportional to the modulation done to the FM carrier wave. This voltage variation is filtered and amplified in order to get the demodulated signal.

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