567 FM demodulator

As shown in Figure it is 567 FM demodulation circuit. In the figue, the FM signalenters from the 3 foot, the demodulated signal goes out from 5 foot. FM signal center frequency which the circuit can demodulateis: fo = 1.1 / RC, C1 isfilter capacitor, and C2 is bandwidth adjustment capacitor. WhenC2 decreases, the demodulator demodulating bandwidth increase..

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