Digital frequency shift demodulator(CA3020、MC723、MC724)

Published:2011/7/18 20:22:00 Author:zj | Keyword: Digital, frequency shift, demodulator | From:SeekIC

As shown in the figure it is the digital frequency demodulation circuit. The circuit can be used in 1kHz to 10kHz frequency range, and can be demodulated to the 1% frequency offset. The input stage of the circuit is composed of wide band amplifier CA3020. The differential output is added to the J-K input end of J-K trigger. Gate circuit MC724 constitutes the monostable multivibrator. Monostable multivibrator timing cycle is equal to the center frequency of the half cycle. Input signal strobes trigger after being delayed by the monostable multivibrator.



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