Frequency Shift Modulator Composed of CA3020,MC723

Published:2011/8/18 7:58:00 Author: | Keyword: Frequency Shift, Modulator | From:SeekIC

The circuit's main component uses digital integrated circuit which can be used in frequency range of 1-10kHz. Its identification precision is high so that it can detect small frequency shift as small as 1%. The picture shows the frequency shift modulator circuit. IC1 is wide frequency amplifier CA3020. It constitutes the circuit's input terminal whose differential output are put on IC2(JK trigger MC723)'s J,K input terminals. GATE circuit IC3 constitutes monostable multivibrator, and its timing cycle is equal to half period of central frequency. Its input signal will gate the trigger after it is time delayed by the monostable multivibrator.



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