Radio Frequency Modulator Circuit Diagram

Published:2011/6/19 9:11:00 Author:Vicky | Keyword: Radio Frequency Modulator | From:SeekIC

The above picture is the detailed circuit of radio frequency modulator. IC1 is integrated circuit TA7673 especially for modulator, the pins 10 & 11 of which produce picture carrier signal by externally connection to crystal oscillator, and pins 4 & 5 of which produce 6.5MHz secondary audio signal. Audio signal is input via pin 6 of ICl, and video signal is input via pin 16 of ICl. When crystal oscillators of different work frequency are connected to part between pin 10 and pin 11 , the circuit can then give out picture carrier signal from channel 1 to 5 in pin 2 and pin 15. The circuit doesn’t need debugging after finishing assembly, but the whole circuit uses small metal-box as shield.



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