Color TV pincushion correction circuit diagram 1

Published:2011/7/21 1:42:00 Author:Ecco | Keyword: Color TV , pincushion correction | From:SeekIC

Field excitation pulses is applied directly to the pin 13 of N402 (TA8859) to trigger monostable trigger, then it generates a constant field frequency pulse-width pulse, which can control field sawtooth wave generating circuit after shaping, the N402 (15) pin is connected externally C418 capacitor with constant current charging to form a sawtooth wave current. Sawtooth amplitude and charging speed is controlled by the AGC circuit of N402, which can meet the needs of 50Hz/60Hz. Sawtooth wave produced by the field sawtooth wave circuit is made a series of linear correction by the N402, then pin (8) will output field excitation pulse.



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