Hitachi CMT2988 pincushion correction circuit

Published:2011/7/25 22:12:00 Author:Christina | Keyword: Hitachi, pincushion correction circuit | From:SeekIC

The 4V sawtooth wave voltage (peak-peak value) of the R617 adds to the pin-1 of IC651 through the C651 and R651, this voltage is amplified and disposed by the IC651, the pin-2 of IC651 outputs the 2V (peak-peak value) concave parabolic wave voltage, this voltage is integrated by the C653, C652 and R666, the R657 adjusts the amplitude of the parabolic wave, then it adds to the pin-7 of IC651 through the C655, it is amplified and reshaped by the IC651, the pin-8 outputs the convex parabolic wave voltage, this voltage is followed by the Q652's emitter and it is amplified by the Q651 to form the 9V (peak-peak value) concave parabolic wave voltage on both ends of C727.



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