Vertical convergence circuit

摘要

A vertical convergence circuit comprising means for producing a correcting signal having a parabolic waveform in synchronism with vertical scanning, means for separating this correcting signal into two waveforms corresponding solely to the former half and latter half respectively of the vertical scanning period, means for amplifying these two separated correcting signals independently of each other and regulating the amplitude thereof independently of each other, means for inverting the polarity of the two correcting signals independently of each other, and means for applying to the same convergence coil the two correcting signals whose amplitude is regulated and whose polarity is selected by the amplitude regulating means and polarity inverting means.