RASTER DISTORTION CORRECTION ARRANGEMENT

摘要

A vertical rate signal generator (101) is coupled to an integrator (102) for producing a vertical rate parabola signal (VPAR). The parabola signal is applied to a band-pass filter (104) for producing a vertical rate sinusoidal signal (VSIN) that is applied to a convergence winding (78). When a loss of the horizontal synchronizing signal occurs, the frequency of the sawtooth signal (VSAW) decreases. As a result, the DC, average level of the sinusoidal signal varies, during a transition interval (TR), following restoration of the horizontal synchronizing signal. The band-pass filter filters out low frequency components. The duration of the transient interval is thereby reduced in a manner to reduce picture bounce. The peak amplitude of the sawtooth signal is also clipped (by Q2) for reducing the variation of the average level of the sinusoidal signal.