Improvements introduced in line desviacionde circuit with raster distortion correcion

摘要

A horizontal deflection circuit (20) with raster distortion correction includes a horizontal deflection winding (LH) coupled to a first retrace capacitor (C1, C2, C3), and an input inductance such as the primary winding (W1) of a flyback transformer (T1) coupled to a second retrace capacitor (CRT). Horizontal switching elements (Q1, D1) are operated at a horizontal deflection rate for generating current in the inductance (W1) and a horizontal scanning current in the deflection winding (LH). During retrace, the horizontal deflection winding (LH) and the first retrace capacitor (C1, C2, C3) form a first resonant circuit (33) and the input inductance (w1) and the second retrace capacitor (CRT) form a second resonant circuit 32). One of the switching elements (D1) decouples the resonant circuits (33, 32) from each other to minimize the interaction therebetween. A source (Q2) of raster distortion correction current is coupled to the deflection winding (LH) to provide the required scanning current modulation.