Horizontal output circuit for television receiver

Abstract

In the horizontal output circuit, a horizontal output transistor is coupled at the base with a drive pulse signal having negative peaks recurring at the horizontal periods of a television signal from a horizontal drive circuit. The emitter-collector path of the transistor is connected in parallel with a series circuit, a damper diode, and a resonant capacitor. The series circuit includes a horizontal deflecting coil and an S-distortion correcting capacitor. The collector of the transistor is connected through a flyback transformer to a DC power source. A parallel circuit is connected between the emitter of the transistor and a reference potential point. The parallel circuit is made up of a capacitor and a diode. The diodes are connected in a back-to-back manner. A series circuit including a choke coil and a capacitor is connected across the capacitor. A modulating source is connected across the capacitor of the smoothing circuit. The modulating source is controlled by a signal derived from a vertical output stage of the television receiver. The capacitor of the parallel circuit is discharged under control of the modulating source, so that the discharge current from the capacitor parabolically varies at the vertical scanning periods. The pincushion distortion is corrected through the parabolic variation of the horizontal deflecting current.

Dependencies are inferred from the claim text.