Deflection circuit for a television receiver using symmetrical deflection

摘要

A deflection method and circuit for symmetrical horizontal scanning in a television tube utilizes a vertical deflection coil and an auxiliary vertical deflection coil. The vertical deflection coil is energized with a sawtooth vertical scanning current having a first slope during vertical trace to generate a first vertical deflection field. The auxiliary vertical deflection coil is energized with a sawtooth vertical auxiliary current having a line frequency and a second slope during horizontal trace equal but opposite to the first slope of the vertical scanning current to generate a second vertical deflection field. The first and second vertical deflection fields are superimposed in the tube to produce a stepped vertical deflection field.