Vertical deflection S-correction with picture height compensation

摘要

A differential amplifier formed by a pair of transistor couples a vertical sawtooth signal to an input side of a vertical deflection amplifier. Nonlinearity of the transistor pair provides linearity or S-correction in the vertical direction. The amplitude of the sawtooth signal is adjusted by way of adjusting a vertical height control signal. To compensate for a change in the S-correction that is introduced by the amplitude adjustment, the vertical height control signal is coupled to the emitters of the transistor pairs for controlling the nonlinearity.