The STV9303 is a pulse driven vertical booster intended for use in color TV. It includes a vertical ramp generator specially designed to fit with deflection processors like STV2102 or STV2110 which provide a 10.5 line lengh vertical pulse. The discharging of the sawtooth capacitor is triggerred by the trailing edge of the vertical sync and the charging by the leading edge. During the sync pulse duration, the sawtooth will remains at its bottom value. Another possibility is to use the internal monostable (by connecting an external capacitor on Pin 5) to define the point where the sawtooth will restart. This second possibility is very usefull to avoid interlacing problems when using a conventional deflection processor delivering a small duration vertical pulse. The STV9303 includes a very efficient power amplifier for direct driving of a TV picture tube in B & W or color television.