(D A line deflection voltage regulator (60) develops a regulated scan supply voltage. A line deflection circuit (80) is coupled to the voltage regulator (60) for generating line scanning current in a line deflection winding (L H ). The amplitude of the scanning current is dependent on the magnitude of the regulated scan supply voltage. A high voltage regulator (50) develops a second regulated voltage. A high voltage generator (70) is coupled to the high voltage regulator (50) for generating an ultor output voltage at an ultor terminal (U). The magnitude of the ultor output voltage is dependent on the second regulated voltage. A high voltage control circuit (U2) is coupled in a feedback path between the high voltage generator (70) and the high voltage regulator (50) for developing a first ultor control voltage that is representative of the ultor output voltage to regulate the ultor output voltage. A second ultor control voltage that is representative of fluctuations in the ultor output voltage is developed at a point (V e1 ) within the feedback path. The second control voltage is coupled to the line deflection voltage regulator (60) for varying the regulated scan supply voltage to provide raster width regulation.