HIGH VOLTAGE GENERATING CIRCUIT

摘要

PURPOSE:To improve the high voltage regulation characteristic by providing a parallel circuit of rectifying diode and resistor in voltage multiplier/rectifier circuit having flyback thransformer. CONSTITUTION:A clamp circuit b comprising a parallel circuit of rectifier diode D4 and resistor R3 is provided at FBT output terminal fo anode voltage generating circuit having voltage multiplier/rectifier circfit a containing flyback transformer FBT, and its output terminal is connected to automatic brightness limiting circuit. Consequently when attenuating the amplitude of high voltage ringing for providing output waveform scanning line interval of FBT at the clamp circuit b, while selecting the raster ringing occuring at minimum load current to Braun tube to the minimum and attenuating the ringing amplitude under no load, anode voltage drop under no load and high voltge regulation characteristic can be improved.