| 摘要 |
PURPOSE:To eliminate a delay in the correction of a screen width at fluctuation of a load of a flyback by forming a power supply for a pin cushion distortion amplifier section in common for a power supply for a horizontal width control amplifier section. CONSTITUTION:A parabolic waveform for pin cushion distortion PCC correction is applied to a horizontal width control amplifier section 12 and a horizontal width control drive section 13 through a coupling capacitor 14 and a DC potential is in existence even in the side of a PCC amplifier section 16 and a voltage across the coupling capacitor 14 is standstill in terms of DC. When the horizontal width control amplifier section 12 is changed suddenly, the standstill state is lost and a time constant by a DC energy change is produced. However, the voltage change in the same direction is produced even to the power supply section 16 by using the same power supply used by the amplifier section 12 for the PCC power supply 15A. As a result, since the voltage across the coupling capacitor 14 is kept standstill in terms of DC, no delay is caused for the width correction of the screen. |
