Patent ID: 6154382
Filing Date: 2000-11-28
Classification: H02M

Abstract:
A high-voltage power supply circuit that effects rectification and successive multiplication of an ac input, and outputs a high dc voltage, comprising:a transformer including a primary winding to which an ac voltage is applied, and one secondary winding formed of a number of turns according to a desired step-up voltage;a plurality of diode bridges connected in series via a first plurality of capacitors with said secondary winding for effecting full-wave rectification of ac voltage outputted from said secondary winding;a second plurality of capacitors respectively provided for said diode bridges for accumulating charges by output voltage that has undergone said full-wave rectification; andmeans for connecting a load between ground potential and an output terminal of a last-stage diode bridge farthest from said secondary winding,wherein, of said plurality of diode bridges, an output terminal of a first-stage diode bridge closest to said secondary winding is connected to said ground potential, anda midpoint of said secondary winding is not connected to said ground potential.