POWER SUPPLY CIRCUIT

摘要

Alternating current at one of a plurality of different voltages is converted to a predetermined direct current voltage by a rectifying circuit which includes a plurality of capacitors and a rectifier connected in series with a pair of AC input terminals to charge the capacitors in such a manner as to divide the voltage between the capacitors. One of the capacitors has a pair of output terminals connected across it and a transistor switch is connected in parallel with the rectifier and the remaining capacitor to cause the current charge from the remaining capacitor to be delivered to the capacitor connected between the output terminals. A detecting circuit detects the voltage value of the input AC voltage and produces a detected output response which causes a control circuit connected to the transistor switch to change the manner of the rectifying operation of the rectifying circuit.