CIRCUIT FOR GENERATING DOUBLE VOLTAGE

摘要

PURPOSE: A circuit for generating a double voltage is provided which generates a voltage twice a power voltage using a condenser and transistors without using a separate boosting switching transformer. CONSTITUTION: A circuit for generating a double voltage includes a condenser(C21) serially connected to the output port of a power circuit, a pulse signal generator for generating the first and second pulse signal having phases opposite to each other, and the first transistor(Q21) which is turned on and off according to the first pulse signal and charges the output voltage of the power circuit in the condenser when turned on. The circuit further has the second transistor(Q22) which is turned on and off according to the second pulse signal and allows the output voltage of the power circuit to be serially connected to the charged voltage of the condenser to make the condenser output the voltage twice the output voltage of the power circuit when turned on, and a rectifier(24) for rectifying and smoothing the double voltage.