Power supply circuit

Abstract

Abstract PURPOSE: To prevent the chopper transistor from malfunctioning and reduce the leakage of noise by shifting the timings of two switching operations to avoid the mutual interference therebetween. CONSTITUTION: As a control circuit for preventing the mutual interference, an oscillator 1 and flip-flops 2, 3 are attached to a switching regulator which consists of a pre-regulator and a separately excited inverter. Chopper circuits Tr 1 , Tr 2 and a switch of an inverter 6 are controlled through the oscillator 1, namely actuated by rising of an output from the oscillator and falling thereof, respectively. In addition, duty ratio of the oscillating output is set other than 1 to obtain the unsymmetrical pulse wave form. By so doing, it is positively prevented that two switching operations are performed at the same timings. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Fumio Asano

Bibliographic Details