Regulated electric power source circuit

Abstract

Abstract PURPOSE: To realize stable actuation by reducing base current supplied from the output side of a driving circuit to a switching transistor only in actuation. CONSTITUTION: When voltage (a) developed across capacitor C9b and supplied to control signal generation circuit 1 for actuation increases gradually up to fixed voltage V 0 , (time point t 1 ) circuit 1 starts operation, but since voltage (b) developed across C11b and supplied as an electric power source for starting driving circuit 2 is a relatively low voltage, base current supplied from the output side of circuit 2 to the base of switching trasistor 3 is less then that in normal operation. Because of the constitution like this, a drop in voltage (a) is small in its actuation and a signal obtained by rectifying an AC signal obtained at tertiary winding 4c immediately after the voltage drop is supplied to C9b and C11b, so that voltages (a) and (b) will rise as shown in the figure up to the required value. Consequently, circuits 1 and 2 are put into stable operation and the actuation is stabilized. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Akio Koizumi
• 👤 Hiroshi Nakazawa

Bibliographic Details