Title:
POWER SOURCE CIRCUIT
Document Type and Number:
Japanese Patent JPS60134764
Kind Code:
A
Abstract:
PURPOSE:To reduce power consumption in an idle state by supplying a current supplied to a switching regulator from an input side at the rising time and supplying from an output side after the output reaches the prescribed value. CONSTITUTION:When power is supplied from a transmission line at a rising time, a transistor 235 as a switch element is OFF, a voltage divided by resistors 233, 234 is generated at the emitter of a transistor 236, and a current I1 is supplied from an input side to a switching regulator IC226 as a control circuit. When the output voltage EB of a switching regulator 22 arrives at the prescribed voltage for operating the IC226, the transistor 235 becomes ON, with the result that the transistor 236 becomes OFF. At this time, a current I1 is supplied from the output side through a diode 237 to the IC226.
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Inventors:
NAKAKAWARA KIYOUICHI
Application Number:
JP24184283A
Publication Date:
July 18, 1985
Filing Date:
December 23, 1983
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
H04M19/08; H02M3/10; H02M3/155; (IPC1-7): H04M19/08
Attorney, Agent or Firm:
Noriyuki Noriyuki