Title:
POWER INTRODUCING CIRCUIT
Document Type and Number:
Japanese Patent JPH05313766
Kind Code:
A
Abstract:
PURPOSE:To prevent the operation error of already prepared units due to the power noise at the time of unit insertion/extraction without using coils in power introducing parts of units and independently of capacitance components of units with respect to power introducing circuits mounted on units of an electronic device consisting of plural insertable/extractable units. CONSTITUTION:This power introducing circuit is provided with a voltage rise rate setting part 1 which outputs a set voltage Vs which rises up to an external supply voltage Vo at a prescribed speed at the time of connection to an external constant voltage power source, a comparator 2 which compares the set voltage Vs of the voltage rise rate setting part 1 and an internal supply voltage Vu of a unit internal power source with each other, and an internal power source control part 3 which is connected between the external constant voltage power source and the unit internal power source and controls the current flowing to the unit internal power source based on an output Vc of the comparator 2 so that the internal power source voltage Vu is equal to the set voltage Vs, and this circuit is provided in the unit.
Inventors:
KAYAYAMA RIYUUJI
Application Number:
JP11785192A
Publication Date:
November 26, 1993
Filing Date:
May 12, 1992
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G05F1/56; (IPC1-7): G05F1/56; G05F1/56
Attorney, Agent or Firm:
Teiichi