Title:
INRUSH CURRENT REDUCTION CIRCUIT AND POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2007/020692
Kind Code:
A1
Abstract:
[PROBLEMS] To reduce inrush current to a capacitor in a load circuit or a power
supply, and to reduce the cost without shortening the lifetime of the capacitor.
[MEANS FOR SOLVING PROBLEMS] A circuit for reducing the inrush current to a capacitor
which is connected with a power supply input terminal of a load circuit comprises
a load current detection circuit (12) for detecting a current id flowing into
a load circuit (13), a switching element Q1 which is turned on when the current
id detected by the load current detection circuit (12) exceeds a threshold or
the variation of the current exceeds a threshold, and a second capacitor C2 which
is connected in parallel with the capacitor C1 when the switching element Q1 is
turned on.
Inventors:
TAKAMATSU MASASHI (JP)
Application Number:
PCT/JP2005/015048
Publication Date:
February 22, 2007
Filing Date:
August 18, 2005
Export Citation:
Assignee:
FUJITSU LTD (JP)
FUJITSU PERIPHERALS LTD (JP)
TAKAMATSU MASASHI (JP)
FUJITSU PERIPHERALS LTD (JP)
TAKAMATSU MASASHI (JP)
International Classes:
G05F1/10
Foreign References:
| JP2000175438A | 2000-06-23 | |||
| JPH1195845A | 1999-04-09 | |||
| JP3188873B2 | 2001-07-16 |
Attorney, Agent or Firm:
KUBO, Yukio (1-26 Nishinakajima 7-chome,, Yodogawa-ku, Osaka-sh, Osaka11, JP)
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