Title:
POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2002/027905
Kind Code:
A1
Abstract:
A power supply in which power conversion efficiency is enhanced in all operation modes by supplying power to a load (60) from any one or both of first power supply circuit (20) and second power supply circuit (40), detecting the operation mode of the load (60) through an operation mode detecting means (65), and controlling switches (11, 12) depending on the operation mode of the load (60) to select a power supply circuit for supplying power to the load (60).
Inventors:
FUJII MASASHI (JP)
Application Number:
PCT/JP2001/008528
Publication Date:
April 04, 2002
Filing Date:
September 28, 2001
Export Citation:
Assignee:
CITIZEN WATCH CO LTD (JP)
FUJII MASASHI (JP)
FUJII MASASHI (JP)
International Classes:
H02J1/00; G06F1/26; G06F1/32; H02J7/00; H02J7/34; H02J9/00; H02J9/06; H02M3/155; H02M3/156; H02M3/157; H02M3/158; (IPC1-7): H02M3/156; G05F1/56; G06F1/32; H02J7/00
Foreign References:
| EP0903839A1 | 1999-03-24 | |||
| GB2310570A | 1997-08-27 | |||
| JPH05260727A | 1993-10-08 | |||
| US4502152A | 1985-02-26 | |||
| GB2243961A | 1991-11-13 | |||
| JPH11178223A | 1999-07-02 |
Attorney, Agent or Firm:
Osawa, Takashi (Ikebukuro White House Bldg. 20-2
Higashi-Ikebukuro 1-chome Toshima-ku, Tokyo, JP)
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