The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2004
Filed:
Sep. 16, 2002
Applicant:
Inventor:
Takao Myono, Menuma-Machi, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/06 ;
U.S. Cl.
CPC ...
H02M 3/06 ;
Abstract
A DC—DC converter capable of generating an output voltage in increments of less than power supply voltage Vdd is provided. A power supply voltage Vdd is provided to a three-stage switched capacitor type DC—DC converter. A first stage of the DC—DC converter comprises two capacitors C and C and switches and , that alternate a connection of the capacitors C and C . The capacitors C and C are connected in series when charging by turning the switch ON, while the capacitors C and C are connected in parallel when discharging by turning the switches and ON. Thus a boosted voltage of 3.5 Vdd is obtained from an output terminal