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:
Apr. 06, 1999
Filed:
Jul. 16, 1997
Applicant:
Inventor:
Michiaki Yama, Kyoto, JP;
Assignee:
Rohm Co. Ltd., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323282 ; 323222 ;
Abstract
A power supply apparatus for stepping up an input voltage and for outputting a constant voltage includes an inductance element and a first transistor connected in series between an input terminal and an output terminal, a second transistor connected between a node between the inductance element and the first transistor and a reference potential, and a voltage holding element connected between the output terminal and the line of the reference potential. The first and second transistors are alternately rendered conductive in accordance with an output voltage from the output terminal while the voltage holding element is charged, so that the voltage of the power supply is stepped up.