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:
May. 04, 2004
Filed:
Feb. 27, 2002
Applicant:
Inventors:
Koichi Inatomi, Kasugai, JP;
Ryuta Nagai, Kasugai, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/613 ; G05F 1/618 ;
U.S. Cl.
CPC ...
G05F 1/613 ; G05F 1/618 ;
Abstract
A control circuit of a DC—DC converter including a switch circuit, which outputs a step-down control signal or a step-up control signal in response to a switching signal, and a switching signal generation circuit, which is connected to the switch circuit to generate the switching signal using a duty setting signal. The switching signal generation circuit decreases the number of external terminals in a semiconductor device having the control circuit.