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:
Jul. 11, 2006
Filed:
Feb. 13, 2004
Applicants:
Shuji Mayama, Mie, JP;
Isao Isshiki, Mie, JP;
Inventors:
Shuji Mayama, Mie, JP;
Isao Isshiki, Mie, JP;
Assignees:
Autonetworks Technologies, Ltd., Mie, JP;
Sumitomo Wiring Systems, Ltd., Mie, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 3/20 (2006.01); H03K 17/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
According to the charge pump circuit, a constant current charging and discharging circuit using follower circuits is interposed at current paths in charging and discharging a capacitor for stepping up. Transistors of the follower circuits are alternately made ON in accordance with a clock signal inputted from a signal input portion for switching to connect the capacitor for stepping up and restricting a current in cooperation with resistors or the like.