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:
Sep. 21, 2004
Filed:
Aug. 21, 2003
Applicant:
Inventors:
Aki Urakami, Hyogo, JP;
Michio Nakajima, Hyogo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/00 ;
U.S. Cl.
CPC ...
H03K 3/00 ;
Abstract
In an output circuit of a semiconductor device, an output buffer circuit includes a P-channel MOS transistor and a resistor connected in series between a line of a power supply potential and an output node. Current driving capability of the output buffer circuit is adjusted by making the P-channel MOS transistor nonconductive when a fuse is not blown, and making P-channel MOS transistor conductive when the fuse is blown. Thus, desired circuit characteristics can be obtained. Further, measures against electrostatic discharge can be taken by providing the resistor between a drain of the P-channel MOS transistor and the output node.