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:
Jun. 26, 2007
Filed:
Aug. 29, 2005
Hirokazu Kawagoshi, Ohtsu, JP;
Hirokazu Kawagoshi, Ohtsu, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
To prevent blowing of a fuse resistor due to application of static electricity to a trimming pad. In a fuse trimming circuit capable of switching the input level of a CMOS input circuit by supplying a voltage or a current to a trimming pad so as to blow a fuse resistor, a P-channel MOS transistor is inserted and connected between the trimming pad and the fuse resistor, and the MOS transistor is controlled to be turned on at a time of trimming. Thus, at the time of the trimming, electrical connection can be established between the trimming pad and the fuse resistor. At all times except the time of the trimming, electrical disconnection can be performed between the trimming pad and the fuse resistor if a control signal is not supplied to the control pad. Further, the parasitic diode of the MOS transistor functions as a static protection diode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile