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:
Feb. 03, 2015
Filed:
Feb. 19, 2014
Seiko Instruments Inc., Chiba, JP;
Hideo Yoshino, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
Provided is a reference voltage generation circuit that has a flat temperature characteristic even when there are fluctuations in manufacturing step. After a semiconductor manufacturing process is finished, electrical characteristics of a semiconductor device are evaluated. Temperature characteristic of each reference voltage (VREF) of three unit reference voltage generation circuits () is evaluated. Then only a unit reference voltage generation circuit () having the most flat temperature characteristics is selected from among the three unit reference voltage generation circuits (). Only fuses () of the selected unit reference voltage generation circuit () are not cut, but other fuses () are cut. Accordingly only the selected unit reference voltage generation circuit () operates, and the other unit reference voltage generation circuits () do not operate.