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:
Aug. 06, 2002
Filed:
Jan. 12, 2001
Mako Kobayashi, Hyogo, JP;
Fukashi Morishita, Hyogo, JP;
Mihoko Akiyama, Hyogo, JP;
Yasuhiko Taito, Hyogo, JP;
Akira Yamazaki, Hyogo, JP;
Nobuyuki Fujii, Hyogo, JP;
Other;
Abstract
A semiconductor integrated circuit device includes a reference voltage generating circuit that can be tuned without a circuit replacement when a process condition is varied. The reference voltage generating circuit is constituted such that two different circuit configurations having different temperature properties are switched by a first switch. In each of the circuit configurations, a switch control circuit in which tuning can be performed by switching a second switch generates a control signal based on a test mode and supplies the signal to the first switch for tuning. Thereafter, a fuse in the switch control circuit is blown off to generate a control signal, and reference voltage Vref is output.