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. 01, 2009
Filed:
Jan. 17, 2007
Mineo Noguchi, Tokyo, JP;
Mineo Noguchi, Tokyo, JP;
Oki Semiconductor Co., Ltd., , JP;
Abstract
A bandgap reference circuit inputs a reference potential trimming signal therein, generates a reference potential using PN-junction diode characteristics and generates a first temperature-dependent potential dependent on the temperature. A subtraction amplifier circuit inputs the reference potential, the first temperature-dependent potential and a subtracter trimming signal therein and generates a second temperature-dependent potential amplified by subtraction amplification of both a constant bias potential obtained by performing multiplication on the reference potential and the first temperature-dependent potential. An A/D converter inputs the reference potential and the second temperature-dependent potential therein and A/D-converts the second temperature-dependent potential by reference to the reference potential to thereby output temperature decision results.