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:
Dec. 08, 2015
Filed:
Dec. 11, 2012
Applicant:
Denso Corporation, Kariya, Aichi-pref., JP;
Inventor:
Kazushi Matsuo, Takahama, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/26 (2006.01); H03L 7/00 (2006.01); H03B 1/00 (2006.01); H03L 1/02 (2006.01); H03K 3/0231 (2006.01);
U.S. Cl.
CPC ...
H03L 7/00 (2013.01); H03B 1/00 (2013.01); H03K 3/0231 (2013.01); H03L 1/026 (2013.01);
Abstract
In a CR oscillation circuit, resistance elements forming a series circuit include a first resistance element having a large temperature coefficient of resistance and a second resistance element having a smaller temperature coefficient of resistance than the first resistance element. At least one of a capacitor and an oscillation resistance element is trimmable. A first switching circuit connected between the series circuit and a non-inverting input terminal of a comparator is turned on when an output signal of the comparator is at a high level, and a second switching circuit is turned on when the output signal is at a low level.