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. 18, 2007
Filed:
Nov. 10, 2005
Kazuyoshi Nishi, Kyoto, JP;
Junji Takiguchi, Osaka, JP;
Kazuyoshi Nishi, Kyoto, JP;
Junji Takiguchi, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A CR oscillation circuit comprises first and second logic elements, a capacitive element, and a resistive element. The first logic element is connected between a first node and a second node. The second logic element is connected between the second node and a third node. The capacitive element is connected between the first node and the second node. The resistive element is connected between the first node and the third node. The capacitive element includes a well, a diffusion layer, a gate electrode and a gate oxide film. The capacitive element has a voltage-dependence characteristic such that its capacitance value varies according to the variation in a supply voltage. The capacitance value of the capacitive element decreases when the on-resistance of the first and second logic elements increases according to the variation in the supply voltage.