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. 12, 2008
Filed:
Aug. 18, 2006
Satoshi Yokoo, Ota, JP;
Satoshi Yokoo, Ota, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
In CMOS processing, there may be a case in which a resistance element, such as a poly-silicon resistance, or the like, may be formed which has negative temperature characteristics. In a constant current circuit using this resistance element, a constant current output less affected by the influence of varying temperature is obtained. To a load-side path of a current mirror circuit, a serial connection circuit and a temperature compensation circuit are arranged in parallel each other. The serial connection circuit includes a transistor Q, a resistance element Rand a bipolar transistor Qand flows a current Ihaving positive temperature characteristics. The temperature compensation circuit includes a transistor Qand a resistance element Rand flows a current Ihaving negative temperature characteristics. A constant current output based on the sum current I of the currents Iand Iis obtained.