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:
Oct. 27, 2009
Filed:
Sep. 19, 2008
Hirofumi Wada, Osaka, JP;
Atsuo Inoue, Kyoto, JP;
Noriaki Matsuno, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An inverse temperature characteristic generating circuit decreases an output voltage Vby a voltage V, and supplies the resultant voltage as a voltage VA to a temperature characteristic generating circuit. The temperature characteristic generating circuit includes a differential amplification circuit that receives a terminal voltage Vbetween resistances Rand Rand an emitter voltage Vof a bipolar transistor T, and outputs a control signal VC. When the terminal voltages Vand Vare equal to each other, an operation of a circuit is stable. The temperature characteristic of the voltage VA during the stable operation, and the temperature characteristic of the voltage Vare inverse to each other and therefore cancel each other, so that the constant voltage Vindependent of temperature is output. In addition, the output terminal is not connected via a resistance to a ground, so that low current consumption can be easily achieved.