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. 02, 2012
Filed:
Mar. 03, 2010
Kazuhiko Miki, Kanagawa-ken, JP;
Toru Takahashi, Tokyo, JP;
Kazuhiko Miki, Kanagawa-ken, JP;
Toru Takahashi, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A reference current generating circuit includes an operational amplifier having one input terminal to receive a reference voltage and a field effect transistor having a gate to receive an output voltage of the operational amplifier. k resistors (k is an integer not less than 2) are connected in series to a drain of the field effect transistor, and a voltage at one of connection points of the resistors is feed backed to the other input terminal of the operational amplifier. A switch selects one of the connection points of the resistors and applies the voltage of the selected connection point as a reference voltage to a gate of a reference transistor to generate a reference current.