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. 08, 2013
Filed:
Jan. 18, 2012
Kisei Hirobe, Miyagi-ken, JP;
Junichi Saito, Miyagi-ken, JP;
Kisei Hirobe, Miyagi-ken, JP;
Junichi Saito, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A constant-voltage circuit includes a first reference voltage generation unit which generates a reference voltage using a bandgap voltage of a bipolar transistor, a second reference voltage generation unit which generates a reference voltage using a field effect transistor, a constant voltage generation unit which generates a constant voltage with reference to either an output voltage of the first reference voltage generation unit or an output voltage of the second reference voltage generation unit, and a control unit which controls the first reference voltage generation unit, the second reference voltage generation unit, and the constant voltage generation unit. During an initial activation period, the first reference voltage generation unit and the second reference voltage generation unit are operated, and during a subsequent operation period, the first reference voltage generation unit is stopped.