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:
Mar. 17, 2015
Filed:
Aug. 31, 2011
Kazuo Kato, Chiba, JP;
Akira Takakura, Chiba, JP;
Toshitaka Fukushima, Chiba, JP;
Keisuke Tsubata, Chiba, JP;
Hisao Nakamura, Chiba, JP;
Tomohiro Ihashi, Chiba, JP;
Yoshinori Sugai, Chiba, JP;
Eriko Noguchi, Chiba, JP;
Satoshi Sakai, Chiba, JP;
Takanori Hasegawa, Chiba, JP;
Kazuo Kato, Chiba, JP;
Akira Takakura, Chiba, JP;
Toshitaka Fukushima, Chiba, JP;
Keisuke Tsubata, Chiba, JP;
Hisao Nakamura, Chiba, JP;
Tomohiro Ihashi, Chiba, JP;
Yoshinori Sugai, Chiba, JP;
Eriko Noguchi, Chiba, JP;
Satoshi Sakai, Chiba, JP;
Takanori Hasegawa, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A power supply unit has a first power supply circuit that supplies a voltage to a load driving unit and a second power supply circuit that supplies a voltage to circuits other than the load driving unit. A first switching unit connects any one of a power supply that supplies a power supply voltage and a voltage step-down circuit that supplies a step-down voltage of the power supply voltage to the first power supply circuit. A second switching unit connects any one of the power supply and the voltage step-down circuit to the second power supply circuit. A control unit controls the connection by the first switching unit and the connection by the second switching unit to switch the voltage supplied to the first power supply circuit and the voltage supplied to the second power supply circuit in accordance with properties of the load driving unit.