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. 27, 2013
Filed:
Aug. 08, 2011
Kiyohito Hara, Hyogo, JP;
Hirohisa Abe, Osaka, JP;
Kiyohito Hara, Hyogo, JP;
Hirohisa Abe, Osaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A switching regulator converts an input voltage into an output voltage, wherein an operation of the switching regulator is stopped by an enable signal in a standby status. The switching regulator includes a switching transistor performing switching in accordance with a control signal; an inductor that is charged with the input voltage by the switching transistor; a rectifying transistor including a bipolar transistor discharging the inductor when the switching transistor is turned off; a control circuit unit controlling the switching transistor such that a voltage proportional to the output voltage becomes equal to a reference voltage; and a rectifying transistor control circuit unit turning off the rectifying transistor in a cut-off state upon reception of the enable signal indicating the standby status or connecting a base and a collector of the rectifying transistor upon reception of the enable signal indicating a normal operation so that a diode is formed.