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. 03, 2015
Filed:
Sep. 26, 2011
Seiichiro Kihara, Osaka, JP;
Seiichiro Kihara, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention provides a safe circuit that can prevent an arm short, when a half-bridge circuit is configured by using a normally-on switching element, and the half-bridge circuit is used as a driver circuit or an inverter circuit. In a driver circuit configured by a half-bridge circuit in which one of input and output terminals of a first switching elementis connected to a first power-supply voltage Von a high-voltage side, and the first switching elementand a second switching elementare connected in series, a normally-off third switching elementis inserted between the second switching elementand a second power-supply voltage Von a low voltage side. The third switching elementis turned off, when an operating voltage VH or VL supplied from control-circuit power suppliesandis insufficient for the operation of a control circuit