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. 08, 2017
Filed:
Oct. 07, 2015
Rohm Co., Ltd., Kyoto, JP;
Yuji Ishimatsu, Kyoto, JP;
Motohiro Ando, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A power semiconductor drive circuit includes a parallel circuit connected to a gate of a power semiconductor element and constituted by two transistors for setting gate resistance of the power semiconductor element; a gate voltage monitoring circuit connected to the gate of the power semiconductor element and the parallel circuit, wherein a monitoring voltage is set in the gate voltage monitoring circuit to monitor a gate voltage of the power semiconductor element; a signal delay circuit to delay an output signal of the gate voltage monitoring circuit; and a gate control circuit to change the magnitude of combined resistance of the parallel circuit based on an output signal output from the signal delay circuit.