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. 24, 2017
Filed:
Jul. 26, 2016
Denso Corporation, Kariya, Aichi-pref., JP;
Ippei Kawamoto, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A switching element driving circuit includes a charge pump circuit and a drive voltage generating circuit. The charge pump circuit generates a boosted voltage. The drive voltage generating circuit generates a drive voltage for driving a switching element from the boosted voltage. The drive voltage generating circuit applies a current to a control terminal of the switching element through a resistor at least in an initial stage and an end stage of an output period during which a signal instructing the switching element to be turned on is outputted, and alleviates a rising and a falling of the drive voltage. A switching frequency of the charge pump circuit is set from 2 MHz to 30 MHz. As a result, generation of radio noise can be restricted in both of the drive voltage generating circuit and the charge pump circuit.