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:
Dec. 17, 2019
Filed:
Dec. 21, 2018
Denso Corporation, Kariya, Aichi-pref., JP;
Akifumi Araragi, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
In a drive circuit, a control switch is electrically connected between a negative voltage source and a reference voltage generator. A drive controller switches a discharge switch and a control switch from an off state to an on state to thereby supply a first negative output voltage to a main control terminal of a target switch. The drive controller switches the discharge switch and the control switch from the on state to the off state to thereby change the first negative output voltage to be supplied to the main control terminal of the target switch to a second negative voltage based on the reference voltage generated by the reference voltage generator. The second negative voltage is more positive than the first negative voltage.