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. 18, 2022
Filed:
Sep. 14, 2021
Mitsubishi Electric Corporation, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An object of the present disclosure is to provide a semiconductor device drive circuit stably preventing an erroneous operation in accordance with an application of dV/dt. A semiconductor device drive circuit includes: pulse transmission circuits outputting an on-pulse transmission signal and an off-pulse transmission signal based on a level shift on-pulse signal and a level shift off-pulse signal; a dV/dt detection circuit detecting a dV/dt period based on the level shift on-pulse signal and the level shift off-pulse signal; a logic filter circuit which does not change outputs when both the on-pulse transmission signal and the off-pulse transmission signal are input; and a latch circuit outputting a signal synchronized with an output of the logic filter circuit. The pulse transmission circuit includes impedance adjusting parts reducing a signal level of the on-pulse transmission signal and the off-pulse transmission signal during the dV/dt period.