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:
Apr. 24, 2018
Filed:
Dec. 13, 2016
Fuji Electric Co., Ltd., Kawasaki-shi, Kanagawa, JP;
Satoki Takizawa, Hino, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, Kanagawa, JP;
Abstract
A gate drive circuit includes first and second transistors for turning on and off semiconductor switching devices. The circuit includes a DC power supply for driving the first and second transistors. The gate drive circuit further includes a third transistor, a fourth transistor, and a DC power supply being a power supply for the third and fourth transistors with a voltage value lower than the voltage value of the DC power supply, thereby making lower the impedance of the path of a current flowing from the DC power supply to the gates of the switching devices through the third transistor than the impedance of the path of a current flowing from the DC power supply to the gates of the switching devices through the first transistor.