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:
Sep. 12, 1995
Filed:
Feb. 23, 1994
Applicant:
Inventor:
Hiromichi Tai, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02H / ; H02M / ;
U.S. Cl.
CPC ...
363 57 ; 363 96 ; 327440 ;
Abstract
A gate power supply circuit including a switching device and a gate drive circuit connected to the switching device for generating a gate signal to be supplied to a gate of the switching device. The gate power supply circuit further includes a first series circuit of a first capacitor and an inductor, connected in parallel with the switching device, and a second series circuit of a first diode and a second capacitor, connected in parallel with the inductor. The gate drive circuit is connected to the second capacitor to receive energy stored in the second capacitor as power source for the gate drive circuit.