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:
Nov. 27, 2001
Filed:
May. 17, 1999
Ichiro Omura, Yokohama, JP;
Suzuo Saito, Tokorozawa, JP;
Hiromichi Ohashi, Yokohama, JP;
Tomokazu Domon, Yokosuka, JP;
Koichi Sugiyama, Yokohama, JP;
Simon Eicher, Zurich, CH;
Tsuneo Ogura, Kamakura, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
According to this invention, there is provided a drive apparatus for a power device having high- and low-voltage main electrodes and a control electrode, including a circuit for decreasing a voltage of the control electrode to a voltage of the control electrode which is not higher than a threshold voltage of the power device before a voltage between the high- and low-voltage main electrodes enters an overshoot region in a case where the power device is to be turned off. Therefore, electron injection can be stopped before the voltage between the main electrodes rises, the stability of the current density can be improved, and current concentration, oscillation, and the like can be prevented to improve reliability.