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. 25, 2014
Filed:
Feb. 14, 2012
Kazuyasu Takimoto, Fuchu, JP;
Hiroshi Mochikawa, Hachioji, JP;
Yosuke Nakazawa, Kunitachi, JP;
Hiromichi Tai, Saitama, JP;
Atsuhiko Kuzumaki, Kodaira, JP;
Kazuyasu Takimoto, Fuchu, JP;
Hiroshi Mochikawa, Hachioji, JP;
Yosuke Nakazawa, Kunitachi, JP;
Hiromichi Tai, Saitama, JP;
Atsuhiko Kuzumaki, Kodaira, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a semiconductor switch includes a main element including a switching element and an antiparallel diode, and a reverse voltage application circuit. The reverse voltage application circuit includes an auxiliary electric-power supply, a high-speed free wheeling diode, an auxiliary element, and a capacitor. The high-speed free wheeling diode comprises a plurality of diodes connected in series.