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:
Jan. 03, 2012
Filed:
Feb. 04, 2008
Hiroshi Mochikawa, Hachioji, JP;
Tateo Koyama, Hanno, JP;
Atsuhiko Kuzumaki, Kodaira, JP;
Junichi Tsuda, Fuchu, JP;
Hiroshi Mochikawa, Hachioji, JP;
Tateo Koyama, Hanno, JP;
Atsuhiko Kuzumaki, Kodaira, JP;
Junichi Tsuda, Fuchu, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor switch is provided with a main element having reverse conductivity and serving as a voltage-driven switching element having a high withstand voltage, an auxiliary element serving as a voltage-driven switching element having a withstand voltage lower than that of the main element, and a high-speed freewheel diode having a withstand voltage equal to that of the main element, wherein a negative pole of the main element is connected to a negative pole of the auxiliary element to define the positive pole of the main element as a positive pole terminal and the positive pole of the auxiliary element as a negative pole terminal, and the high-speed freewheel diode is parallel-connected between the positive pole terminal and the negative pole terminal so that a direction from the negative pole terminal toward the positive pole terminal constitutes a forward direction.