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. 18, 1984
Filed:
Feb. 12, 1982
Masahiko Akamatsu, Amagasaki, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A power semiconductor switching device comprises a first transistor which has semiconductor layers whose conductive types are alternately different in a first pattern and has an emitter connected to one end of a main circuit including a load; a second transistor which has a collector connected to the base of the first transistor, a base connected to the collector of the first transistor, an emitter connected to the other end of the main circuit, and semiconductor layers whose conductive types are alternately different in a second pattern; and a control transistor which has a paired main electrodes connected in parallel between the base and the emitter of at least one transistor in the first and second transistors to control load current passing between the emitter of the first transistor and the emitter of the second transistor by control of the base.