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:
Jul. 14, 1987
Filed:
Mar. 24, 1986
Yoshio Tanaka, Kanagawa, JP;
Toshihiro Onodera, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A main switch consisting of a switching transistor and a current transformer is triggered at the leading edge of a main switch drive pulse. The switching transistor then starts a positive feedback operation through the current transformer and is turned on at high speed. Upon activation of the switching transistor, the magnetic core of the current transformer is saturated by the switching transistor emitter current flowing in the current transformer. Magnetic saturation of the core turns off the switching transistor with the magnetic energy stored in the current transformer. The main switch drive pulse falls after the switching transistor is turned off.