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:
Aug. 04, 2009
Filed:
Jul. 02, 2007
Akihisa Matsushita, Tokyo, JP;
Akihisa Matsushita, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
There are provided: a voltage division circuit () that performs voltage division of the voltage applied between the main electrodes of a non-latching switching element () having two main electrodes and a single control electrode at voltage division elements () to (); a control current source () that injects current at the control electrode in accordance with the divided voltage of main voltage detection voltage division elements, of the voltage division elements () to () of the voltage division circuit () and a voltage division ratio control circuit () that adjusts the voltage division ratio of the main voltage detection voltage division elements (), () of the voltage division circuit () in accordance with a control signal for controlling the switching element ().