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:
May. 19, 2009
Filed:
Jan. 24, 2006
Tsutomu Kojima, Yokohama, JP;
Tsutomu Kojima, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
There is provided with a gate drive circuit including: a first switching element connected at one end to a power terminal; a second switching element connected at one end to the other end of the first switching element and connected at the other end to a reference terminal; a gate voltage output terminal which supplies a voltage at a node between the first switching element and the second switching element to a drive switching element as an output gate voltage; a gate voltage monitoring circuit which monitors the output gate voltage; an overcurrent detection circuit which monitors a current through the drive switching element; and a control circuit which generates a control voltage for controlling impedance of the second switching element based on an on/off signal for indicating that the drive switching element should be turned on/off, a gate voltage monitoring signal and an overcurrent monitoring signal.