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. 20, 2013
Filed:
Feb. 13, 2012
Tomonori Kimura, Obu, JP;
Tomonori Kimura, Obu, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A drive circuit for a semiconductor switching element is disclosed. The drive circuit includes a power supply, a capacitor, a connection changeover unit for switching a connection form between the power supply and the capacitor, a resistor connected to a control terminal of the semiconductor switching element, first and second switching elements whose common connection point is connected to the resistor, a positive-side diode whose cathode is connected to the first switching element, a negative-side diode whose anode is connected to the second switching element, and a current conduction control circuit for controlling the connection changeover unit, and the first and second switching elements to form (i) a first path for charging the capacitor, (ii) a second path for charging the control terminal of the semiconductor switching element, and (iii) a third path for discharging the control terminal of the semiconductor switching element.