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:
Apr. 01, 2014
Filed:
Sep. 08, 2011
Kazunori Watanabe, Kariya, JP;
Tsuneo Maebara, Nagoya, JP;
Yasunari Tanimura, Takahama, JP;
Noriyuki Takagi, Anjo, JP;
Yoshiyuki Hamanaka, Kariya, JP;
Junichi Fukita, Anjo, JP;
Kazunori Watanabe, Kariya, JP;
Tsuneo Maebara, Nagoya, JP;
Yasunari Tanimura, Takahama, JP;
Noriyuki Takagi, Anjo, JP;
Yoshiyuki Hamanaka, Kariya, JP;
Junichi Fukita, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
An electronic system has IGBT, on driving FET and off driving FET connected with the gate of the IGBT, and a control circuit. The on driving FET in an on state supplies electric charge to the IGBT gate. The off driving FET in an on state releases the charge from the GET gate. The control circuit controls each of the on FETs according to a driving signal to be set in the on and off states every switching period of time and to control the voltage at the IGBT gate. When on-failure occurs in the on driving FET set in the on state so as to keep the on driving FET in the on state in spite of control of the control circuit, the control circuit controls a controlled element other than the off driving FET to set the IGBT in the off state.