Patents by Inventor Junichi Fukita

Junichi Fukita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electronic system for converting DC voltage into AC voltage
    Patent number: 8687327
    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.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: April 1, 2014
    Assignee: Denso Corporation
    Inventors: Kazunori Watanabe, Tsuneo Maebara, Yasunari Tanimura, Noriyuki Takagi, Yoshiyuki Hamanaka, Junichi Fukita