Patents by Inventor Norikazu Kanatake

Norikazu Kanatake 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).

  • DC-DC converter
    Patent number: 8179106
    Abstract: A synchronous-rectifier type DC-DC converter includes a high-side main switch element, a low-side rectifying switch element, and a control drive circuit. The rectifying switch element includes a rectifying transistor element and a rectifying diode element connected in antiparallel with the rectifying transistor element. The control drive circuit detects an input voltage to the main switch element and determines the input voltage or a rate of increase in the input voltage. When the determined value exceeds a predetermined reference value, a complementary ON/OFF operation of the main switch element and the rectifying transistor element is released, and a state where both the main switch element and the rectifying transistor element are kept OFF for a time period that is longer than a dead-time during the complementary ON/OFF operation is set.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: May 15, 2012
    Assignee: Denso Corporation
    Inventors: Norihito Tokura, Hisato Kato, Norikazu Kanatake, Masakiyo Horie
  • DC-DC converter
    Publication number: 20100060254
    Abstract: A synchronous-rectifier type DC-DC converter includes a high-side main switch element, a low-side rectifying switch element, and a control drive circuit. The rectifying switch element includes a rectifying transistor element and a rectifying diode element connected in antiparallel with the rectifying transistor element. The control drive circuit detects an input voltage to the main switch element and determines the input voltage or a rate of increase in the input voltage. When the determined value exceeds a predetermined reference value, a complementary ON/OFF operation of the main switch element and the rectifying transistor element is released, and a state where both the main switch element and the rectifying transistor element are kept OFF for a time period that is longer than a dead-time during the complementary ON/OFF operation is set.
    Type: Application
    Filed: September 3, 2009
    Publication date: March 11, 2010
    Applicant: DENSO CORPORATION
    Inventors: Norihito Tokura, Hisato Kato, Norikazu Kanatake, Masakiyo Horie