Patents by Inventor Gakuou Sasaki

Gakuou Sasaki 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).

  • Switching power supply device
    Patent number: 9136768
    Abstract: A switching power supply device includes: a power factor correction circuit having a step-up chopper circuit including a chopper switching element and a power factor correction control unit controlling a switching operation of the chopper switching element; a DC/DC converter having a transformer, a switching circuit, a rectifier circuit, a smoothing circuit, and a DC/DC converter control unit; and a control ON/OFF circuit controlling the ON/OFF states of an output voltage of the DC/DC converter circuit. The switching circuit is provided at a primary winding side of the transformer. The rectifier circuit and the smoothing circuit are provided at a secondary winding side of the transformer. The control ON/OFF circuit controls the ON/OF states of the output voltage of the DC/DC converter circuit by controlling the power factor correction control unit and the DC-DC converter control unit based on an external signal.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: September 15, 2015
    Assignee: TDK Corporation
    Inventors: Gakuou Sasaki, Yuuta Takano