Patents by Inventor Shoji NITAWAKI

Shoji NITAWAKI 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).

  • LCD driving circuit with ESD protection
    Patent number: 8749291
    Abstract: A semiconductor integrated circuit has an output terminal connected to an external load, an internal signal line by which the output terminal is connected to an internal node, and a voltage generator that outputs a voltage to the internal node, for output through the internal signal line and the output terminal to the external load. A voltage attenuating element is connected to the internal signal line to attenuate voltage swings on the internal signal line. A limiting circuit is connected to the internal node to limit the voltage at the internal node to a predetermined range. Moderate voltage swings caused by external electromagnetic interference are kept within the predetermined range by the voltage attenuating element, so that the limiting circuit does not operate and the average output voltage is not changed.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: June 10, 2014
    Assignee: Oki Semiconductor Co., Ltd.
    Inventors: Masakuni Kawagoe, Shoji Nitawaki, Chikashi Fuchigami
  • SEMICONDUCTOR INTEGRATED CIRCUIT
    Publication number: 20100245342
    Abstract: A semiconductor integrated circuit has an output terminal connected to an external load, an internal signal line by which the output terminal is connected to an internal node, and a voltage generator that outputs a voltage to the internal node, for output through the internal signal line and the output terminal to the external load. A voltage attenuating element is connected to the internal signal line to attenuate voltage swings on the internal signal line. A limiting circuit is connected to the internal node to limit the voltage at the internal node to a predetermined range. Moderate voltage swings caused by external electromagnetic interference are kept within the predetermined range by the voltage attenuating element, so that the limiting circuit does not operate and the average output voltage is not changed.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 30, 2010
    Applicant: OKI SEMICONDUCTOR CO., LTD.
    Inventors: Masakuni KAWAGOE, Shoji NITAWAKI, Chikashi FUCHIGAMI