Patents by Inventor Koji Yoichi

Koji Yoichi 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).

  • Switched capacitor circuit type digital/analog converter capable of suppressing change of setting error
    Patent number: 7227486
    Abstract: In a digital/analog converter of a switched capacitor circuit type including at least one capacitor, at least one power supply terminal, and at least one output terminal, a switch circuit is adapted to carry out a charging operation upon the capacitor so that a charge is stored in the capacitor and then carry out a discharging operation upon the capacitor to discharge the charge to one of the power supply terminal and the output terminal in accordance with a digital input data signal.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: June 5, 2007
    Assignee: NEC Electronics Corporation
    Inventor: Koji Yoichi
  • Switched capacitor circuit type digital/analog converter capable of suppressing change of setting error
    Publication number: 20060139196
    Abstract: In a digital/analog converter of a switched capacitor circuit type including at least one capacitor, at least one power supply terminal, and at least one output terminal, a switch circuit is adapted to carry out a charging operation upon the capacitor so that a charge is stored in the capacitor and then carry out a discharging operation upon the capacitor to discharge'the charge to one of the power supply terminal and the output terminal in accordance with a digital input data signal.
    Type: Application
    Filed: December 27, 2005
    Publication date: June 29, 2006
    Applicant: NEC Electronics Corporation
    Inventor: Koji Yoichi