Patents by Inventor Shuuji Agatsuma

Shuuji Agatsuma 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).

  • Test mode enable circuit
    Patent number: 7795893
    Abstract: A test mode enable circuit for putting a device in a test mode includes a serial-to-parallel shift register reset by a reset signal, a decoder circuit, and a gate circuit. The shift register receives and converts a control signal in serial form to control data in parallel form. The decoder circuit receives and decodes the control data to a test mode enable signal that puts the device in the test mode. The decoder circuit outputs the test mode enable signal to the gate circuit only when the control data matches a predetermined key pattern. The gate circuit outputs the test mode enable signal to the device only when at least one of the control signal and the reset signal has a predetermined voltage level.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: September 14, 2010
    Assignee: DENSO CORPORATION
    Inventor: Shuuji Agatsuma
  • Test mode enable circuit
    Publication number: 20090315582
    Abstract: A test mode enable circuit for putting a device in a test mode includes a serial-to-parallel shift register reset by a reset signal, a decoder circuit, and a gate circuit. The shift register receives and converts a control signal in serial form to control data in parallel form. The decoder circuit receives and decodes the control data to a test mode enable signal that puts the device in the test mode. The decoder circuit outputs the test mode enable signal to the gate circuit only when the control data matches a predetermined key pattern. The gate circuit outputs the test mode enable signal to the device only when at least one of the control signal and the reset signal has a predetermined voltage level.
    Type: Application
    Filed: February 27, 2007
    Publication date: December 24, 2009
    Applicant: DENSO CORPORATION
    Inventor: Shuuji Agatsuma