Patents by Inventor Shuuichi Nagaya

Shuuichi Nagaya 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).

  • Buffer Circuit and control method thereof
    Patent number: 7646221
    Abstract: A buffer circuit permitting an input signal to pass and prohibiting the input signal from passing corresponding to an output control signal, including an output switching device, a control portion having a first switching circuit controlling the output switching device into conductive state and a second switching circuit controlling the output switching device into non-conductive state, and controlling the output switching device into the conductive state or non-conductive state corresponding to the input signal and the output control signal, wherein a connecting point between the first switching circuit and the second switching circuit is coupled to the output switching device, and a changing portion connected to the second switching circuit in series and limiting the drive capacity of the output switching device when the output control signal is in an output prohibition state of prohibiting the input signal from passing.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: January 12, 2010
    Assignee: Fujitsu Microelectronics Limited
    Inventors: Toyoki Suzuki, Mitsuaki Tomida, Shuuichi Nagaya
  • Buffer circuit and control method thereof
    Publication number: 20080079475
    Abstract: A buffer circuit permitting an input signal to pass and prohibiting the input signal from passing corresponding to an output control signal, including an output switching device, a control portion having a first switching circuit controlling the output switching device into conductive state and a second switching circuit controlling the output switching device into non-conductive state, and controlling the output switching device into the conductive state or non-conductive state corresponding to the input signal and the output control signal, wherein a connecting point between the first switching circuit and the second switching circuit is coupled to the output switching device, and a changing portion connected to the second switching circuit in series and limiting the drive capacity of the output switching device when the output control signal is in an output prohibition state of prohibiting the input signal from passing.
    Type: Application
    Filed: September 24, 2007
    Publication date: April 3, 2008
    Inventors: Toyoki Suzuki, Mitsuaki Tomida, Shuuichi Nagaya