Patents by Inventor Atsuya OHASHI

Atsuya OHASHI 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).

  • Driver circuit for preventing overshoot and undershoot due to parasitic capacitance
    Patent number: 8674742
    Abstract: A second driver is provided in addition to a first driver outputting an output signal in accordance with a voltage of an input signal. When the output signal changes from a first voltage level to a second voltage level in accordance with a voltage change of the input signal, a control part controls the second driver to assist the signal change during a period from a change start time until the output signal exceeds a third voltage level. The control part controls the second driver to suppress the signal change during a period from the time when the output signal exceeds the third voltage level until it reaches the second voltage level.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: March 18, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Atsuya Ohashi, Koji Kimura
  • SEMICONDUCTOR DEVICE
    Publication number: 20130038372
    Abstract: A second driver is provided in addition to a first driver outputting an output signal in accordance with a voltage of an input signal. When the output signal changes from a first voltage level to a second voltage level in accordance with a voltage change of the input signal, a control part controls the second driver to assist the signal change during a period from a change start time until the output signal exceeds a third voltage level. The control part controls the second driver to suppress the signal change during a period from the time when the output signal exceeds the third voltage level until it reaches the second voltage level.
    Type: Application
    Filed: June 29, 2012
    Publication date: February 14, 2013
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Atsuya OHASHI, Koji KIMURA