Patents by Inventor Daisuke Onishi

Daisuke Onishi 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).

  • Video signal output circuit and electronic device using the same
    Patent number: 7940335
    Abstract: A video signal output circuit includes a sync-tip clamp circuit fixing a sync-tip level of an input video signal at a constant voltage, a low-pass filter receiving the video signal output from the sync-tip clamp circuit and eliminating a predetermined high-frequency component, a dummy circuit receiving the video signal output from the sync-tip clamp circuit and outputting the video signal having substantially the same sync-tip level as that of the video signal output from the low-pass filter, and an output driver receiving the video signal output from the low-pass filter and outputting the video signal with a low output impedance. The sync-tip clamp circuit controls the sync-tip level of the video signal output from the dummy circuit such that the sync-tip level of the video signal is equal to a predetermined reference voltage.
    Type: Grant
    Filed: July 4, 2005
    Date of Patent: May 10, 2011
    Assignee: Rohm Co., Ltd.
    Inventors: Kinya Takama, Daisuke Onishi
  • Video Signal Output Circuit and Electronic Device Using the Same
    Publication number: 20080002057
    Abstract: A video signal output circuit (1) includes a sync-tip clamp circuit (3) fixing a sync-tip level of an input video signal at a constant voltage, a low-pass filter (4) receiving the video signal output from the sync-tip clamp circuit (3) and eliminating a predetermined high-frequency component, a dummy circuit (5) receiving the video signal output from the sync-tip clamp circuit (3) and outputting the video signal having substantially the same sync-tip level as that of the video signal output from the low-pass filter (4), and an output driver (6) receiving the video signal output from the low-pass filter (4) and outputting the video signal with a low output impedance. The sync-tip clamp circuit (3) controls the sync-tip level of the video signal output from the dummy circuit (5) such that the sync-tip level of the video signal is equal to a predetermined reference voltage (VREF).
    Type: Application
    Filed: July 4, 2005
    Publication date: January 3, 2008
    Applicant: ROHM CO., LTD.
    Inventors: Kinya Takama, Daisuke Onishi