Patents by Inventor Koshi Ninomiya

Koshi Ninomiya 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).

  • Vertical sync signal separator circuit and multi-sync monitor using the same
    Patent number: 5805232
    Abstract: The present invention includes a capacitor, a charge/discharge circuit for generating a charging current having a value increasing with the increase of the frequency of the horizontal sync signal to charge the capacitor in a time period of the horizontal sync signal and a time period of the vertical sync signal. The charge/discharge circuit discharges the capacitor in other time periods to reduce a difference of the horizontal sync signal frequency. A comparator compares the voltage of the capacitor with a predetermined reference voltage to detect the vertical sync signal.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: September 8, 1998
    Assignee: Rohm Co., Ltd.
    Inventor: Koshi Ninomiya