Patents by Inventor Ryouhei Inoue

Ryouhei Inoue 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).

  • Patent number: 6539529
    Abstract: Disclosed are a method and an apparatus for designing an integrated circuit, as well as a storage medium for storing the method, whereby repeaters are laid out automatically without overlapping with existing circuit blocks. A set of layout data is input to let the repeaters fully occupy provisionally regions that are free of circuit blocks and ready to accommodate the repeaters. Another set of layout data is generated based on the input layout data to calculate locations in which to insert the repeaters within wiring patterns that fail to meet wiring delay requirements. From among the provisionally laid-out repeaters, those that are closest to the calculated positions are selected. Data about connections of the selected repeaters are added to a net list to update the latter. Data about the layout of the unselected repeaters are removed from the layout data in effect after the provisional layout.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: March 25, 2003
    Assignee: Sony Corporation
    Inventors: Motoji Ebisawa, Arata Yamamoto, Ryouhei Inoue
  • Publication number: 20020068989
    Abstract: Disclosed are a method and an apparatus for designing an integrated circuit as well as a storage medium for storing the method, whereby repeaters are laid out automatically without overlapping with existing circuit blocks. A set of layout data is input to let the repeaters fully occupy provisionally regions that are free of circuit blocks and ready to accommodate the repeaters Another set of layout data is generated based on the input layout data to calculate locations in which to insert the repeaters within wiring patterns that fail to meet wiring delay requirements. From among the provisionally laid-out repeaters, those that are closest to the calculated positions are selected. Data about connections of the selected repeaters are added to a net list to update the latter. Data about a layout of the unselected repeaters are removed from the layout data in effect after the provisional layout.
    Type: Application
    Filed: October 25, 2001
    Publication date: June 6, 2002
    Inventors: Motoji Ebisawa, Arata Yamamoto, Ryouhei Inoue