Patents by Inventor Chi-Min Chu

Chi-Min Chu 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).

  • Pre-route and post-route net correlation with defined patterns
    Patent number: 8336015
    Abstract: A method of improving pre-route and post-route correlation can include performing an initial placement, virtual routing, and lower-effort actual routing for the design. The results of the virtual routing and lower-effort actual routing can be compared to identify nets having miscorrelation. Based on the nets having at least a predetermined miscorrelation, one or more patterns can be defined. At this point, net routing constraints and/or scaling factors can be assigned to nets matching the defined patterns. These net routing constraints and scaling factors can be applied to the nets of the design that match the patterns. Optimized placement and a higher-effort actual routing of the design can be performed using the nets with the applied net routing constraints and scaling factors. An optimized, routed design can be generated as output.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: December 18, 2012
    Assignee: Synopsys, Inc.
    Inventors: Changge Qiao, Chi-Min Chu, Jing C. Lin
  • Pre-Route And Post-Route Net Correlation With Defined Patterns
    Publication number: 20110061038
    Abstract: A method of improving pre-route and post-route correlation can include performing an initial placement, virtual routing, and lower-effort actual routing for the design. The results of the virtual routing and lower-effort actual routing can be compared to identify nets having miscorrelation. Based on the nets having at least a predetermined miscorrelation, one or more patterns can be defined. At this point, net routing constraints and/or scaling factors can be assigned to nets matching the defined patterns. These net routing constraints and scaling factors can be applied to the nets of the design that match the patterns. Optimized placement and a higher-effort actual routing of the design can be performed using the nets with the applied net routing constraints and scaling factors. An optimized, routed design can be generated as output.
    Type: Application
    Filed: January 29, 2010
    Publication date: March 10, 2011
    Applicant: Synopsys, Inc.
    Inventors: Changge Qiao, Chi-Min Chu, Jing C. Lin