Patents by Inventor James Gregerson

James Gregerson 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: 10691853
    Abstract: A system and method to perform timing analysis in integrated circuit development involves defining an integrated circuit design as nodes representing components of the integrated circuit design that are interconnected by edges representing wires. Sequentially connected nodes define a path. Statistical variables are defined for a canonical delay model of each node and edge of the integrated circuit design and define a first set of conditions. The method includes performing a statistical static timing analysis to obtain an arrival time at each node as a sum of the canonical delay models for nodes and edges that precede the node in the path of the node, obtaining a projected arrival time at a second set of conditions for the node by scaling the arrival time for the node using scale factors that represent the second set of conditions and using a transformation matrix, and providing the integrated circuit design for fabrication.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: June 23, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Eric Foreman, James Gregerson, Gregory Schaeffer, Michael H. Wood
  • Publication number: 20200134114
    Abstract: A system and method to perform timing analysis in integrated circuit development involves defining an integrated circuit design as nodes representing components of the integrated circuit design that are interconnected by edges representing wires. Sequentially connected nodes define a path. Statistical variables are defined for a canonical delay model of each node and edge of the integrated circuit design and define a first set of conditions. The method includes performing a statistical static timing analysis to obtain an arrival time at each node as a sum of the canonical delay models for nodes and edges that precede the node in the path of the node, obtaining a projected arrival time at a second set of conditions for the node by scaling the arrival time for the node using scale factors that represent the second set of conditions and using a transformation matrix, and providing the integrated circuit design for fabrication.
    Type: Application
    Filed: October 24, 2018
    Publication date: April 30, 2020
    Inventors: Eric Foreman, James Gregerson, Gregory Schaeffer, Michael H. Wood