Patents by Inventor Davis Tsai

Davis Tsai 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).

  • Systems for automatic circuit routing with object oriented constraints
    Patent number: 8549459
    Abstract: In one embodiment of the invention, an object oriented autorouter is disclosed for routing nets in a circuit. The object oriented autorouter includes a routing data model (RDM); at least one routing engine, such as a single connection router (SCR), a topographical (TOPO) transformation engine, and a detail geometric (DETAIL) engine, and a command and control module (CCM) coupled together. The RDM reads and write data with a design database as well as reading one or more object oriented design constraints. Each of the routing engines have at least one action to operate on the design database to improve compliance of the circuit to a constraint. The CCM controls the overall routing process of the nets in the circuit and includes at least one director to invoke at least one of the routing engines to achieve compliance with one or more constraints.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: October 1, 2013
    Assignee: Cadence Design Systems, Inc.
    Inventors: Ken Wadland, Sean Bergan, Charles W. Grant, Glendine Kingsbury, Randall Lawson, Jelena Radumilo-Frankilin, Kota Sujan Reddy, Steve Russo, William Schilp, Davis Tsai, Keith Woodward, Richard Woodward, Jia Wu
  • Circuit autorouter with object oriented constraints
    Patent number: 7761836
    Abstract: In one embodiment of the invention, an object oriented autorouter is disclosed for routing nets in a circuit. The object oriented autorouter includes a routing data model (RDM); at least one routing engine, such as a single connection router (SCR), a topographical (TOPO) transformation engine, and a detail geometric (DETAIL) engine, and a command and control module (CCM) coupled together. The RDM reads and write data with a design database as well as reading one or more object oriented design constraints. Each of the routing engines have at least one action to operate on the design database to improve compliance of the circuit to a constraint. The CCM controls the overall routing process of the nets in the circuit and includes at least one director to invoke at least one of the routing engines to achieve compliance with one or more constraints.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: July 20, 2010
    Assignee: Cadence Design Systems, Inc.
    Inventors: Ken Wadland, Sean Bergan, Charles W. Grant, Glendine Kingsbury, Randall Lawson, Jelena Radumilo-Franklin, Kota Sujan Reddy, Steve Russo, William Schilp, Davis Tsai, Keith Woodward, Richard Woodward, Jia Wu