Patents by Inventor Rodney M. Phelps

Rodney M. Phelps 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: 7493574
    Abstract: Method and system for improving yield of an integrated circuit are disclosed. The method includes optimizing a design of the integrated circuit according to a set of predefined design parameters to generating design points that meet a set of predefined design specifications, analyzing the design points to form clusters comprising the design points, determining a representative design point from the clusters comprising the design points, running a statistical simulation to determine a yield of the design using the representative design point and a statistical model of manufacturing process variations, generating statistical corners in accordance with results of the statistical simulation, and optimizing the design in accordance with the statistical corners using an iterative process.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: February 17, 2009
    Assignee: Cadence Designs Systems, Inc.
    Inventors: Hongzhou Liu, Rodney M. Phelps
  • Patent number: 7346868
    Abstract: Method and system for evaluating design costs of an integrated circuit are disclosed. The method includes choosing a design point for evaluation, dividing circuit specifications of the design point into at least two groups comprising a first group of specifications and a second group of specifications, computing a first set of design costs for the first group of specifications, estimating a second set of design costs for the second group of specifications using a predetermined set of reference costs, and determining a design cost of the design point using the first set of design costs and the second set of design costs.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: March 18, 2008
    Assignee: Cadence Design Systems, Inc.
    Inventors: Rodney M. Phelps, Hongzhou Liu, Amith Singhee