Patents by Inventor Leslie D. Spruiell

Leslie D. Spruiell 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: 7076415
    Abstract: Circuit synthesis is performed utilizing an optimizer that selects design parameters for a synthesis model of a circuit based on desired performance characteristics and performance characteristics/design parameters of previously synthesized circuits. Performance characteristics and design parameters of each synthesized circuit are maintain in conjunction with the synthesis model of the circuit being synthesized. A synthesis plan identifies the synthesis model and specific instructions on how to perform optimized selection of design parameters, how to set up test benches, and how to perform the simulation.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: July 11, 2006
    Assignee: Cadence Design Systems, Inc.
    Inventors: Michael J. Demler, Stephen Lim, Geoffrey Ellis, Leslie D. Spruiell, Robert W. McGuffin, Bent H. Sorensen
  • Patent number: 6374390
    Abstract: A device for reducing evaluation time of a matrix representing an electrical circuit. Conductance values of each circuit component in the circuit are written to corresponding models utilizing non-blocking writing techniques. The matrix is represented by a reduced memory structure where each matrix node is represented by a matrix element structure having at least one pointer to a conductance value contained in a model structure corresponding to a circuit component that contributes to a value of the matrix node. A set of rows or columns of the matrix are then processed to calculate final matrix node values independently.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: April 16, 2002
    Assignee: Antrim Design Systems, Inc.
    Inventors: Thomas L. Quarles, S. Peter Liebmann, Leslie D. Spruiell
  • Patent number: 6356796
    Abstract: A Language Controlled Design Flow for the development of integrated circuits (IC) that allows users to Characterize, Synthesize, Simulate, and Analyze IC designs. The Language Controlled Design Flow provides specialized features that enable rapid design development and Intellectual Property (IP) reuse. The language provides the ability to capture a designer's knowledge about the Design Components and Design Processes unique to those components during characterization, synthesis, simulation, and analysis. A feature of this invention is the ability to separate design or design component specific knowledge from the tools used for analysis. This leads to benefits in extensibility, simplicity, accuracy, and performance of the overall tool set. Also provided is a mechanism in which the design process can be fully automated with a Language Controlled Design Flow that can take advantage of the information available in the design, in the design components, and in the design process flow.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: March 12, 2002
    Assignee: Antrim Design Systems, Inc.
    Inventors: Leslie D. Spruiell, Robert W. McGuffin, Bendt H. Sorensen, Michael J. Demler
  • Patent number: 6101323
    Abstract: A device for reducing evaluation time of a matrix representing an electrical circuit. Conductance values of each circuit component in the circuit are written to corresponding models utilizing non-blocking writing techniques. The matrix is represented by a reduced memory structure where each matrix node is represented by a matrix element structure having at least one pointer to a conductance value contained in a model structure corresponding to a circuit component that contributes to a value of the matrix node. A set of rows or columns of the matrix are then processed to calculate final matrix node values independently.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: August 8, 2000
    Assignee: Antrim Design Systems, Inc.
    Inventors: Thomas L. Quarles, S. Peter Liebmann, Leslie D. Spruiell