Patents by Inventor Donald D. Walker

Donald D. Walker 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).

  • Robust peak finder for sampled data
    Patent number: 8682946
    Abstract: A method for determining a peak value of a histogram or a sequence of sampled data is disclosed. The method may include fitting a curve to the sequence of data, the curve being modeled based on an orthonormal expansion; obtaining a differential curve, the differential curve describing changes in slope of the curve fitted to the sequence of data; finding at least one root for the differential curve; for each of the at least one root for the differential curve, calculating a corresponding value on the curve fitted to the sequence of data; and determining the peak value of the sequence of data based on a maximum value among the corresponding value calculated for each of the at least one root.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: March 25, 2014
    Assignee: KLA-Tencor Corporation
    Inventors: Harish P. Hiriyannaiah, Donald D. Walker