Patents by Inventor J. Brooks Thomas

J. Brooks Thomas 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).

  • Method of implementing digital phase-locked loops
    Patent number: 5602883
    Abstract: In a new formulation for digital phase-locked loops, loop-filter constants are determined from loop roots that can each be selectively placed in the s-plane on the basis of a new set of parameters, each with simple and direct physical meaning in terms of loop noise bandwidth, root-specific decay rate, and root-specific damping. Loops of first to fourth order are treated in the continuous-update approximation (B.sub.L T .fwdarw.0) and in a discrete-update formulation with arbitrary B.sub.L T. Deficiencies of the continuous-update approximation in large-B.sub.L T applications are avoided in the new discrete-update formulation.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: February 11, 1997
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Scott A. Stephens, J. Brooks Thomas