Patents by Inventor David L. Skinner

David L. Skinner 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).

  • Modulation scheme for switching amplifiers to reduce filtering requirements and crossover distortion
    Patent number: 6727752
    Abstract: A modulation scheme can drive an associated load that is coupled between a pair of outputs by providing a switching signal at one of the outputs and a non-switching signal at the other output independent of the direction of current relative to the respective outputs. Because switching occurs only at one of the outputs in this mode of operation, a single filter can be used to mitigate switching noise at the switching output. Another aspect relates to another mode of operation in which one or both of the outputs can be controlled to operate linearly, such as during a zero crossing condition, so as to help reduce crossover distortion.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: April 27, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: David L. Skinner, Wayne Tien-Feng Chen, David A. Grant, Vadim Ivanov
  • Modulation scheme for switching amplifiers to reduce filtering requirements and crossover distortion
    Publication number: 20030222713
    Abstract: A modulation scheme can drive an associated load that is coupled between a pair of outputs by providing a switching signal at one of the outputs and a non-switching signal at the other output independent of the direction of current relative to the respective outputs. Because switching occurs only at one of the outputs in this mode of operation, a single filter can be used to mitigate switching noise at the switching output. Another aspect relates to another mode of operation in which one or both of the outputs can be controlled to operate linearly, such as during a zero crossing condition, so as to help reduce crossover distortion.
    Type: Application
    Filed: May 29, 2002
    Publication date: December 4, 2003
    Inventors: David L. Skinner, Wayne Tien-Feng Chen, David A. Grant, Vadim Ivanov
  • Rubber grousered track shoe
    Patent number: 5482365
    Abstract: A long life rubber grousered track shoe for track-type machines is disclosed. The track shoe has a steel shoe portion and a rubber grouser portion that is molded in situ to the steel shoe portion between a pair of steel grouser bars to protect the rubber grouser from undue shear loads.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: January 9, 1996
    Assignee: Caterpillar Inc.
    Inventors: Thomas L. Peterson, Larry K. Rhodes, Thomas C. Robertson, David L. Skinner
  • Calcium carbonate filler
    Patent number: 4170658
    Abstract: An improved calcium carbonate filler in the form of a powder having a particle size distribution range and other identifiable physical characteristics produces unexpected results as a filler in resin molding compounds.
    Type: Grant
    Filed: January 28, 1976
    Date of Patent: October 9, 1979
    Assignee: The Georgia Marble Company
    Inventors: David L. Skinner, Edward L. Moon
  • Method of producing organic short fibers and treatment thereof with a silane
    Patent number: 4124730
    Abstract: The present invention concerns a novel method of making short silane treated inorganic glass fibers and mineral wool fibers with a very low shot content and the fibers thus produced.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: November 7, 1978
    Assignee: Jim Walter Resources, Inc.
    Inventors: Frank D. Albert, Alan P. Conroy, David L. Skinner
  • Process for making uniform short non-cellulosic fibers
    Patent number: 4026478
    Abstract: The present invention concerns a novel method of making short inorganic glass fibers and mineral wool fibers with a very low shot content and the fibers thus produced.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: May 31, 1977
    Assignee: Jim Walter Corporation
    Inventors: Frank D. Albert, Alan P. Conroy, David L. Skinner