Patents by Inventor David Ethridge

David Ethridge 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).

  • Low cost linearized channel amplifier for use with high power amplifiers
    Patent number: 6242976
    Abstract: A linearized channel amplifier comprising a linear channel amplifier circuit 20 and a nonlinear linearizer circuit located immediately before a high power amplifier. A common control circuit controls the linear channel amplifier circuit and the nonlinear linearizer circuit. The linearized channel amplifier functions as a driver amplifier and improves the linearity and efficiency performance of the high power amplifier across a desired frequency bandwidth. The linearized channel amplifier employs low cost temperature compensation circuits in an interface circuit and a temperature compensation network circuit, and uses a novel methodology to provide for command and control functions that includes a measurement, analytical calculation and setting process. An external personality plug may be to set the performance of the channel amplifier and linearizer.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: June 5, 2001
    Assignee: Space Systems/Loral, Inc.
    Inventors: Cindy Yuen, Steve S. Yang, Kevin Smith, Mark Adams, David Ethridge