Patents by Inventor Melvin West, Jr.

Melvin West, Jr. 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).

  • Rf power amplifier with increased efficiency at low power
    Patent number: 5568094
    Abstract: An apparatus and method is provided that uses a simple voltage ratio technique to supply specific voltages to a voltage variable attenuator, and the gates of a GaAs RF power amplifier in order to control the efficiency of the amplifier. The output of the power amplifier is sampled and then fed back to the variable voltage attenuator as a control signal. A ratio portion of the control signal is then used to control the gate biases of the power amplifier. When the power requirements are less than maximum, the voltage ratio will become more negative, resulting in less current. As the RF output increases, the voltage ratio will become more positive. Therefore, as the DC voltage varies, the power amplifier's output power will vary accordingly providing the desired output power with enhanced efficiency.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: October 22, 1996
    Assignee: AT&T Corp.
    Inventors: John W. Bowen, Dwight Daugherty, Stuart H. Wemple, Melvin West, Jr.