Patents by Inventor Brian D. Wiseman

Brian D. Wiseman 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 and apparatus for controlling gain of a power amplifier
    Patent number: 5892396
    Abstract: A method and apparatus for controlling the gain of a power amplifier wherein the method includes the steps of attenuating, detecting, and comparing. An attenuator (108) attenuates an amplified version of a radio frequency signal to an attenuated level. A single detector (109) alternatively detects the radio frequency signal power level at a power amplifier (101) input and the attenuated version of the amplified radio frequency signal. The detector (109) produces a first and a second signal each having a DC level representing the detected power levels. An operation amplifier configured for closed loop operation compares the DC levels of the first and second signals to produce a control signal (102) for controlling power amplifier (101) gain. Filters (119) and (120) filter the first and second signals before the comparing step.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: April 6, 1999
    Assignee: Motorola, Inc.
    Inventors: Mark B. Anderson, Brian D. Wiseman