Patents by Inventor Ross J. Wilkinson

Ross J. Wilkinson 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).

  • Cartesian loop transmitter
    Patent number: 6381286
    Abstract: A Cartesian loop transmitter for transmitting baseband signals is disclosed. The disclosed Cartesian loop includes a forward path having a first input for receiving the baseband signals and a second input and a feedback path having an input from the forward path. The forward path including an upconverter to upconvert the input signals to a signal to be transmitted, an attenuator having selectable attenuation and a plurality of power amplifier stages. The feedback path including a pin diode attenuator having selectable attenuation and a downconverter to downconvert the input from the forward path. The feedback path provides an error signal indicative of the non-linearity of the forward path to the second input of the forward path.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: April 30, 2002
    Assignee: University of Bristol
    Inventors: Ross J. Wilkinson, Peter B. Kenington, Joseph P. McGeehan, Mark A. Beach, Andrew Bateman