Patents by Inventor Justin David John Penfold

Justin David John Penfold 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).

  • Phase shifting arrangement for generating mutually orthogonal signals
    Patent number: 6680639
    Abstract: The present invention is directed to a phase shifting arrangement for generating a set of mutually orthogonal signals. In one aspect, the invention provides a system that includes a phase shifting unit for receiving an input signal. The phase shifting unit includes a first phase shift circuit for generating a first output signal phase-shifted by a first amount with respect to the input signal, a second phase shift circuit for generating a second output signal phase-shifted by a second amount with respect to the input signal, and a third phase shift circuit for generating a third output signal phase-shifted by a third amount with respect to the input signal.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: January 20, 2004
    Assignee: Cambridge Silicon Radio Ltd.
    Inventors: James Digby Yarlet Collier, Justin David John Penfold