Patents by Inventor Robert Caulfield

Robert Caulfield 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).

  • Patent number: 7764758
    Abstract: An apparatus generally comprising a first circuit, a second circuit and a third circuit is shown. The first circuit may be configured to generate a phase signal by dividing each cycle of an output clock into a plurality of phase values. The second circuit may be configured to generate an intermediate data signal by interpolating an input data signal sampled with an input clock in response to the phase signal and the output clock. The third circuit configured to generate an output data signal by sampling the intermediate data signal with the output clock.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: July 27, 2010
    Assignee: LSI Corporation
    Inventors: Dean L. Raby, Robert Caulfield
  • Patent number: 7199843
    Abstract: A system for providing spectral compensation for vestigial sideband, VSB, signals with carrier frequency error. The VSB signal is sampled and digitized. The carrier frequency of the digitized signal is translated to a selected IF frequency. A fixed frequency VSB filter is then used to provide spectral compensation for the signal.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: April 3, 2007
    Assignee: LSI Logic Corporation
    Inventors: Dean Raby, Robert Caulfield
  • Publication number: 20040151267
    Abstract: An apparatus generally comprising a first circuit, a second circuit and a third circuit is shown. The first circuit may be configured to generate a phase signal by dividing each cycle of an output clock into a plurality of phase values. The second circuit may be configured to generate an intermediate data signal by interpolating an input data signal sampled with an input clock in response to the phase signal and the output clock. The third circuit configured to generate an output data signal by sampling the intermediate data signal with the output clock.
    Type: Application
    Filed: January 30, 2003
    Publication date: August 5, 2004
    Applicant: LSI LOGIC CORPORATION
    Inventors: Dean L. Raby, Robert Caulfield