Patents by Inventor Tadeuse A. Kwasniewski

Tadeuse A. Kwasniewski 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).

  • Multiple stage delta sigma modulator
    Patent number: 6570518
    Abstract: A delta sigma modulator which uses at least one quantizer having a dead zone. The dead zone quantizer outputs a zero when its input is within the dead zone range. It outputs a predetermined value if the input is above the dead zone range. If the input is below the dead zone range, the quantizer outputs another predetermined value. Ideally, the quantizer dead zone thresholds are complimentary in that the upper threshold for an input is the positive value of the lower threshold. Also, to save on accumulator bits, the delta sigma modulator selects a predetermined number of most significant bits at different stages.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: May 27, 2003
    Assignee: Skyworks Solutions, Inc.
    Inventors: Thomas A. D. Riley, Tadeuse A. Kwasniewski, Thierry Lepley
  • Delta-sigma modulator for fractional-N frequency synthesis
    Publication number: 20010035835
    Abstract: A delta sigma modulator which uses at least one quantizer having a dead zone. The dead zone quantizer outputs a zero when its input is within the dead zone range. It outputs a predetermined value if the input is above the dead zone range. If the input is below the dead zone range, the quantizer outputs another predetermined value. Ideally, the quantizer dead zone thresholds are complimentary in that the upper threshold for an input is the positive value of the lower threshold. Also, to save on accumulator bits, the delta sigma modulator selects a predetermined number of most significant bits at different stages.
    Type: Application
    Filed: January 4, 2001
    Publication date: November 1, 2001
    Inventors: Thomas A.D. Riley, Tadeuse A. Kwasniewski, Thierry Lepley