Patents by Inventor Boris V. Razmyslovitch

Boris V. Razmyslovitch 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).

  • Calibrating a digital-to-analog converter
    Patent number: 7443323
    Abstract: Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: October 28, 2008
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Christian J. Rotchford, Brandt Braswell, Jiangbo Gan, Michael L. Gomez, Gerald P. Miaille, Boris V. Razmyslovitch
  • Calibrating a digital-to-analog converter
    Publication number: 20080165040
    Abstract: Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.
    Type: Application
    Filed: January 10, 2007
    Publication date: July 10, 2008
    Inventors: Christian J. Rotchford, Brandt Braswell, Jiangbo Gan, Michael L. Gomez, Gerald P. Miaille, Boris V. Razmyslovitch