Patents by Inventor Christer Alf Jansson

Christer Alf Jansson 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).

  • A/D converter calibration test sequence insertion
    Patent number: 7405681
    Abstract: An A/D converter stage including an A/D sub-converter connected to a D/A sub-converter (12) is calibrated by a method that inserts a calibration test sequence into the D/A sub-converter. This is accomplished by forcing (SW) the comparators (COMP1-COMP7) of the A/D sub-converter to generate and insert the sequence into the D/A sub-converter.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: July 29, 2008
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bengt Erik Jonsson, Christer Alf Jansson
  • Dynamic element matching in A/D converters
    Patent number: 6816103
    Abstract: An A/D converter stage including an A/D sub-converter connected to a D/A sub-converter provides dynamic element matching. This is accomplished by forcing comparators of the A/D sub-converter to generate a scrambled thermometer code.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: November 9, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bengt Erik Jonsson, Christer Alf Jansson
  • A/D converter calibration test sequence insertion
    Publication number: 20040075599
    Abstract: An A/D converter stage including an A/D sub-converter connected to a D/A sub-converter (12) is calibrated by a method that inserts a calibration test sequence into the D/A sub-converter. This is accomplished by forcing (SW) the comparators (COMP1-COMP7) of the A/D sub-converter to generate and insert the sequence into the D/A sub-converter.
    Type: Application
    Filed: August 18, 2003
    Publication date: April 22, 2004
    Inventors: Bengt Erik Jonsson, Christer Alf Jansson
  • Dynamic element matching in a/d converters
    Publication number: 20040051657
    Abstract: An A/D converter stage including an A/D sub-converter connected to a D/A sub-converter (12) provides dynamic element matching. This is accomplished by forcing (24) the comparators (COMP1-COMP7) of the A/D sub-converter to generate a scrambled thermometer code.
    Type: Application
    Filed: July 17, 2003
    Publication date: March 18, 2004
    Inventors: Bengt Erik Jonsson, Christer Alf Jansson