Patents by Inventor Mattias Duppils

Mattias Duppils 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: 6414541
    Abstract: A switched-capacitor circuit includes a plurality of sequentially-operated switched-capacitors A first capacitor is arranged to be coupled and thereafter uncoupled to an input signal during a first time period. Thereby the first capacitor is charged to an input value in dependence on the input signal. A second capacitor is arranged to be coupled and thereafter uncoupled to the first capacitor during a second time period for charge distribution between the second and first capacitor. Pairwise charge distribution is possibly done with further sequentially-operated switched capacitors. A final capacitor is arranged to be coupled and thereafter uncoupled to a previous capacitor during the final time period for charge distribution between the final and the previous capacitor. The switched-capacitor circuit further includes selectively coupling the first and the second sequentially-operated switched-capacitors to an output circuit thereby enabling a desired weighting of the input signal to be attained.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: July 2, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ragnar Arvidsson, Mattias Duppils, Jan-Erik Eklund