Patents by Inventor Ulf Axel Lindgren

Ulf Axel Lindgren 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).

  • Side-tone control within a telecommunication instrument
    Patent number: 6768795
    Abstract: A side-tone control unit for a telecommunication instrument is configured to include a side-tone amplifier having a transfer function selectively controlled in accordance with a set of amplifier parameters, and a side-tone controller, coupled to the side-tone amplifier, for selectively applying the set of amplifier parameters to the side-tone amplifier based on the detected energy of an uplink signal and the detected energy of a downlink signal. The side tone controller can select a particular set of amplifier parameters by indexing a table in accordance with quantized values of the detected uplink signal energy and the detected downlink signal energy.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: July 27, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Alberto Diego Jimenez Feltström, Mats Ormin, Ulf Axel Lindgren, Joakim Persson
  • Side-tone control within a telecommunication instrument
    Publication number: 20020090078
    Abstract: A side-tone control unit for a telecommunication instrument is configured to include a side-tone amplifier having a transfer function selectively controlled in accordance with a set of amplifier parameters, and a side-tone controller, coupled to the side-tone amplifier, for selectively applying the set of amplifier parameters to the side-tone amplifier based on the detected energy of an uplink signal and the detected energy of a downlink signal. The side tone controller can select a particular set of amplifier parameters by indexing a table in accordance with quantized values of the detected uplink signal energy and the detected downlink signal energy.
    Type: Application
    Filed: January 11, 2001
    Publication date: July 11, 2002
    Applicant: Telefonaktiebolaget L M Ericsson (publ).
    Inventors: Alberto Diego Jimenez Feltstrom, Mats Ormin, Ulf Axel Lindgren, Joakim Persson