Patents by Inventor Erik A. Eriksson

Erik A. Eriksson 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).

  • Method and apparatus for preventing erroneous echoelimination and equalization
    Patent number: 5189637
    Abstract: In a telecommunication system, erroneous echo-elimination and equalization resulting from non-linearities of a D/A-converter and an A/D-converter are prevented. An error signal (e.sub.n) updates an adaptive echo-elimination filter and an adaptive equalization filter. The error signal (e.sub.n) also adjusts the values of specific adjustable devices, such as capacitors, in the converters to compensate for non-linearities in the converters. The error signal is used by logic devices to adjust the converters in accordance with various algorithms.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: February 23, 1993
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventor: Erik A. Eriksson
  • Telecommunication terminal
    Patent number: 4598172
    Abstract: Telecommunication terminal with automatic switching from 4-wire to 2-wire operation. The terminal is provided with a voltage sensing circuit (5) sensing the way in which DC voltage is fed to the terminal, and in repsonse therto controlling switches (8,11) which switch the terminal to prevailing operation conditions.
    Type: Grant
    Filed: August 29, 1984
    Date of Patent: July 1, 1986
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: Erik A. Eriksson