Patents by Inventor Karl Håkan Torbjörn Johansson-Gardenfors

Karl Håkan Torbjörn Johansson-Gardenfors 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).

  • Radio transceiver on a chip
    Patent number: 7149191
    Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: December 12, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Håkan Torbjörn Johansson-Gardenfors, Sven Mattisson, Jacobus Cornelis Haartsen
  • Radio transceiver on a chip
    Patent number: 6633550
    Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: October 14, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Håkan Torbjörn Johansson Gärdenfors, Sven Mattisson, Jacobus Cornelis Haartsen