Patents by Inventor Lars-Peter Kunkel

Lars-Peter Kunkel 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).

  • Electronic circuit for and a method of controlling the output frequency of a frequency synthesizer
    Publication number: 20020024393
    Abstract: The invention relates to: An electronic circuit for controlling the output frequency from a frequency synthesizer, said output frequency being based on a reference frequency from a voltage controlled crystal oscillator (VCXO), the latter being regulated by a D/A converter controlled by a processing circuit that monitors a frequency error. The invention further relates to a method and a computer program, a computer readable medium and a dual mode mobile telephone. The object of the present invention is to provide a simple and economic scheme for overcoming the temperature limitations of a VCXO based frequency synthesizer.
    Type: Application
    Filed: August 24, 2001
    Publication date: February 28, 2002
    Inventor: Lars-Peter Kunkel
  • Multiple-mode direct conversion receiver
    Patent number: 6029052
    Abstract: A multiple-mode receiver incorporating direct conversion (processing received signals using intermediate frequencies within the same frequency range as the received signal bandwidth) rather than superheterodyne circuitry, allowing receiver hardware components to be re-used rather than replicated for each band. Various embodiments are disclosed in which low pass filters, mixers, quadrature generators, oscillators, and amplifiers are re-used.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: February 22, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Martin Isberg, Bjorn Lindquist, Peter Jakobsson, Jan Celander, Kjell Gustafsson, Lars-Peter Kunkel, Torsten Carlsson, Jacob Mannerstr.ang.le