Patents by Inventor Lasse Alestalo

Lasse Alestalo 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).

  • Linearization method and amplifier arrangement
    Patent number: 6970041
    Abstract: The invention relates to a linearization method and an amplifier arrangement for linearizing an amplifier (50) amplifying an RF signal with a variable envelope. The amplifier arrangement comprises a sampling device (20) for sampling an RF signal to be amplified. The amplifier arrangement further comprises a control device (30) arranged to generate, using samples, an output signal changing its value according to the envelope shape of the RF signal to be amplified. The amplifier arrangement further comprises an adjusting device (40) arranged to adjust, using the output signal, the bias current of the amplifier such that the magnitude of the output signal and the magnitude of the bias current change in the same direction.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: November 29, 2005
    Assignee: Elektrobit Oy
    Inventors: Riku Ikonen, Lasse Alestalo
  • Linearization method and amplifier arrangement
    Publication number: 20040012443
    Abstract: The invention relates to a linearization method and an amplifier arrangement for linearizing an amplifier (50) amplifying an RF signal with a variable envelope. The amplifier arrangement comprises a sampling device (20) for sampling an RF signal to be amplified. The amplifier arrangement further comprises a control device (30) arranged to generate, using samples, an output signal changing its value according to the envelope shape of the RF signal to be amplified. The amplifier arrangement further comprises an adjusting device (40) arranged to adjust, using the output signal, the bias current of the amplifier such that the magnitude of the output signal and the magnitude of the bias current change in the same direction.
    Type: Application
    Filed: April 29, 2003
    Publication date: January 22, 2004
    Inventors: Riku Ikonen, Lasse Alestalo