Patents by Inventor Hendrik Roller

Hendrik Roller 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).

  • Automatic power level control circuit for a transceiver device
    Patent number: 7532869
    Abstract: An automatic power level control circuit provides output power control of a transmitter device as used in wireless LAN applications in that an output signal is detected and a corresponding control voltage of a DAC in the base band section is corresponding adjusted. Preferably, the measurement of the output power is carried out during a first transmit cycle and the DAC is adjusted after completion of the first transmit cycle and prior to the begin of a subsequent transmit cycle. Thus, a reliable output level control is obtained with a minimum number of radio frequency components, wherein the control loop shows an enhanced stability due to the time-discrete control operation.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: May 12, 2009
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Sebastian Ehrenreich, Lutz Dathe, Hendrik Roller
  • Automatic power level control circuit for a transceiver device
    Publication number: 20040198272
    Abstract: An automatic power level control circuit provides output power control of a transmitter device as used in wireless LAN applications in that an output signal is detected and a corresponding control voltage of a DAC in the base band section is corresponding adjusted. Preferably, the measurement of the output power is carried out during a first transmit cycle and the DAC is adjusted after completion of the first transmit cycle and prior to the begin of a subsequent transmit cycle. Thus, a reliable output level control is obtained with a minimum number of radio frequency components, wherein the control loop shows an enhanced stability due to the time-discrete control operation.
    Type: Application
    Filed: December 20, 2002
    Publication date: October 7, 2004
    Inventors: Sebastian Ehrenreich, Lutz Dathe, Hendrik Roller