Patents by Inventor Dierk Eichner

Dierk Eichner 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 for ASK demodulation, and ASK demodulator
    Publication number: 20010033197
    Abstract: A method for demodulating a voltage which has been ASK modulated by changing the amplitude between a low level and a high level, in particular for use during contactless data transmission from a card reader/writer to a smart card, is described. The method is distinguished, in that, in an initialization phase, a first mean value is produced from the high voltage level and a stored partial voltage derived therefrom in order to detect a change to a low voltage level. The change to the low voltage level represents a start value and is detected by a subsequent comparison of the modulated voltage with the first mean value. In a subsequent demodulation phase, a second mean value is produced from the detected low voltage level and the high voltage level in order to demodulate the modulated voltage by comparing the modulated voltage with the second mean value.
    Type: Application
    Filed: May 7, 2001
    Publication date: October 25, 2001
    Inventors: Gerhard Nebel, Volker Gungerich, Andreas Blum, Uwe Weder, Dierk Eichner, Robert Reiner, Gerhard Schraud
  • Method for ASK demodulation, and ASK demodulator
    Patent number: 6307428
    Abstract: A method for demodulating a voltage which has been ASK modulated by changing the amplitude between a low level and a high level, in particular for use during contactless data transmission from a card reader/writer to a smart card, is described. The method is distinguished, in that, in an initialization phase, a first mean value is produced from the high voltage level and a stored partial voltage derived therefrom in order to detect a change to a low voltage level. The change to the low voltage level represents a start value and is detected by a subsequent comparison of the modulated voltage with the first mean value. In a subsequent demodulation phase, a second mean value is produced from the detected low voltage level and the high voltage level in order to demodulate the modulated voltage by comparing the modulated voltage with the second mean value.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: October 23, 2001
    Assignee: Infineon Technologies AG
    Inventors: Gerhard Nebel, Volker Güngerich, Andreas Blum, Uwe Weder, Dierk Eichner, Robert Reiner, Gerhard Schraud