Patents by Inventor Gerhard Zettl

Gerhard Zettl 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).

  • Receiver-end supplementary circuit for boundary scan in data transmission with differential signals
    Publication number: 20020172159
    Abstract: An input circuit which in the course of a boundary scan test makes an interruption in one or both signal feeds clearly detectable is proposed for integrated circuits with differential data inputs.
    Type: Application
    Filed: February 27, 2002
    Publication date: November 21, 2002
    Inventors: Wilhelm Koenig, Gerhard Zettl
  • Digital filter switch for data receiver
    Patent number: 4726041
    Abstract: A digital filter switch for use with a data receiver incorporates first and second squaring units connected to the outputs of first and second band-pass filters tuned to the separation and character frequencies in a signal transmission. The outputs of the squaring units are interconnected via an adder to the input of a low-pass filter, which produces the output data signal.
    Type: Grant
    Filed: July 3, 1986
    Date of Patent: February 16, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernd Prohaska, Hans-Dieter Schwartz, Rudolf Winkelmann, Gerhard Zettl