Patents by Inventor Eckard Tiwald

Eckard Tiwald 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).

  • Circuit arrangement for testing parts of a digital time-division telecommunication switching center, particularly a telephone switching center
    Patent number: 5138608
    Abstract: A receiving circuit for evaluating check words received after traversing a test loop for coincidence with the check word transmitted is utilized in time-division multiplex operation for the sequencing of test implemented in parallel and is reached via a multiplex line on which a defined time slot is allocated to each of the tests.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: August 11, 1992
    Assignee: Siemens Aktiengesellschaft
    Inventors: Walter Kucera, Werner Nagler, Eckard Tiwald
  • Method for measuring the bit error rate in the transmission of digital information
    Patent number: 5081666
    Abstract: For generating test words that are sent across a test loop and are monitored at the receiving side for coincidence and with the corresponding, transmitted test word, a memory is read in which such test words that preferably correspond to test words generated by a pseudo-random generator are stored. In the course of the monitoring, the memory is read again under the same address as in the transmission, but delayed by the running time of the test loop, in order to supply the test word that is to be compared to the received test word.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: January 14, 1992
    Assignee: Siemens Aktiengesellschaft
    Inventors: Emil-Franz Blaschek, Werner Nagler, Eckard Tiwald