Patents by Inventor Joerg Berthold

Joerg Berthold 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).

  • Tri-state-capable driver circuit
    Patent number: 5371423
    Abstract: A tri-state capable driver circuit or totem pole circuit is formed in BiCMOS technology and includes a selection circuit, first and second drive circuits, and first and second bipolar transistors. A short circuit unit is connected between the base and the emitter of the first bipolar transistor to prevent excessively high inhibit voltages across the base-emitter junction of the first bipolar transistor. The operation of the short circuit unit depends upon signals received at the tri-state activation input.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: December 6, 1994
    Assignee: Siemens Aktiengesellschaft
    Inventors: Joerg Berthold, Gerhard Nebel, Doris Schmitt-Landsiedel