Patents by Inventor Hermann Stallbaumer

Hermann Stallbaumer 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).

  • Circuitry for superimposing small, low energy signals and large, essentially higher energy signals
    Patent number: 5535273
    Abstract: A circuitry is disclosed for superimposing small, low energy (2) and large substantially higher energy (3) signals, in particular for transmitting speech signals with a remote supply direct signal for a receiving circuit or with a high energy alternating signal, for example a call alternating voltage for signaling. The circuitry includes an operational amplifier (1), having one input connected to a pole of a source supplying the small signal and operational voltage inputs being connected to a voltage supply source. In order to allow low energy, weak signals, such as speech signals, and high energy signals and direct voltages to be transmitted by such a circuitry over a subscriber line by means of simple components, the second pole of the small signal source (2) is connected to the second input of the operational amplifier (1) and one pole of a higher energy signal supply source (3) is connected to one pole of the voltage supply source (V).
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: July 9, 1996
    Assignee: SEMCOTEC Handelsgesellschaft m.b.H.
    Inventors: Wilfried Kausel, Hannes Kremser, Hermann Stallbaumer, Werner Winkler