Patents by Inventor Helmut Brock

Helmut Brock 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).

  • Load independent current feeding circuit
    Patent number: 5138248
    Abstract: A circuit having a load connected to ground, a measuring resistor connected in series with the load; a current source feeding current into the load and the resistor, a different amplifier having one output connected to one end of the resistor and having its output connected to a summing point which is an input from the current source, a reference voltage source having one end connected to the summing point, is improved by an impedance converter having its input circuit connected to another end of the resistor and its output connected to another input for the differential amplifier, the latter output being further connected to an opposite end of the reference voltage source thus serving as floating ground for the reference source and the differential amplifier.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: August 11, 1992
    Assignee: Hartmann & Braun AG
    Inventors: Reinhard Vogt, Helmut Brock, Wolfgang Freitag