Patents by Inventor Hellmut Noldge

Hellmut Noldge 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).

  • Patent number: 4751472
    Abstract: The invention relates to a high frequency amplifier for coupling a load with a tetrode which is used as the amplifier tube and which is provided with a regulating circuit with a set point adjuster for the anode voltage. The regulating circuit can also be influenced by a control variable as the set point feedforward which is dependent on the tetrode screen grid current and which is used for automatically matching the anode voltage to the operating conditions of the load. For the power dissipation of the screen grid and anode of the tetrode, a regulating circuit can be provided with a limitation of the controlling high frequency power dependent on the screen grid current.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: June 14, 1988
    Assignee: Herfurth GmbH
    Inventors: Karl H. Knobbe, Hellmut Noldge
  • Patent number: 4355286
    Abstract: A resonant circuit arrangement for anode resonant circuits in radio frequency output amplifiers. A transmitter tube is formed with a cylindrical grid electrode and, coaxial therewith, a hollow cylindrical anode member encircling the grid electrode. A first circular metal disk extends perpendicularly from the grid electrode beyond the anode member. A second circular metal disk, with a smaller external diameter than the first, extends perpendicularly from the outer surface of the anode member. A hollow metal cylinder extends from the peripheral edge of the first circular metal disk past the second circular metal disk. A third circular metal disk extends from the hollow metal cylinder parallel with the first and second circular metal disks and on the side of the second disk opposite the first disk. A fourth circular metal disk is positioned between and parallel to the third and fourth disks.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: October 19, 1982
    Assignee: Herfurth GmbH
    Inventors: Karl-Heinz Knobbe, Hellmut Noldge