Patents by Inventor Siegfried Heider

Siegfried Heider 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).

  • Method and arrangement for suppressing noise signals in a load supplied with direct voltage by a final controller
    Patent number: 4968928
    Abstract: A method and arrangement for suppressing noise having an alternating voltage component in a load supplied with a direct voltage signal by way of a control loop including a final controller connected to the load. The final controller is connected to the load by way of only an ohmic resistor. The signal at the output of the final controller contains an alternating voltage component of the noise. A signal proportional to the alternating voltage component of the noise in the load is formed in a branch circuit separate from the control loop supplying the load. The proportional signal is fed in phase opposition to the signal appearing at the output of the final controller ahead of the ohmic resistor with an amplitude corresponding to the amplitude of the alternating voltage component of the noise dropped across the ohmic resistor.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: November 6, 1990
    Assignee: ANT Nachrichtentechnik GmbH
    Inventor: Siegfried Heider