Patents by Inventor Wilfried von der Ohe

Wilfried von der Ohe 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).

  • Switched mode power supply
    Patent number: 4595977
    Abstract: A switched mode power supply, particularly for a television receiver with standby operation, including a protection circuit for limiting the current on the primary side of the power supply transformer and preferably also a protection circuit against too high a voltage on the secondary side of the transformer. According to the invention, a further protection circuit including a thyristor is provided on the primary side so as to periodically block the switching transistor of the power supply oscillator when the current on the primary side becomes too high and exceeds the limit value.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: June 17, 1986
    Assignee: Telefunken Fernseh und Rundfunk GmbH
    Inventor: Wilfried von der Ohe