Patents by Inventor Thaddeus J. Schweiger

Thaddeus J. Schweiger 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).

  • Output protection scheme for unipolar constant current source
    Patent number: 5067045
    Abstract: A protection circuit for the output stage of an operational amplifier may utilize two diodes and two resistors. A circuit for protecting electronic components from the voltage on the cable has an operational amplifier having the signal connected to an input, a diode oriented to conduct the signal from an output of the operational amplifier to the cable, and a diode for shunting a voltage, of a polarity opposite the polarity of the signal, from a first conductor of the cable to a second conductor of the cable, and at least one resistor for limiting current flow to the second diode.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: November 19, 1991
    Assignee: Square D Company
    Inventor: Thaddeus J. Schweiger