Patents by Inventor Mark P. Barker

Mark P. Barker 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).

  • Circuit and method for regulating output voltage of a switch mode power supply having a current mode magnetic amplifier
    Patent number: 4931920
    Abstract: A circuit for regulating the output voltage of a switched mode power supply having a current mode magnetic amplifier includes a current transformer for sensing current flow through the magnetic amplifier. The sensed current is provided to a circuit which includes a resistor for developing a pulsating voltage and a storage capacitor for converting the pulsating voltage to a tracking voltage and storing the tracking voltage. The tracking voltage and a reference voltage are provided to a differential amplifier, the output of which operates a transistor which controls the operation of the magnetic amplifier, thereby regulating the output voltage of the power supply.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: June 5, 1990
    Assignee: NCR Corporation
    Inventor: Mark P. Barker