Patents by Inventor Andrew D. Gubisch

Andrew D. Gubisch 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).

  • Precision voltage/current/power source
    Patent number: 5642300
    Abstract: In the precision source disclosed herein, a reference waveform and a correction waveform are combined and fed to an output amplifier which supplies an output waveform to a load, e.g., a wattmeter under test. The reference and correction waveforms are generated by digital-to-analog conversion of values stored in respective data tables. The output waveform is then combined with the reference waveform to obtain an error signal which is then digitized and utilized to update the data table from which the correction waveform is generated.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: June 24, 1997
    Assignee: Rotek Instrument Corp.
    Inventors: Andrew D. Gubisch, James L. West, Petar Miljanic, Paul L. Lualdi, Jr.