Patents by Inventor Roy O. Mitchell

Roy O. Mitchell 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).

  • Patent number: 4876484
    Abstract: A cathode drive circuit couples a video drive signal from a cathode output amplifier to the cathode of a cathode ray tube along a first matched transmission line. Any signal energy not absorbed by the cathode is coupled along a second matched transmission line to a power dissipating load. The use of matched transmission lines avoids reflections in the system and eliminates attendant signal degradation. The power dissipating load can be located at any distance remote from both the cathode output amplifier and the cathode so as to minimize heat dissipation problems.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: October 24, 1989
    Assignee: Tektronix, Inc.
    Inventors: Roy O. Mitchell, Milton D. Klaudt, Kathleen F. M. Ullom