Patents by Inventor Jeffrey T. Lum

Jeffrey T. Lum 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).

  • Time base and delay control
    Patent number: 4000439
    Abstract: A display control circuit for automatically displaying a sampled test signal on a CRT display, or the like, where the test signal is received at an unknown period following a trigger. The circuit first establishes a base line referenced level, then the sampling of the test signal is controlled by a varied pedestal voltage or counter potential until the magnitude of the sampled test signal exceeds the base line reference level by a predetermined potential. The pedestal voltage or counter potential required to establish this predetermined potential is used for delaying the start of the display sweep following the trigger.
    Type: Grant
    Filed: July 17, 1975
    Date of Patent: December 28, 1976
    Assignee: Autek Systems Corporation
    Inventors: Samuel R. McCutcheon, Jeffrey T. Lum, Auber G. Ryals