Patents by Inventor Francis W. Larson

Francis W. Larson 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).

  • High speed solid state multiplexer
    Patent number: 4524443
    Abstract: A multiplexing apparatus for outputting selected input signals utilizes input transistors coupled between input sources and diodes. A first set of switching transistors, coupled to the input transistors and the diodes, blocks the outputting of nonselected input signals by applying a predetermined voltage to the anodes of corresponding diodes. A second set of switching transistors, coupled to the input transistors and the diodes, permits the outputting of selected input signals on the emitters of output transistors coupled to the diodes, by applying current to the emitters of corresponding input transistors, and the anodes of corresponding diodes.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: June 18, 1985
    Assignee: Sperry Corporation
    Inventors: David R. Crocker, Desi D. Stelling, Francis W. Larson