Patents by Inventor Frederick B. Davis, III

Frederick B. Davis, III 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).

  • Analog signal multiplexer with noise rejection
    Patent number: 5045851
    Abstract: In analog multiplexers using solid state multiplexing relays and having a shunt capacitor circuit across each input channel as part of a filter for normal mode noise, common mode noise is rejected by opening the shunt capacitor circuit in at least the selected channel and preferably all channels during the switching cycle of each channel for a full cycle of the a.c. line frequency, the opening spanning the deselection time for the selected channel and the selection time for the next channel.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: September 3, 1991
    Assignee: General Signal Corporation
    Inventors: Frederick B. Davis, III, Stephen P. Glaudel, Sanjay Jhunjhunwala