Patents by Inventor David Herbert Elwart, II

David Herbert Elwart, II 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).

  • Wideband Parasitic Capacitance Cancellation for High Speed Switches in Serial Communication
    Publication number: 20150372844
    Abstract: An apparatus for switching communication signals includes a pair of communication signal paths for carrying a differential serial communication signal. First and second pairs of switches are each respectively connected to the pair of communication signal paths to permit shared access to the pair of communication signal paths. A negative impedance converter (NIC) coupled to the communication signal paths produces negative capacitance to cancel parasitic capacitance associated with the switches. The NIC may be AC-coupled to the communication signal paths, and may employ a bipolar junction transistor (BJT) pair or other active devices.
    Type: Application
    Filed: December 15, 2014
    Publication date: December 24, 2015
    Inventor: David Herbert Elwart, II