Patents by Inventor Charles T. Yarbrough, III

Charles T. Yarbrough, 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).

  • Patent number: 7535315
    Abstract: A dimensionally flexible sparse matrix comprising multiple ports connected to a plurality of interconnected universal switches is disclosed. Each universal switch has at least three terminals and is switchable to connect any pair or all three terminals together. The plurality of interconnected universal switches are independently switchable to connect any one or more ports of the sparse matrix to any subset of the other ports. The sparse matrix may also be configurable to duplicate the connectivity of a variety of dimensionally different switch matrices by designating a first subset of the multiple ports as row ports and a second subset of the remaining ports as column ports with the added flexibility of connecting row-to-row and/or column-to column. The small physical size of signal stubs in the universal switches results in a signal path between any pair of terminals that may be suitable for the transmission of signal frequencies greater than approximately 500 mega-hertz.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: May 19, 2009
    Assignee: National Instruments Corporation
    Inventors: Charles T. Yarbrough, III, James A. Reimund, Rajesh Sukumaran, Michel G. Haddad
  • Patent number: 7268642
    Abstract: A dimensionally flexible sparse matrix comprising multiple ports connected to a plurality of interconnected universal switches is disclosed. Each universal switch has at least three terminals and is switchable to connect any pair or all three terminals together. The plurality of interconnected universal switches are independently switchable to connect any one or more ports of the sparse matrix to any subset of the others ports. The sparse matrix may also be cofigurable to duplicate the connectivity of a variety of dimensionally different switch matrices by designating a first subset of the multiple ports as row ports and a second subset of the remaining ports as column ports with the added flexibilty of connecting row-to-row and/or column-to column. The small physical size of signals stubs in the univerals switches results in a signal path between any pair of terminals that may be suitable for the transmission of signal frequencies greater than approximately 500 mega-hertz.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: September 11, 2007
    Assignee: National Instruments Corporation
    Inventors: Charles T. Yarbrough, III, James A. Reimund, Michel G. Haddad, Rajesh Sukumaran