Patents by Inventor Christina L. Newman

Christina L. Newman 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).

  • Built in self test method and structure for analog to digital converter
    Patent number: 6229465
    Abstract: A method and structure for testing an A to D converter containing a plurality of discrete components is provided. The testing methodology includes dividing the circuit into a number of segments of the discrete components (for testing purposes only) with each segment having the same number of discrete components or an unequal but known number of discrete components. The value of the components individually and collectively of each segment is tested and compared with the value of the corresponding components of at least one other segment, and an output signal is generated of the compared value of the segments being tested. Preferably, the components are in a ladder configuration and are either resistors or capacitors.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: May 8, 2001
    Assignee: International Business Machines Corporation
    Inventors: Raymond J. Bulaga, Brooks A. Cummings, Douglas R. Firth, John L. Harris, Christina L. Newman, Donald L. Wheater