Patents by Inventor Barbara Jean Duffner

Barbara Jean Duffner 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).

  • Write level training using dual frequencies in a double data-rate memory device interface
    Patent number: 8937846
    Abstract: A write leveling calibration system and method for double data-rate dynamic random access memory includes performing write leveling at two different frequencies to determine to which of two successive rising clock cycle edges each data strobe signal would be aligned as a result of applying the write leveling delay determined by the write-leveling procedure. The determination can then be used to ensure that the data strobe signals of all source synchronous groups are aligned with the same edge of the clock signal.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: January 20, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Barbara Jean Duffner, David Linam
  • System and method for per-bit de-skew for datamask in a double data-rate memory device interface
    Patent number: 8902693
    Abstract: In a training mode, per-bit de-skew (PBDS) values for a datamask signal in a synchronous dynamic random access memory are iteratively adjusted in conjunction with writing test patterns to the memory and reading back test patterns from the memory until optimum datamask PBDS values are determined.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: December 2, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Barbara Jean Duffner