Patents by Inventor John G. RELL, III

John G. RELL, 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).

  • Built-in self-test for receiver channel
    Patent number: 10608763
    Abstract: Method and apparatus for packeted analysis, comprising: testing a phase rotator at a plurality of phase rotator positions, by propagating a first series of bits of a first pattern through a channel of an integrated circuit; propagating a second series of bits of a second pattern through the channel; measuring, for the given phase rotator position, a value of each bit propagated through the channel; and in response to determining that measured values of the bits propagated through the channel conform to one of the first pattern and the second pattern, indicating that the given phase rotator position satisfies an accuracy threshold; determining a sequence of phase rotator positions of the plurality of phase rotator positions in which the accuracy threshold is satisfied; and in response to determining that the sequence of phase rotator positions does not satisfy an eye width threshold, failing the channel of the integrated circuit.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: March 31, 2020
    Assignee: International Business Machines Corporation
    Inventors: John G. Rell, III, Michael W. Harper, Mack W. Riley, Michael B. Spear
  • BUILT-IN SELF-TEST FOR RECEIVER CHANNEL
    Publication number: 20190363813
    Abstract: Method and apparatus for packeted analysis, comprising: testing a phase rotator at a plurality of phase rotator positions, by propagating a first series of bits of a first pattern through a channel of an integrated circuit; propagating a second series of bits of a second pattern through the channel; measuring, for the given phase rotator position, a value of each bit propagated through the channel; and in response to determining that measured values of the bits propagated through the channel conform to one of the first pattern and the second pattern, indicating that the given phase rotator position satisfies an accuracy threshold; determining a sequence of phase rotator positions of the plurality of phase rotator positions in which the accuracy threshold is satisfied; and in response to determining that the sequence of phase rotator positions does not satisfy an eye width threshold, failing the channel of the integrated circuit.
    Type: Application
    Filed: May 24, 2018
    Publication date: November 28, 2019
    Inventors: John G. RELL, III, Michael W. HARPER, Mack W. RILEY, Michael B. SPEAR