Patents by Inventor James K. Tam

James K. Tam 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: 6276844
    Abstract: A data processing system including an improved method and apparatus for the arrangement and interconnection between electronic devices to improve system cycle time. The apparatus possesses a) a plurality of: memory SIMMs, memory devices on the noted memory SIMMs and registers; b) a clock; c) means for connecting signals between the memory devices on the memory SIMMs and the registers; and d) means for connecting signals between the memory devices on the memory SIMMs and the clocks.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: August 21, 2001
    Assignee: International Business Machines Corporation
    Inventors: Paul William Coteus, Ralph Herman Genz, Alphonso P. Lanzetta, Warren Edward Maule, Daniel Julius Phipps, James K. Tam, James Donald Wagoner
  • Patent number: 5502392
    Abstract: A method for completely characterizing coupled transmission lines by short-pulse propagation is described. The complex frequency-dependent propagation matrix, impedance matrix and admittance matrix for a set of n parallel transmission lines can be determined by comparing the properties of two sets of coupled transmission lines of different length. Each transmission line set has two conductors of unequal length and ground conductors to form a coupled transmission line system. Each transmission line set can have uncoupled ends. An input pulse is provided at at least one node of each transmission line set. The complex frequency dependent propagation matrix of each transmission line set is determined by a comparison of the output pulses at the remaining nodes of each transmission line set which involves ratioing to cancel out the effect of the pad-to-probe discontinuity and the uncoupled ends which make it unnecessary to do any embedding.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: March 26, 1996
    Assignee: International Business Machines Corporation
    Inventors: Gnanalingam Arjavalingam, Alina Deutsch, Gerard V. Kopcsay, James K. Tam