Patents by Inventor Campbell H. Snyder

Campbell H. Snyder 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: 5619158
    Abstract: A clocking system for complex electronic devices is created in an hierarchial manner whereby the master clock pulse is provided to a plurality of digital pulse aligners which in turn provide phase aligned clock signals at the field replaceable unit level to either a slave clock or a digital phase aligner. The slave clock or the digital phase aligner at the field replaceable unit level in turn provides an aligned clock pulse to a timing node on respective chips. A third level of the hierarchy provides similarly aligned pulses to individual using-circuits on the chips of the system. The digital phase aligner, aligning the output pulse at the timing node of the next level with the reference pulses being provided to the digital phase aligner at each level, insures that the timing pulses arriving at the utilizing circuits are synchronously aligned with clock pulses of the master clock.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: April 8, 1997
    Assignee: International Business Machines Corp.
    Inventors: Humberto F. Casal, Joel R. Davidson, Hehching H. Li, Yuan C. Lo, Trong D. Nguyen, Campbell H. Snyder, Nandor G. Thoma
  • Patent number: 4978638
    Abstract: Described is an improvement for thermal enhancement technology for high power dissipating plastic packaged electronic circuit chips derived from providing structural features in the plastic package adapted to snap fit with complementarily formed edges of heat sink members.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: December 18, 1990
    Assignee: International Business Machines Corporation
    Inventors: Marvin L. Buller, Barbara J. McNelis, Campbell H. Snyder