Patents by Inventor David L. Guertin

David L. Guertin 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).

  • VLSI performance compensation for off-chip drivers and clock generation
    Patent number: 4939389
    Abstract: A performance-sensing element (PSE) circuit detects the actual speed of other circuits on the same chip by launching a pulse into a tapped cascade of circuits on the chip, then detecting how far the pulse has progressed after a known interval. Control signals indicating circuit speed can stabilize parameters of the other circuits, such as rate of change of current (di/dt) in driver circuits, absolute delay of clock signals from one chip to another, and relative delay of multiple clock signals within the chip.
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: July 3, 1990
    Assignee: International Business Machines Corporation
    Inventors: Dennis T. Cox, David L. Guertin, Charles L. Johnson, Bruce G. Rudolph, Mark E. Turner, Robert R. Williams