Patents by Inventor Charles Collis

Charles Collis 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).

  • Antimetastable state circuit
    Patent number: 5020038
    Abstract: An antimetastable state circuit which detects when a data edge is so close to a clock edge that it would result in a metastable state in a time measurement circuit is provided. When a potential metastable state is detected, the antimetastable circuit delays the data edge with respect to the clock edge by a known amount so as to avoid the metastable state. The delayed edge is used to start the time measurement circuit, and the next clock edge is used to stop the time measurement circuit. When the known delay has been added, it is subtracted from the measured time, to produce an accurate measurement of the elapsed time between the rise of the data edge and the rise of the clock edge.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: May 28, 1991
    Assignee: Motorola, Inc.
    Inventors: Mavin Swapp, Charles Collis