Patents by Inventor Gregg R. Castellucei

Gregg R. Castellucei 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).

  • Transition detector with timer
    Patent number: 5907250
    Abstract: A circuit for detecting delay of more than a set period of time from a last signal transition for any of a plurality of data signals, comprising a differential comparator, and integrator pairs for each signal, one integrator of the pair being triggered by transition of the signal from low to high and the other triggered by transition of the inverse of the signal from low to high, each integrator having a voltage measured by the differential comparator against a reference voltage, each integrator being reset by the trigger for the other integrator.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: May 25, 1999
    Assignee: International Business Machines Corporation
    Inventors: Arnold E. Baizley, Gregg R. Castellucei, Steven J. Tanghe