Patents by Inventor Donald J. DaCosta

Donald J. DaCosta 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: 5220211
    Abstract: A high-speed data transport system for use in computers, switches, microprocessors or the like includes a low impedance differential bus and a plurality of transceivers connected to the bus. Each of the transceivers is provided with a driver circuit which places data onto the bus and a receiver for accepting data from the bus. The driver includes a pseudo-differential current driving circuit arrangement which sinks current from only one side of the bus while the other side of the differential bus is undisturbed. The receiver includes a differential comparator biased to a preferred output voltage level.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: June 15, 1993
    Assignee: International Business Machines Corporation
    Inventors: Robert J. Christopher, Donald J. DaCosta, Joseph C. Diepenbrock, Phillip R. Epley