Patents by Inventor Jean-Jaques Quisquater

Jean-Jaques Quisquater 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: 5889622
    Abstract: The arithmetic unit in a data processing system with a microprocessor and an additional arithmetic unit carries out special arithmetic operations, preferably integrated in a single semiconductor chip, is controlled by the microprocessor via a number of registers. Several sets of such registers are provided. The registers of one set are selected via a selection circuit. As a result, a set of registers which is not required during execution of a calculation by the arithmetic unit can be filled with new data by the microprocessor and, after completion of the calculation in the arithmetic unit, switching over to a newly filled set of registers takes place so that the arithmetic unit can continue with a new set of operands without having to observe a waiting period.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: March 30, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Thomas Wille, Ralf Malzahn, Jean-Jaques Quisquater, Ronald Ferreira