Patents by Inventor Ivor Catt

Ivor Catt 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: 5055774
    Abstract: Each component circuit of an LSI wafer includes a kernel logic section that checks the integrity of the circuit to which it belongs according to a step-by-step process by which progressively larger portions of the circuit are tested. Logic tested during one step is involved in the next step, and once testing of the component circuit is completed, it is extended to testing adjacent circuits of the wafer. Detection of a fault at any stage results in isolation of the faulty circuit or part of it. Test programs and data are stored in ROM within the component circuit, or are supplied via wires bonded to the wafer, for storage in RAM. On completion of the testing, configuration logic within the circuits interconnects the good circuits in an array for communication of signals between them. The kernel logic may be shared between groups of component circuits.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: October 8, 1991
    Inventor: Ivor Catt
  • Patent number: 4333161
    Abstract: A serial recirculating store is provided with data processing units distributed along its length and a fast data line interacts with the serial store at each processing unit for controlling processing operations. The store is divided into segments with selectively operable bypass lines. A processing unit can operate on information passing therethrough from the associated segment and from the succeeding segment via the bypass line. Autonomous data processing routines can be effected in recirculating portions of the store as data thereon repeatedly leapfrogs other data utilizing the bypass lines.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: June 1, 1982
    Inventor: Ivor Catt