Patents Assigned to OC Applications Research LLC
  • SCAN STRING SEGMENTATION FOR DIGITAL TEST COMPRESSION
    Publication number: 20080244342
    Abstract: One may use a new technique to determine the placement of exclusive-ors in each scan string of a chip to achieve improved test vector compression, and one may combine this technique with methods to minimize the overhead of the exclusive-or logic, to eliminate clock enable logic for multiple scan strings, to minimize the changes to existing test logic insertion and scan string reordering, and to minimize the test vector compression computation time.
    Type: Application
    Filed: May 15, 2008
    Publication date: October 2, 2008
    Applicant: OC Applications Research LLC
    Inventor: LAURENCE H. COOKE
  • Hashing and serial decoding techniques
    Patent number: 7421563
    Abstract: A technique for generating a list of all N-bit unsigned binary numbers by starting with an initial number less than some power of 2, successively multiplying the number by that power of 2 and adding the largest non-negative number less than that power of 2 such that the new number is not a duplicate of any of those already generated, and using the resulting lists to generate efficient hashing and serial decoding hardware and software.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: September 2, 2008
    Assignee: OC Applications Research LLC
    Inventor: Laurence H. Cooke
  • Scan string segmentation for digital test compression
    Patent number: 7412636
    Abstract: One may use a new technique to determine the placement of exclusive-ors in each scan string of a chip may achieve improved test vector compression, and one may combine this technique with methods to minimize the overhead of the exclusive-or logic, to eliminate clock enable logic for multiple scan strings, to minimize the changes to existing test logic insertion and scan strings reordering, and to minimize the test vector compression computation time.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: August 12, 2008
    Assignee: OC Applications Research LLC
    Inventor: Laurence H. Cooke