Patents by Inventor Timothy N. Ayres

Timothy N. Ayres 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).

  • Launch-on-shift support for on-chip-clocking
    Patent number: 7882410
    Abstract: A method to perform launch-on-shift scanning for integrated circuits having multiple clock domains is presented. An integrated circuit includes both capture clock domains and non-capture clock domains. The portions of the test vectors for non-capture clock domains are shifted into the scan chains of the non-capture clock domains and allowed to settle prior to the last shift launch cycle and the capture cycle of the capture clock domains. Thus, the ambiguity of the timing between the non-capture domains and the capture domains caused by asynchronous clock signals is eliminated.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: February 1, 2011
    Assignee: Synopsys, Inc.
    Inventors: Timothy N. Ayres, Peter Wohl, John A. Waicukauski
  • Launch-On-Shift Support for On-Chip-Clocking
    Publication number: 20080320348
    Abstract: A method to perform launch-on-shift scanning for integrated circuits having multiple clock domains is presented. An integrated circuit includes both capture clock domains and non-capture clock domains. The portions of the test vectors for non-capture clock domains are shifted into the scan chains of the non-capture clock domains and allowed to settle prior to the last shift launch cycle and the capture cycle of the capture clock domains. Thus, the ambiguity of the timing between the non-capture domains and the capture domains caused by asynchronous clock signals is eliminated.
    Type: Application
    Filed: June 25, 2007
    Publication date: December 25, 2008
    Applicant: Synopsys, Inc.
    Inventors: Timothy N. Ayres, Peter Wohl, John A. Waicukauski