Patents by Inventor Henry Farmer

Henry Farmer 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).

  • CLOCK CONTROL CIRCUIT FOR TEST THAT FACILITATES AN AT SPEED STRUCTURAL TEST
    Publication number: 20060248417
    Abstract: A clock selection circuit selectively passes one or more clocks into portions of an integrated circuit for testing. In one mode, the selection circuit passes a functional clock into a section of logic for an at speed test under test program control. In another mode, the selection circuit passes a clock other than the functional clock, such at a reduced frequency, in a test mode.
    Type: Application
    Filed: April 28, 2005
    Publication date: November 2, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Henry Farmer, Gary Grise, David Milton, Steven Oakland, Mark Taylor
  • CLOCK CONTROL CIRCUIT FOR TEST THAT FACILITATES AN AT SPEED STRUCTURAL TEST
    Publication number: 20060190781
    Abstract: When testing an ASIC using functional clocks, a control circuit at the clock root incorporates additional test logic in the root and a deskewer for clock control, giving rise to a very flexible control that can pass clock signals at a number of clock rates and can pass only a single clock edge, thereby permitting the passage of the required number of clock pulses for a test. The system uses the functional clock and the clock distribution tree designed into the ASIC.
    Type: Application
    Filed: February 18, 2005
    Publication date: August 24, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Henry Farmer, Gary Grise, David Milton, Mark Taylor