Patents by Inventor Timothy S. Fiedler

Timothy S. Fiedler 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).

  • LSSD-testable D-type edge-trigger-operable latch with overriding set/reset asynchronous control
    Patent number: 4580137
    Abstract: A LSSD testable latch circuit apparatus is disclosed which has systems operational and LSSD testing operational modes. The apparatus is arranged with first and second groups of flip-flops, each group having three flip-flops. Control means allows for selective operation of the first group of flop-flops as a D-type edge triggered latch during the systems operational mode and of the first and second groups as a three-stage shift register during the LSSD testing operational mode. The control means also allows the D-type edge-triggered latch to have override asynchronously set and/or reset control.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: April 1, 1986
    Assignee: International Business Machines Corporation
    Inventors: Timothy S. Fiedler, Richard P. Moore