Patents by Inventor Donald H. Lenhert

Donald H. Lenhert 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).

  • Method and apparatus for generating pseudorandom numbers or for performing data compression in a data processor
    Patent number: 5416783
    Abstract: A method and apparatus for generating pseudo-random numbers or for performing data compression in a data processor (12). In one form, the present invention generates pseudo-random numbers which are used to provide scan input data bits during built-in-self-test (BIST) scan testing. The present invention then performs data compression on the scan output data received back from the circuits under test (73-75). In one embodiment, the BIST scan testing of data processor (12) is performed in a special "background self-test mode". Central processing unit (CPU) 20 is used to generate the pseudo-random numbers and to perform the data compression. CPU 20 also functions as a standard CPU when in a normal operating mode.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: May 16, 1995
    Assignee: Motorola, Inc.
    Inventors: James L. Broseghini, James G. Viot, Donald H. Lenhert