Patents by Inventor Lawrence Norman Herr

Lawrence Norman Herr 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 testing a static RAM
    Patent number: 5687178
    Abstract: A method and apparatus for testing a static RAM includes a word line voltage control circuit (42) and an array supply voltage control circuit (46). In response to receiving a first control signal from a tester, the word line voltage control circuit (42) is used to provide a word line voltage to each word line of the memory array (31). The array supply voltage control circuit (46) provides a supply voltage to the array (31) in response to receiving a second control signal from the tester. During testing of memory 30, the array supply voltage and the word line voltage are supplied independently of the memory power supply voltage V.sub.DD in order to quickly detect memory cells that are defective due to soft defects.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: November 11, 1997
    Assignee: Motorola, Inc.
    Inventors: Lawrence Norman Herr, John David Porter, Mary Ann Coones