Patents by Inventor Thomas Nulsen

Thomas Nulsen 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 based voltage deviation detector
    Patent number: 7414438
    Abstract: The clock based voltage deviation detector of the present invention includes a pulse module, an indicator module and a correlation module. The pulse module generates a stream of reset pulses as a function of a clock signal. The indicator module generates a pass/fail indicator signal as a function of the reset pulse stream and a difference between an input signal and a reference voltage. The correlation module correlates an event (e.g., overvoltage or undervoltage) of the pass/fail indicator signal with a period of the clock signal at which the event occurred.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: August 19, 2008
    Assignee: Credence Systems Corporation
    Inventors: Thomas Nulsen, Jose Rosado, Robert Glenn