Patents by Inventor Nitin B. Gupta

Nitin B. Gupta 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).

  • Tester calibration verification device
    Patent number: 5256964
    Abstract: A circuit for verifying the accuracy a tester, for enhancing its calibration and for providing tracking between testers. The circuit includes a delay element, first and second multiplexers connected to the input and output of the delay element, respectively, and a feedback path linking outputs of the second multiplexer to inputs of the first multiplexer to provide an oscillation. The delay between an input of the first multiplexer to an output of the second multiplexer is measured and this delay is compared to the frequency domain measurement of the same to provide an indication of the accuracy of the tester.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: October 26, 1993
    Assignee: International Business Machines Corporation
    Inventors: Imtiaz K. Ahmed, Nitin B. Gupta