Patents by Inventor Subramani Shankar

Subramani Shankar 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 introducing differential delay between virtually concatenated tributaries
    Patent number: 7324562
    Abstract: In one embodiment, the invention is an apparatus for testing differential delay correction of network elements using virtual concatenation. The apparatus includes a first PRBS (pseudo-random bit stream) generator dedicated to a first tributary. The apparatus also includes an interface between the first PRBS generator and a tester. The apparatus further includes an interface between the first PRBS generator and a device under test. The apparatus may further include a second PRBS dedicated to a second tributary. The apparatus may also include a control logic block to control the first PRBS generator and the second PRBS generator, and coupled to the first PRBS generator and the second PRBS generator.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: January 29, 2008
    Assignee: Cypress Semiconductor Corporation
    Inventors: Subramani Shankar, Velamur Krishnamachari Vasudevan, Ponnusamy Kanagaralu, Hariprasad Gangadharan