Patents by Inventor Bommana S. Rao

Bommana S. Rao 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).

  • Input/output path testing and characterization using scan chains
    Patent number: 10067189
    Abstract: Disclosed circuitry includes input-output pads, receive flip-flops, and transmit flip-flops coupled to the input-output pads. Data path control circuitry is coupled to data path control flip-flops, the receive flip-flops and the transmit flip-flops. The data path control circuitry is configured to selectably couple the receive flip-flops and the transmit flip-flops to the input-output pads in response to states of the data path control flip-flops. Clock control circuitry is coupled to clock control flip-flops, the receive flip-flops and the transmit flip-flops. The clock control circuitry is configured to selectably apply one of multiple clock signals to the receive flip-flops and the transmit flip-flops in response to states of the clock control flip-flops. A first scan chain is coupled to the clock control flip-flops and the data path control flip-flops. A second scan chain is coupled to the receive flip-flops and the transmit flip-flops.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: September 4, 2018
    Assignee: XILINX, INC.
    Inventors: Banadappa V. Shivaray, Ahmad R. Ansari, Sanjeeva R. Duggampudi, Pramod Surathkal, Ushasri Merugu, Bommana S. Rao, Sowmya Sheela Thati, Shashidhar S. Krishnamurthy