Patents by Inventor Snehasish ROYCHOWDHURY

Snehasish ROYCHOWDHURY 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).

  • F/2 spur estimation and correction
    Patent number: 11777513
    Abstract: A spur correction system for a transmit chain having an interleaving multiplexer. In some embodiments, the spur correction system includes a spur sense chain, a correction controller, and a Q path corrector. The interleaving multiplexer combines signals from multiple bands in response to a clock signal. The spur sense chain estimates an error that is in phase with the clock signal (an I-phase error) and an error that is a derivative of the clock signal (a Q-phase error). The correction controller compensates for the estimated I-phase error by injecting an I-phase correction signal into the transmit chain. The Q path corrector compensates for the estimated Q-phase error by selectively connecting one or more capacitors within the interleaving multiplexer.
    Type: Grant
    Filed: November 30, 2021
    Date of Patent: October 3, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Karthikeyan Gunasekaran, Snehasish Roychowdhury, Rakesh Manjunath, Aswath V S, Sthanunathan Ramakrishnan, Sarma Sudareswara Gunturi, Rahul Sharma, Jagannathan Venkataraman, Nagarajan Viswanathan
  • FDAC/2 SPUR ESTIMATION AND CORRECTION
    Publication number: 20220239304
    Abstract: A spur correction system for a transmit chain having an interleaving multiplexer. In some embodiments, the spur correction system includes a spur sense chain, a correction controller, and a Q path corrector. The interleaving multiplexer combines signals from multiple bands in response to a clock signal. The spur sense chain estimates an error that is in phase with the clock signal (an I-phase error) and an error that is a derivative of the clock signal (a Q-phase error). The correction controller compensates for the estimated I-phase error by injecting an I-phase correction signal into the transmit chain. The Q path corrector compensates for the estimated Q-phase error by selectively connecting one or more capacitors within the interleaving multiplexer.
    Type: Application
    Filed: November 30, 2021
    Publication date: July 28, 2022
    Inventors: Karthikeyan GUNASEKARAN, Snehasish ROYCHOWDHURY, Rakesh MANJUNATH, Aswath V S, Sthanunathan RAMAKRISHNAN, Sarma Sudareswara GUNTURI, Rahul SHARMA, Jagannathan VENKATARAMAN, Nagarajan VISWANATHAN