Patents by Inventor Siva Charan Nimmagadda

Siva Charan Nimmagadda 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).

  • Calibrated linear duty cycle correction
    Patent number: 11750185
    Abstract: Examples describe a duty cycle correction circuit for correcting duty cycle distortion from memory. One example is an integrated circuit for correcting an input clock signal. The integrated circuit includes a first leg circuit and a second leg circuit. The first leg circuit and the second leg circuit both comprise a charging circuit and a discharging circuit. Each charging circuit comprises a first plurality of transistors and each discharging circuit comprises a second plurality of transistors. The charging circuit is coupled to the discharging circuit in series. A number of transistors of the first plurality of transistors in the first leg circuit is different from a number of transistors of the first plurality of transistors in the second leg circuit.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: September 5, 2023
    Assignee: XILINX, INC.
    Inventors: Siva Charan Nimmagadda, Xiaobao Wang, Vinit Shah, Sabarathnam Ekambaram, Hari Bilash Dubey
  • CALIBRATED LINEAR DUTY CYCLE CORRECTION
    Publication number: 20230086781
    Abstract: Examples describe a duty cycle correction circuit for correcting duty cycle distortion from memory. One example is an integrated circuit for correcting an input clock signal. The integrated circuit includes a first leg circuit and a second leg circuit. The first leg circuit and the second leg circuit both comprise a charging circuit and a discharging circuit. Each charging circuit comprises a first plurality of transistors and each discharging circuit comprises a second plurality of transistors. The charging circuit is coupled to the discharging circuit in series. A number of transistors of the first plurality of transistors in the first leg circuit is different from a number of transistors of the first plurality of transistors in the second leg circuit.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 23, 2023
    Inventors: Siva Charan NIMMAGADDA, Xiaobao WANG, Vinit SHAH, Sabarathnam EKAMBARAM, Hari Bilash DUBEY
  • Time-to-digital conversion
    Patent number: 8884804
    Abstract: An apparatus relating generally to time-to-digital conversion is disclosed. In this apparatus, a time-to-digital converter is coupled to a period sensor. The period sensor includes a pulse generator to generate a pulse. An integrator of the period sensor is coupled to receive the pulse to generate an analog voltage signal responsive to the pulse. The time-to-digital converter includes an analog-to-digital converter coupled to provide a digital signal associated with the analog voltage signal.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: November 11, 2014
    Assignee: Xilinx, Inc.
    Inventors: Amitava Majumdar, Siva Charan Nimmagadda, Baanurathan Sadasivam, Richard W. Swanson, Yohan Frans