Patents by Inventor Ashwin S. MADHAVAKAIMAL

Ashwin S. MADHAVAKAIMAL 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).

  • Read eye training
    Patent number: 11909565
    Abstract: Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. In embodiment, a single-ended receiver trains DFE coefficients and the slicer reference voltage to improve the received eye height. The process for training avoids many whole range sweeps thereby shortening training time. A custom data pattern that includes low-frequency (DC with respect to DFE) and high-frequency (AC with respect to DFE) worst cases is used for training in a closed loop manner. Negative DFE is used to measure the AC height of the data. Positive DFE is used to find the DC height of the data pattern.
    Type: Grant
    Filed: August 2, 2022
    Date of Patent: February 20, 2024
    Assignee: Cadence Design Systems, Inc.
    Inventors: Anirudha Shelke, Ashwin S. Madhavakaimal, Kiran Baby
  • READ EYE TRAINING
    Publication number: 20230048896
    Abstract: Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. In embodiment, a single-ended receiver trains DFE coefficients and the slicer reference voltage to improve the received eye height. The process for training avoids many whole range sweeps thereby shortening training time. A custom data pattern that includes low-frequency (DC with respect to DFE) and high-frequency (AC with respect to DFE) worst cases is used for training in a closed loop manner. Negative DFE is used to measure the AC height of the data. Positive DFE is used to find the DC height of the data pattern.
    Type: Application
    Filed: August 2, 2022
    Publication date: February 16, 2023
    Inventors: Anirudha SHELKE, Ashwin S. MADHAVAKAIMAL, Kiran BABY