Patents by Inventor David Freitas

David Freitas 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).

  • Patent number: 11190199
    Abstract: Examples herein relate to electronic devices that include an asynchronous successive approximation register (SAR) analog-to-digital converter (ADC) that implements timing adjustment based on output statistics. In an example, an electronic device includes an asynchronous SAR ADC, a statistics monitor, and an operation setting circuit. The asynchronous SAR ADC is configured to output output data. The statistics monitor is configured to capture samples at a bit position of the output data. The statistics monitor is further configured to generate an operational setting based on the captured samples. The operation setting circuit is configured to adjust an operating condition of the asynchronous SAR ADC based on the operational setting.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: November 30, 2021
    Assignee: XILINX, INC.
    Inventors: Kevin Zheng, David Freitas, Hsung Jai Im
  • Patent number: 11163082
    Abstract: Methods, systems, devices, and products for performing well logging in a borehole intersecting an earth formation to obtain and transmit an acoustic reflection image of the formation. Methods include identifying a set of features in the acoustic reflection image substantially fitting a pattern, wherein the set of features corresponds to a portion of at least one reflecting structural interface of the formation; and using a representation of the pattern as the compressed representation of the acoustic reflection image. The features may be amplitude peaks in the acoustic reflection image, and the pattern may be a line segment therein that is obtained from the amplitude peaks. Identifying the set of features may include generating a binary image of the amplitude peaks.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: November 2, 2021
    Assignee: BAKER HUGHES HOLDINGS LLC
    Inventors: David Freitas, Theodorous Geerits, Anna Przebindowska, Alber Tabone Novo, Martin Tygel
  • Publication number: 20180031718
    Abstract: Methods, systems, devices, and products for performing well logging in a borehole intersecting an earth formation to obtain and transmit an acoustic reflection image of the formation. Methods include identifying a set of features in the acoustic reflection image substantially fitting a pattern, wherein the set of features corresponds to a portion of at least one reflecting structural interface of the formation; and using a representation of the pattern as the compressed representation of the acoustic reflection image. The features may be amplitude peaks in the acoustic reflection image, and the pattern may be a line segment therein that is obtained from the amplitude peaks. Identifying the set of features may include generating a binary image of the amplitude peaks.
    Type: Application
    Filed: August 1, 2016
    Publication date: February 1, 2018
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: DAVID FREITAS, THEODOROUS GEERITS, ANNA PRZEBINDOWSKA, ALBER TABONE NOVO, MARTIN TYGEL
  • Publication number: 20080012642
    Abstract: A circuit device and method for designing a serial link receiver, which accommodates a wide input voltage range and provides tolerance to high termination voltages. The receiver is designed with a pair of RC networks connected inline between the input and the preamplifier and a common mode feedback loop, which monitors shifts in the common mode voltage and adjusts the inputs provided to the preamplifier. The circuit device maintains a flat bandwidth to accommodate all signaling rates.
    Type: Application
    Filed: May 4, 2006
    Publication date: January 17, 2008
    Inventors: Hayden Cranford, Westerfield Ficken, David Freitas, Joseph Stevens