Patents by Inventor Joshua M. Bamford

Joshua M. Bamford 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).

  • Resistive DAC with summing junction switches, current output reference, and output routing methods
    Patent number: 10855299
    Abstract: Described herein are DACs with low distortion for high dynamic range (HDR), extremely high dynamic range (EHDR), and other suitable applications. Some embodiments relate to a device including a DAC configured for coupling to an amplifier via a force path and a sense path. For example, the DAC may provide output current to the amplifier via the force path, and the DAC may sense the input voltage of the amplifier via the sense path. Accordingly, distortion such as harmonic distortion and/or gain offset from parasitic impedances in the force and/or sense paths may be reduced or eliminated. Some embodiments relate to a DAC including a voltage reference generator configured to compensate for variations in impedances of the DAC, such as due to semiconductor process variation. Accordingly, distortion in the DAC output due to variations in the DAC impedances may be reduced or eliminated.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: December 1, 2020
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: Ayman Shabra, Michael A Ashburn, Jr., Patrick Cooney, Adalberto Cantoni, Joshua M. Bamford
  • RESISTIVE DAC WITH SUMMING JUNCTION SWITCHES, CURRENT OUTPUT REFERENCE, AND OUTPUT ROUTING METHODS
    Publication number: 20200112317
    Abstract: Described herein are DACs with low distortion for high dynamic range (HDR), extremely high dynamic range (EHDR), and other suitable applications. Some embodiments relate to a device including a DAC configured for coupling to an amplifier via a force path and a sense path. For example, the DAC may provide output current to the amplifier via the force path, and the DAC may sense the input voltage of the amplifier via the sense path. Accordingly, distortion such as harmonic distortion and/or gain offset from parasitic impedances in the force and/or sense paths may be reduced or eliminated. Some embodiments relate to a DAC including a voltage reference generator configured to compensate for variations in impedances of the DAC, such as due to semiconductor process variation. Accordingly, distortion in the DAC output due to variations in the DAC impedances may be reduced or eliminated.
    Type: Application
    Filed: August 29, 2019
    Publication date: April 9, 2020
    Applicant: MEDIATEK Singapore Pte. Ltd.
    Inventors: Ayman Shabra, Michael A. Ashburn, JR., Patrick Cooney, Adalberto Cantoni, Joshua M. Bamford