Patents by Inventor Justin D. Butterfield

Justin D. Butterfield 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).

  • Output driver for multi-level signaling
    Patent number: 10573358
    Abstract: A driver of a multi-level signaling interface is provided. The driver may be configured reduce noise in a multi-level signal (e.g., a pulse amplitude modulation signal) generated by the driver using switching components of different polarities. The driver may include a pull-up circuit and/or a pull-down circuit. The pull-up circuit and the pull-down circuit may include at least one switching component of a first polarity (e.g., nmos transistor) and at least one switching component of a second polarity different from the first polarity (e.g., pmos transistor). Such a configuration of pull-up and pull down circuits may generate a more linear relationship between an output current and an output voltage of an output of the driver, thereby improving one or more characteristics of the multi-level signal.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: February 25, 2020
    Assignee: Micron Technology, Inc.
    Inventor: Justin D. Butterfield
  • OUTPUT DRIVER FOR MULTI-LEVEL SIGNALING
    Publication number: 20200013442
    Abstract: A driver of a multi-level signaling interface is provided. The driver may be configured reduce noise in a multi-level signal (e.g., a pulse amplitude modulation signal) generated by the driver using switching components of different polarities. The driver may include a pull-up circuit and/or a pull-down circuit. The pull-up circuit and the pull-down circuit may include at least one switching component of a first polarity (e.g., nmos transistor) and at least one switching component of a second polarity different from the first polarity (e.g., pmos transistor). Such a configuration of pull-up and pull down circuits may generate a more linear relationship between an output current and an output voltage of an output of the driver, thereby improving one or more characteristics of the multi-level signal.
    Type: Application
    Filed: July 17, 2019
    Publication date: January 9, 2020
    Inventor: Justin D. Butterfield
  • Output driver for multi-level signaling
    Patent number: 10403337
    Abstract: A driver of a multi-level signaling interface is provided. The driver may be configured reduce noise in a multi-level signal (e.g., a pulse amplitude modulation signal) generated by the driver using switching components of different polarities. The driver may include a pull-up circuit and/or a pull-down circuit. The pull-up circuit and the pull-down circuit may include at least one switching component of a first polarity (e.g., nmos transistor) and at least one switching component of a second polarity different from the first polarity (e.g., pmos transistor). Such a configuration of pull-up and pull down circuits may generate a more linear relationship between an output current and an output voltage of an output of the driver, thereby improving one or more characteristics of the multi-level signal.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: September 3, 2019
    Assignee: Micron Technology, Inc.
    Inventor: Justin D. Butterfield
  • OUTPUT DRIVER FOR MULTI-LEVEL SIGNALING
    Publication number: 20190043543
    Abstract: A driver of a multi-level signaling interface is provided. The driver may be configured reduce noise in a multi-level signal (e.g., a pulse amplitude modulation signal) generated by the driver using switching components of different polarities. The driver may include a pull-up circuit and/or a pull-down circuit. The pull-up circuit and the pull-down circuit may include at least one switching component of a first polarity (e.g., nmos transistor) and at least one switching component of a second polarity different from the first polarity (e.g., pmos transistor). Such a configuration of pull-up and pull down circuits may generate a more linear relationship between an output current and an output voltage of an output of the driver, thereby improving one or more characteristics of the multi-level signal.
    Type: Application
    Filed: January 11, 2018
    Publication date: February 7, 2019
    Inventor: Justin D. Butterfield