Patents by Inventor Darlene Viviani

Darlene Viviani 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: 9947400
    Abstract: A method for improving the stability of a resistive change cell is disclosed. The stability of a resistive change memory cell—that is, the tendency of the resistive change memory cell to retain its programmed resistive state—may, in certain applications, be compromised if the cell is programmed into an unstable or metastable state. In such applications, a programming method using bursts of sub-pulses within a pulse train is used to drive the resistive change cell material into a stable state during the programming operation, reducing resistance drift over time within the cell.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: April 17, 2018
    Inventor: Darlene Viviani
  • Publication number: 20170309334
    Abstract: A method for improving the stability of a resistive change cell is disclosed. The stability of a resistive change memory cell-that is, the tendency of the resistive change memory cell to retain its programmed resistive state-may, in certain applications, be compromised if the cell is programmed into an unstable or metastable state. In such applications, a programming method using bursts of sub-pulses within a pulse train is used to drive the resistive change cell material into a stable state during the programming operation, reducing resistance drift over time within the cell.
    Type: Application
    Filed: April 22, 2016
    Publication date: October 26, 2017
    Applicant: Nantero Inc.
    Inventor: Darlene VIVIANI
  • Patent number: 9666272
    Abstract: Methods for dynamically programming and dynamically reading one or more resistive change elements within a resistive change element array are disclosed. These methods include first pre-charging all of the array lines within a resistive change element array simultaneously and then grounding certain array lines while allowing other array lines to float in order to direct discharge currents through only selected cells. In this way, resistive change elements within resistive change element arrays made up of 1-R cells—that is, cells without in situ selection circuitry—can be reliably and rapidly accessed and programmed.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: May 30, 2017
    Assignee: Nantero Inc.
    Inventor: Darlene Viviani
  • Publication number: 20160125941
    Abstract: Methods for dynamically programming and dynamically reading one or more resistive change elements within a resistive change element array are disclosed. These methods include first pre-charging all of the array lines within a resistive change element array simultaneously and then grounding certain array lines while allowing other array lines to float in order to direct discharge currents through only selected cells. In this way, resistive change elements within resistive change element arrays made up of 1-R cells—that is, cells without in situ selection circuitry—can be reliably and rapidly accessed and programmed.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Inventor: Darlene Viviani
  • Publication number: 20160049193
    Abstract: Methods for dynamically programming and dynamically reading one or more resistive change elements within a resistive change element array are disclosed. These methods include first pre-charging all of the array lines within a resistive change element array simultaneously and then grounding certain array lines while allowing other array lines to float in order to direct discharge currents through only selected cells. In this way, resistive change elements within resistive change element arrays made up of 1-R cells—that is, cells without in situ selection circuitry—can be reliably and rapidly accessed and programmed.
    Type: Application
    Filed: August 12, 2014
    Publication date: February 18, 2016
    Inventor: Darlene Viviani
  • Patent number: 9263126
    Abstract: Methods for dynamically programming and dynamically reading one or more resistive change elements within a resistive change element array are disclosed. These methods include first pre-charging all of the array lines within a resistive change element array simultaneously and then grounding certain array lines while allowing other array lines to float in order to direct discharge currents through only selected cells. In this way, resistive change elements within resistive change element arrays made up of 1-R cells—that is, cells without in situ selection circuitry—can be reliably and rapidly accessed and programed.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: February 16, 2016
    Assignee: Nantero Inc.
    Inventor: Darlene Viviani