Patents by Inventor Narayan K

Narayan K 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 threshold adjustment using reference data
    Patent number: 10629247
    Abstract: Apparatuses, systems, and methods are disclosed for read threshold adjustment using reference data for non-volatile memory. An apparatus may include an array of non-volatile memory cells and a controller. A controller may be configured to write a predetermined reference data pattern to a region of an array. A controller may be configured to read reference data from a region. A controller may be configured to set one or more read thresholds based on identifying differences between reference data and a predetermined reference data pattern.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 21, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Salil Kale, Shreejith Kv, Aneesh Puthoor, Gopu S, Narayan K
  • Dynamic read table block filter
    Patent number: 10553301
    Abstract: Non-volatile memory and processes for reprogramming data posing a potential reliability concern are provided. A process is provided for distinguishing between cross-temperature effects and read disturb effects as part of determining whether to perform a maintenance operation such as reprogramming. A process is provided that compensates for cross-temperature effects while testing to determine whether to perform a maintenance operation. Applying temperature compensation attempts to remove cross-temperature effects so that testing accurately detects whether read disturb has occurred, without the effects of temperature. By reducing cross-temperature effects, maintenance operations can be more accurately scheduled for memory that has experienced read disturb, as opposed to cross-temperature effects.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: February 4, 2020
    Assignee: SanDisk Technologies LLC
    Inventors: Narayan K, Sateesh Desireddi, Aneesh Puthoor, Dharmaraju Marenahally Krishna, Arun Thandapani, Divya Prasad, Thendral Murugaiyan, Piyush Dhotre
  • READ THRESHOLD ADJUSTMENT USING REFERENCE DATA
    Publication number: 20190198069
    Abstract: Apparatuses, systems, and methods are disclosed for read threshold adjustment using reference data for non-volatile memory. An apparatus may include an array of non-volatile memory cells and a controller. A controller may be configured to write a predetermined reference data pattern to a region of an array. A controller may be configured to read reference data from a region. A controller may be configured to set one or more read thresholds based on identifying differences between reference data and a predetermined reference data pattern.
    Type: Application
    Filed: December 21, 2017
    Publication date: June 27, 2019
    Applicant: Western Digital Technologies, Inc.
    Inventors: SALIL KALE, SHREEJITH KV, ANEESH PUTHOOR, GOPU S, NARAYAN K
  • Dynamic Read Table Block Filter
    Publication number: 20180350446
    Abstract: Non-volatile memory and processes for reprogramming data posing a potential reliability concern are provided. A process is provided for distinguishing between cross-temperature effects and read disturb effects as part of determining whether to perform a maintenance operation such as reprogramming. A process is provided that compensates for cross-temperature effects while testing to determine whether to perform a maintenance operation. Applying temperature compensation attempts to remove cross-temperature effects so that testing accurately detects whether read disturb has occurred, without the effects of temperature. By reducing cross-temperature effects, maintenance operations can be more accurately scheduled for memory that has experienced read disturb, as opposed to cross-temperature effects.
    Type: Application
    Filed: August 15, 2017
    Publication date: December 6, 2018
    Applicant: SanDisk Technologies LLC
    Inventors: Narayan K, Sateesh Desireddi, Aneesh Puthoor, Dharmaraju Marenahally Krishna, Arun Thandapani, Divya Prasad, Thendral Murugaiyan, Piyush Dhotre