Patents by Inventor Richard David Barndt

Richard David Barndt 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: 11488673
    Abstract: After a predetermined period of time in a life cycle of a flash memory device, a plurality of reliability values corresponding to a plurality of reads of one or more of the plurality of memory cells are generated; each of the reads using a variation of a predetermined read level voltage. An offset voltage is then identified, offset from the read level voltage. The offset voltage corresponds to a zero crossing point in the range of the reliability values. Once the offset voltage is identified, the read level voltage is set to a calibrated voltage based on the offset voltage.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: November 1, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Seyhan Karakulak, Anthony Dwayne Weathers, Richard David Barndt
  • Publication number: 20220283950
    Abstract: Storage device programming methods, systems and devices are described. A method may generate a mapping of data based on a set of data, the mapping of data including a first mapped data and a second mapped data. The method may include performing a first programming operation to write, in a first mode, the first mapped data to the memory device. The method may include storing the second mapped data to a cache. The method may include generating a second set of data, based on an inverse mapping of the mapping of data including the second mapped data from the cache and the first mapped data from the memory device, for writing, in a second mode, to the memory device, wherein the second set of data includes the set of data, and the first mode and the second mode correspond to different modes of writing to the memory device.
    Type: Application
    Filed: May 17, 2022
    Publication date: September 8, 2022
    Applicant: Western Digital Technologies, Inc.
    Inventors: Bernie RUB, Mostafa EL GAMAL, Niranjay RAVINDRAN, Richard David BARNDT, Henry CHIN, Ravi J. KUMAR, James FITZPATRICK
  • Publication number: 20220214941
    Abstract: The subject technology provides for scanning blocks of a flash memory device for erased pages. A first codeword read from a page of a block in a flash memory device is received and provided to a first decoder for decoding. In response to receiving a first success indicator from the first decoder indicating that the first codeword was successfully decoded, first decoded data is provided from the first decoder to a second decoder for verification of the first decoded data. In response to receiving a first failure indicator from the second decoder indicating that the first decoded data was not verified, the page of the block is identified as being in an erased state based on the first success indicator received from the first decoder and the first failure indicator received from the second decoder.
    Type: Application
    Filed: March 25, 2022
    Publication date: July 7, 2022
    Applicant: Western Digital Technologies, Inc.
    Inventors: Richard David BARNDT, Seyhan KARAKULAK, Scott KAYSER, Majid NEMATI ANARAKI, Anthony Dwayne WEATHERS
  • Patent number: 11372765
    Abstract: Storage device programming methods, systems and devices are described. A method may generate a mapping of data based on a set of data, the mapping of data including a first mapped data and a second mapped data. The method may include performing a first programming operation to write, in a first mode, the first mapped data to the memory device. The method may include storing the second mapped data to a cache. The method may include generating a second set of data, based on an inverse mapping of the mapping of data including the second mapped data from the cache and the first mapped data from the memory device, for writing, in a second mode, to the memory device, wherein the second set of data includes the set of data, and the first mode and the second mode correspond to different modes of writing to the memory device.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: June 28, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Bernie Rub, Mostafa El Gamal, Niranjay Ravindran, Richard David Barndt, Henry Chin, Ravi J. Kumar, James Fitzpatrick
  • Patent number: 11327837
    Abstract: The subject technology provides for scanning blocks of a flash memory device for erased pages. A first codeword read from a page of a block in a flash memory device is received and provided to a first decoder for decoding. In response to receiving a first success indicator from the first decoder indicating that the first codeword was successfully decoded, first decoded data is provided from the first decoder to a second decoder for verification of the first decoded data. In response to receiving a first failure indicator from the second decoder indicating that the first decoded data was not verified, the page of the block is identified as being in an erased state based on the first success indicator received from the first decoder and the first failure indicator received from the second decoder.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: May 10, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Richard David Barndt, Seyhan Karakulak, Scott Kayser, Majid Nemati Anaraki, Anthony Dwayne Weathers
  • Publication number: 20210319837
    Abstract: Systems and methods for read level tracking and optimization are described. Pages from a wordline of a flash memory device read and the raw page data read from the wordline may be buffered in a first set of buffers. The raw page data for each of the pages may be provided to a decoder for decoding and the decoded page data for each of the pages buffered in a second set of buffers. First bin identifiers may be identified for memory cells of the wordline based on the raw page data and second bin identifiers may be identified for the memory cells of the wordline based on the decoded page data. Cell-level statistics may be accumulated based on the first bin identifiers and the second bin identifiers, and a gradient may be determined for respective read levels based on decoding results for each of the pages and the cell-level statistics. Settings for the read levels may be configured in the flash memory device based on the determined gradients.
    Type: Application
    Filed: June 25, 2021
    Publication date: October 14, 2021
    Inventors: Richard David BARNDT, Aldo Giovanni COMETTI, Richard Leo GALBRAITH, Jonas Andrew GOODE, Niranjay RAVINDRAN, Anthony Dwayne WEATHERS
  • Publication number: 20210319828
    Abstract: Storage device programming methods, systems and media are described. A method may include encoding data to generate an encoded set of data. A first programming operation may write the encoded set of data to a memory device. The method includes encoding, using a second encoding operation based on the data, to generate a second set of encoded data. The second set of encoded data is stored to a cache. A first decoding operation is performed, based on the second set of encoded data and the encoded set of data, to generate a decoded set of data. A second decoding operation is performed to generate a second decoded set of data. The second decoded set of data is encoded to generate a third set of encoded data. The method includes performing a second programming operation to write the third set of encoded data to the memory device.
    Type: Application
    Filed: June 23, 2021
    Publication date: October 14, 2021
    Inventors: Richard David Barndt, Bernardo Rub, Mostafa El Gamal
  • Patent number: 11101006
    Abstract: Systems and methods for read level tracking and optimization are described. Pages from a wordline of a flash memory device read and the raw page data read from the wordline may be buffered in a first set of buffers. The raw page data for each of the pages may be provided to a decoder for decoding and the decoded page data for each of the pages buffered in a second set of buffers. First bin identifiers may be identified for memory cells of the wordline based on the raw page data and second bin identifiers may be identified for the memory cells of the wordline based on the decoded page data. Cell-level statistics may be accumulated based on the first bin identifiers and the second bin identifiers, and a gradient may be determined for respective read levels based on decoding results for each of the pages and the cell-level statistics. Settings for the read levels may be configured in the flash memory device based on the determined gradients.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: August 24, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Richard David Barndt, Aldo Giovanni Cometti, Richard Leo Galbraith, Jonas Andrew Goode, Niranjay Ravindran, Anthony Dwayne Weathers
  • Patent number: 11087836
    Abstract: Storage device programming methods, systems and media are described. A method may include encoding data to generate an encoded set of data. A first programming operation may write the encoded set of data to a memory device. The method includes encoding, using a second encoding operation based on the data, to generate a second set of encoded data. The second set of encoded data is stored to a cache. A first decoding operation is performed, based on the second set of encoded data and the encoded set of data, to generate a decoded set of data. A second decoding operation is performed to generate a second decoded set of data. The second decoded set of data is encoded to generate a third set of encoded data. The method includes performing a second programming operation to write the third set of encoded data to the memory device.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: August 10, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Richard David Barndt, Bernardo Rub, Mostafa El Gamal
  • Publication number: 20210103496
    Abstract: The subject technology provides for scanning blocks of a flash memory device for erased pages. A first codeword read from a page of a block in a flash memory device is received and provided to a first decoder for decoding. In response to receiving a first success indicator from the first decoder indicating that the first codeword was successfully decoded, first decoded data is provided from the first decoder to a second decoder for verification of the first decoded data. In response to receiving a first failure indicator from the second decoder indicating that the first decoded data was not verified, the page of the block is identified as being in an erased state based on the first success indicator received from the first decoder and the first failure indicator received from the second decoder.
    Type: Application
    Filed: December 18, 2020
    Publication date: April 8, 2021
    Inventors: Richard David BARNDT, Seyhan KARAKULAK, Scott KAYSER, Majid NEMATI ANARAKI, Anthony Dwayne WEATHERS
  • Publication number: 20210104275
    Abstract: Storage device programming methods, systems and media are described. A method may include encoding data to generate an encoded set of data. A first programming operation may write the encoded set of data to a memory device. The method includes encoding, using a second encoding operation based on the data, to generate a second set of encoded data. The second set of encoded data is stored to a cache. A first decoding operation is performed, based on the second set of encoded data and the encoded set of data, to generate a decoded set of data. A second decoding operation is performed to generate a second decoded set of data. The second decoded set of data is encoded to generate a third set of encoded data. The method includes performing a second programming operation to write the third set of encoded data to the memory device.
    Type: Application
    Filed: December 18, 2020
    Publication date: April 8, 2021
    Inventors: Richard David BARNDT, Bernardo RUB, Mostafa EL GAMAL
  • Patent number: 10884854
    Abstract: The subject technology provides for scanning blocks of a flash memory device for erased pages. A first codeword read from a page of a block in a flash memory device is received and provided to a first decoder for decoding. In response to receiving a first success indicator from the first decoder indicating that the first codeword was successfully decoded, first decoded data is provided from the first decoder to a second decoder for verification of the first decoded data. In response to receiving a first failure indicator from the second decoder indicating that the first decoded data was not verified, the page of the block is identified as being in an erased state based on the first success indicator received from the first decoder and the first failure indicator received from the second decoder.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: January 5, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Richard David Barndt, Seyhan Karakulak, Scott Kayser, Majid Nemati Anaraki, Anthony Dwayne Weathers
  • Patent number: 10878896
    Abstract: Storage device programming methods, systems and media are described. A method may include encoding data to generate an encoded set of data. A first programming operation may write the encoded set of data to a memory device. The method includes encoding, using a second encoding operation based on the data, to generate a second set of encoded data. The second set of encoded data is stored to a cache. A first decoding operation is performed, based on the second set of encoded data and the encoded set of data, to generate a decoded set of data. A second decoding operation is performed to generate a second decoded set of data. The second decoded set of data is encoded to generate a third set of encoded data. The method includes performing a second programming operation to write the third set of encoded data to the memory device.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: December 29, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Richard David Barndt, Bernardo Rub, Mostafa El Gamal
  • Publication number: 20200350007
    Abstract: Storage device programming methods, systems and media are described. A method may include encoding data to generate an encoded set of data. A first programming operation may write the encoded set of data to a memory device. The method includes encoding, using a second encoding operation based on the data, to generate a second set of encoded data. The second set of encoded data is stored to a cache. A first decoding operation is performed, based on the second set of encoded data and the encoded set of data, to generate a decoded set of data. A second decoding operation is performed to generate a second decoded set of data. The second decoded set of data is encoded to generate a third set of encoded data. The method includes performing a second programming operation to write the third set of encoded data to the memory device.
    Type: Application
    Filed: July 22, 2020
    Publication date: November 5, 2020
    Inventors: Richard David BARNDT, Bernardo RUB, Mostafa EL GAMAL
  • Publication number: 20200335173
    Abstract: Systems and methods for read level tracking and optimization are described. Pages from a wordline of a flash memory device read and the raw page data read from the wordline may be buffered in a first set of buffers. The raw page data for each of the pages may be provided to a decoder for decoding and the decoded page data for each of the pages buffered in a second set of buffers. First bin identifiers may be identified for memory cells of the wordline based on the raw page data and second bin identifiers may be identified for the memory cells of the wordline based on the decoded page data. Cell-level statistics may be accumulated based on the first bin identifiers and the second bin identifiers, and a gradient may be determined for respective read levels based on decoding results for each of the pages and the cell-level statistics. Settings for the read levels may be configured in the flash memory device based on the determined gradients.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 22, 2020
    Inventors: Richard David BARNDT, Aldo Giovanni COMETTI, Richard Leo GALBRAITH, Jonas Andrew GOODE, Niranjay RAVINDRAN, Anthony Dwayne WEATHERS
  • Publication number: 20200320009
    Abstract: Storage device programming methods, systems and devices are described. A method may generate a mapping of data based on a set of data, the mapping of data including a first mapped data and a second mapped data. The method may include performing a first programming operation to write, in a first mode, the first mapped data to the memory device. The method may include storing the second mapped data to a cache. The method may include generating a second set of data, based on an inverse mapping of the mapping of data including the second mapped data from the cache and the first mapped data from the memory device, for writing, in a second mode, to the memory device, wherein the second set of data includes the set of data, and the first mode and the second mode correspond to different modes of writing to the memory device.
    Type: Application
    Filed: June 18, 2020
    Publication date: October 8, 2020
    Inventors: Bernie RUB, Mostafa EL GAMAL, Niranjay RAVINDRAN, Richard David BARNDT, Henry CHIN, Ravi J. KUMAR, James FITZPATRICK
  • Patent number: 10748606
    Abstract: Storage device programming methods, systems and media are described. A method may include encoding data to generate an encoded set of data. A first programming operation may write the encoded set of data to a memory device. The method includes encoding, using a second encoding operation based on the data, to generate a second set of encoded data. The second set of encoded data is stored to a cache. A first decoding operation is performed, based on the second set of encoded data and the encoded set of data, to generate a decoded set of data. A second decoding operation is performed to generate a second decoded set of data. The second decoded set of data is encoded to generate a third set of encoded data. The method includes performing a second programming operation to write the third set of encoded data to the memory device.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: August 18, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Richard David Barndt, Bernardo Rub, Mostafa El Gamal
  • Patent number: 10748628
    Abstract: Systems and methods for read level tracking and optimization are described. Pages from a wordline of a flash memory device read and the raw page data read from the wordline may be buffered in a first set of buffers. The raw page data for each of the pages may be provided to a decoder for decoding and the decoded page data for each of the pages buffered in a second set of buffers. First bin identifiers may be identified for memory cells of the wordline based on the raw page data and second bin identifiers may be identified for the memory cells of the wordline based on the decoded page data. Cell-level statistics may be accumulated based on the first bin identifiers and the second bin identifiers, and a gradient may be determined for respective read levels based on decoding results for each of the pages and the cell-level statistics. Settings for the read levels may be configured in the flash memory device based on the determined gradients.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: August 18, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Richard David Barndt, Aldo Giovanni Cometti, Richard Leo Galbraith, Jonas Andrew Goode, Niranjay Ravindran, Anthony Dwayne Weathers
  • Patent number: 10705966
    Abstract: Storage device programming methods, systems and devices are described. A method may generate a mapping of data based on a set of data, the mapping of data including a first mapped data and a second mapped data. The method may include performing a first programming operation to write, in a first mode, the first mapped data to the memory device. The method may include storing the second mapped data to a cache. The method may include generating a second set of data, based on an inverse mapping of the mapping of data including the second mapped data from the cache and the first mapped data from the memory device, for writing, in a second mode, to the memory device, wherein the second set of data includes the set of data, and the first mode and the second mode correspond to different modes of writing to the memory device.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: July 7, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Bernie Rub, Mostafa El Gamal, Niranjay Ravindran, Richard David Barndt, Henry Chin, Ravi J. Kumar, James Fitzpatrick
  • Publication number: 20200194064
    Abstract: Storage device programming methods, systems and media are described. A method may include encoding data to generate an encoded set of data. A first programming operation may write the encoded set of data to a memory device. The method includes encoding, using a second encoding operation based on the data, to generate a second set of encoded data. The second set of encoded data is stored to a cache. A first decoding operation is performed, based on the second set of encoded data and the encoded set of data, to generate a decoded set of data. A second decoding operation is performed to generate a second decoded set of data. The second decoded set of data is encoded to generate a third set of encoded data. The method includes performing a second programming operation to write the third set of encoded data to the memory device.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 18, 2020
    Inventors: Richard David BARNDT, Bernardo RUB, Mostafa EL GAMAL