Patents by Inventor Kalyan Chakravarthy C. Kavalipurapu

Kalyan Chakravarthy C. Kavalipurapu 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: 11861236
    Abstract: A memory device includes a memory array comprising a plurality of planes, a primary plane driver circuit comprising components to support read operations, program operations, and erase operations on any of the plurality of planes, and a secondary plane driver circuit comprising components to support read operations on an associated one of the plurality of planes. The primary plane driver circuit is configured to perform a first read operation on a first plane of the plurality of planes and the secondary plane driver circuit is configured to perform a second read operation on a second plane of the plurality of planes concurrently with the first read operation.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: January 2, 2024
    Assignee: Micron Technology, Inc.
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Chang H. Siau, Shigekazu Yamada
  • Patent number: 11682462
    Abstract: Disclosed in some examples are methods, systems, devices, and machine-readable mediums for compensating for charge loss effects. In some examples, a charge loss may be estimated by a charge loss monitor for a particular unit of a NAND device and may be utilized to select a charge loss compensation scheme. The charge loss may be estimated by the charge loss estimation process by determining a reference read voltage and calculating a bit count resulting from a read at that reference read voltage. The number of bits returned may be used to select the particular charge loss compensation scheme.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: June 20, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Jung Sheng Hoei
  • Patent number: 11495306
    Abstract: An electronic device comprises a multi-chip package including multiple memory dice that include a memory array, charging circuitry, polling circuitry and a control unit. The charging circuitry is configured to perform one or more memory events in a high current mode using a high current level or in a low current mode using a lower current level. The polling circuitry is configured to poll a power status node common to the multiple memory dice to determine availability of the high current mode. The control unit is configured to operate the charging circuitry in the high current mode to perform the one or more memory events when the polling circuitry indicates that the high current mode is available, and operate the charging circuitry in the low current mode to perform the one or more memory events when the polling circuitry indicates that the high current mode is unavailable.
    Type: Grant
    Filed: February 15, 2021
    Date of Patent: November 8, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Michele Piccardi, Xiaojiang Guo, Kalyan Chakravarthy C. Kavalipurapu
  • Publication number: 20220276806
    Abstract: A memory device includes a memory array comprising a plurality of planes, a primary plane driver circuit comprising components to support read operations, program operations, and erase operations on any of the plurality of planes, and a secondary plane driver circuit comprising components to support read operations on an associated one of the plurality of planes. The primary plane driver circuit is configured to perform a first read operation on a first plane of the plurality of planes and the secondary plane driver circuit is configured to perform a second read operation on a second plane of the plurality of planes concurrently with the first read operation.
    Type: Application
    Filed: May 11, 2022
    Publication date: September 1, 2022
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Chang H. Siau, Shigekazu Yamada
  • Patent number: 11354067
    Abstract: A memory device includes a memory array comprising a plurality of planes, a primary plane driver circuit comprising components to support read operations, program operations, and erase operations on any of the plurality of planes, and a secondary plane driver circuit comprising components to support read operations on an associated one of the plurality of planes. The primary plane driver circuit is configured to perform a first read operation on a first plane of the plurality of planes and the secondary plane driver circuit is configured to perform a second read operation on a second plane of the plurality of planes concurrently with the first read operation.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: June 7, 2022
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Chang H. Siau, Shigekazu Yamada
  • Publication number: 20220043597
    Abstract: A memory device includes a memory array comprising a plurality of planes, a primary plane driver circuit comprising components to support read operations, program operations, and erase operations on any of the plurality of planes, and a secondary plane driver circuit comprising components to support read operations on an associated one of the plurality of planes. The primary plane driver circuit is configured to perform a first read operation on a first plane of the plurality of planes and the secondary plane driver circuit is configured to perform a second read operation on a second plane of the plurality of planes concurrently with the first read operation.
    Type: Application
    Filed: August 5, 2020
    Publication date: February 10, 2022
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Chang H. Siau, Shigekazu Yamada
  • Publication number: 20210358556
    Abstract: Disclosed in some examples are methods, systems, devices, and machine-readable mediums for compensating for charge loss effects. In some examples, a charge loss may be estimated by a charge loss monitor for a particular unit of a NAND device and may be utilized to select a charge loss compensation scheme. The charge loss may be estimated by the charge loss estimation process by determining a reference read voltage and calculating a bit count resulting from a read at that reference read voltage. The number of bits returned may be used to select the particular charge loss compensation scheme.
    Type: Application
    Filed: July 30, 2021
    Publication date: November 18, 2021
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Jung Sheng Hoei
  • Publication number: 20210264988
    Abstract: Disclosed in some examples are methods, systems, devices, and machine-readable mediums for compensating for charge loss effects. In some examples, a charge loss may be estimated by a charge loss monitor for a particular unit of a NAND device and may be utilized to select a charge loss compensation scheme. The charge loss may be estimated by the charge loss estimation process by determining a reference read voltage and calculating a bit count resulting from a read at that reference read voltage. The number of bits returned may be used to select the particular charge loss compensation scheme.
    Type: Application
    Filed: February 25, 2020
    Publication date: August 26, 2021
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Jung Sheng Hoei
  • Patent number: 11081189
    Abstract: Disclosed in some examples are methods, systems, devices, and machine-readable mediums for compensating for charge loss effects. In some examples, a charge loss may be estimated by a charge loss monitor for a particular unit of a NAND device and may be utilized to select a charge loss compensation scheme. The charge loss may be estimated by the charge loss estimation process by determining a reference read voltage and calculating a bit count resulting from a read at that reference read voltage. The number of bits returned may be used to select the particular charge loss compensation scheme.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: August 3, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Jung Sheng Hoei
  • Publication number: 20210166770
    Abstract: An electronic device comprises a multi-chip package including multiple memory dice that include a memory array, charging circuitry, polling circuitry and a control unit. The charging circuitry is configured to perform one or more memory events in a high current mode using a high current level or in a low current mode using a lower current level. The polling circuitry is configured to poll a power status node common to the multiple memory dice to determine availability of the high current mode. The control unit is configured to operate the charging circuitry in the high current mode to perform the one or more memory events when the polling circuitry indicates that the high current mode is available, and operate the charging circuitry in the low current mode to perform the one or more memory events when the polling circuitry indicates that the high current mode is unavailable.
    Type: Application
    Filed: February 15, 2021
    Publication date: June 3, 2021
    Inventors: Michele Piccardi, Xiaojiang Guo, Kalyan Chakravarthy C. Kavalipurapu