Patents by Inventor Sujeet Ayyapureddi

Sujeet Ayyapureddi 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).

  • Publication number: 20200273535
    Abstract: A memory device includes a memory bank accessible via a plurality of memory addresses. The memory device further includes a fuse array including a plurality of fuse banks. A fuse bank of the plurality of fuse banks includes a fuse circuit, which includes a fuse latch having first input circuitry. The fuse latch is implemented to store a first bit of a first memory address received at the first input circuitry. The fuse circuit also includes a matching circuit coupled to the first input circuitry. The matching circuit is implemented to receive a first bit of a second memory address at the first input circuitry and to output, at output circuitry, a comparison result based at least in part on the first bit of the first memory address and the first bit of the second memory address.
    Type: Application
    Filed: March 6, 2020
    Publication date: August 27, 2020
    Inventor: Sujeet Ayyapureddi
  • Patent number: 10600498
    Abstract: A memory device includes a memory bank accessible via a plurality of memory addresses. The memory device further includes a fuse array including a plurality of fuse banks. A fuse bank of the plurality of fuse banks includes a fuse circuit, which includes a fuse latch having first input circuitry. The fuse latch is implemented to store a first bit of a first memory address received at the first input circuitry. The fuse circuit also includes a matching circuit coupled to the first input circuitry. The matching circuit is implemented to receive a first bit of a second memory address at the first input circuitry and to output, at output circuitry, a comparison result based at least in part on the first bit of the first memory address and the first bit of the second memory address.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 24, 2020
    Assignee: Micron Technology, Inc.
    Inventor: Sujeet Ayyapureddi
  • Publication number: 20190362805
    Abstract: Apparatuses and methods for latching redundancy repair addresses at a memory are disclosed. An example apparatus includes block of memory including primary memory and a plurality of redundant memory units and repair logic. The repair logic including a plurality of repair blocks. A repair block of the plurality of repair blocks is configured to receive a set of repair address bits associated with a memory address for defective memory of the block of memory and to latch the set of repair address bits at a respective set of latches. The repair block is further configured to, in response to receipt of a memory access request corresponding to the set of repair address bits latched at the repair block, redirecting the memory access request to a redundant memory unit associated with the repair block.
    Type: Application
    Filed: August 12, 2019
    Publication date: November 28, 2019
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Christopher Morzano, Sujeet Ayyapureddi
  • Patent number: 10381103
    Abstract: Apparatuses and methods for latching redundancy repair addresses at a memory are disclosed. An example apparatus includes block of memory including primary memory and a plurality of redundant memory units and repair logic. The repair logic including a plurality of repair blocks. A repair block of the plurality of repair blocks is configured to receive a set of repair address bits associated with a memory address for defective memory of the block of memory and to latch the set of repair address bits at a respective set of latches. The repair block is further configured to, in response to receipt of a memory access request corresponding to the set of repair address bits latched at the repair block, redirecting the memory access request to a redundant memory unit associated with the repair block.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: August 13, 2019
    Assignee: Micron Technology, Inc.
    Inventors: Christopher Morzano, Sujeet Ayyapureddi
  • Publication number: 20190057758
    Abstract: Apparatuses and methods for latching redundancy repair addresses at a memory are disclosed. An example apparatus includes block of memory including primary memory and a plurality of redundant memory units and repair logic. The repair logic including a plurality of repair blocks. A repair block of the plurality of repair blocks is configured to receive a set of repair address bits associated with a memory address for defective memory of the block of memory and to latch the set of repair address bits at a respective set of latches. The repair block is further configured to, in response to receipt of a memory access request corresponding to the set of repair address bits latched at the repair block, redirecting the memory access request to a redundant memory unit associated with the repair block.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 21, 2019
    Applicant: Micron Technology, Inc.
    Inventors: Christopher Morzano, Sujeet Ayyapureddi
  • Patent number: 9810589
    Abstract: There is provided a system and method for automatically calibrating a temperature sensor. More specifically, there is provided a system including a temperature sensor that includes a first resistance configured to indicate a temperature of the temperature sensor and a second resistance, in series with the first resistor, wherein the second resistance is adjustable to calibrate the first resistance, and a calibration circuit, coupled to the temperature sensor and configured to automatically calibrate the first resistance.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: November 7, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Manoj Sinha, Sujeet Ayyapureddi, Brandon Roth
  • Patent number: 9740269
    Abstract: An arbitration system and method is disclosed. The apparatus includes first and second memory devices, and a resistor coupled in common to the first and second memory devices, the first memory device including a first calibration circuit configured to perform, when activated, a first calibration operation based on the resistor and a first arbiter configured to activate the first calibration circuit responsive, at least in part, to an assertion of a first command or keep the first calibration circuit inactive irrespective of the assertion of the first command.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: August 22, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Suryanarayana Tatapudi, Sujeet Ayyapureddi
  • Publication number: 20170228010
    Abstract: An arbitration system and method is disclosed. The apparatus includes first and second memory devices and a resistor coupled in common to the first and second memory devices, the first memory device including a first calibration circuit configured to perform, when activated, a first calibration operation based on the resistor and a first arbiter configured to activate the first calibration circuit responsive, at least in part, to an assertion of a first command or keep the first calibration circuit inactive irrespective of the assertion of the first command.
    Type: Application
    Filed: April 26, 2017
    Publication date: August 10, 2017
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Suryanarayana Tatapudi, Sujeet Ayyapureddi
  • Patent number: 9665462
    Abstract: An arbitration system and method is disclosed. The apparatus includes first and second memory devices, and a resistor coupled in common to the first and second memory devices, the first memory device including a first calibration circuit configured to perform, when activated, a first calibration operation based on the resistor and a first arbiter configured to activate the first calibration circuit responsive, at least in part, to an assertion of a first command or keep the first calibration circuit inactive irrespective of the assertion of the first command.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: May 30, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Suryanarayana Tatapudi, Sujeet Ayyapureddi
  • Publication number: 20170109249
    Abstract: An arbitration system and method is disclosed. The apparatus includes first and second memory devices, and a resistor coupled in common to the first and second memory devices, the first memory device including a first calibration circuit configured to perform, when activated, a first calibration operation based on the resistor and a first arbiter configured to activate the first calibration circuit responsive, at least in part, to an assertion of a first command or keep the first calibration circuit inactive irrespective of the assertion of the first command.
    Type: Application
    Filed: October 14, 2015
    Publication date: April 20, 2017
    Inventors: Suryanarayana Tatapudi, Sujeet Ayyapureddi
  • Patent number: 9570201
    Abstract: Apparatus and methods for hybrid post package repair are disclosed. One such apparatus may include a package including memory cells and volatile memory. The volatile memory may be configured to store defective address data corresponding to a first portion of the memory cells that are deemed defective post-packaging. The apparatus may also include a decoder configured to select a second portion of the memory cells instead of the first portion of the memory cells when received current address data corresponding to an address to be accessed matches the defective address data stored in the volatile memory. The apparatus may also include non-volatile memory in the package. The apparatus may also include a mapping logic circuit in the package. The mapping logic circuit may be configured to program the replacement address data to the non-volatile memory subsequent to the defective address data being stored to the volatile memory.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: February 14, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Donald M. Morgan, Sujeet Ayyapureddi
  • Patent number: 9508409
    Abstract: Apparatuses and methods for implementing masked write commands are disclosed herein. An example apparatus may include a memory bank, a local buffer circuit, and an address control circuit. The local buffer circuit may be associated with the memory bank. The address control circuit may be coupled to the memory bank and configured to receive a command and an address associated with the command. The address control circuit may include a global buffer circuit configured to store the address. The address control circuit may further be configured to delay the command using one of a plurality of command paths based, at least in part, on a write latency and to provide the address stored in the global buffer circuit to the local buffer circuit to be stored therein.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: November 29, 2016
    Assignee: Micron Technology, Inc.
    Inventors: Mark K. Hadrick, Jeffrey P. Wright, Victor Wong, Simon J. Lovett, Donald M. Morgan, William F. Jones, Sujeet Ayyapureddi, Dean D. Gans, Jongtae Kwak
  • Publication number: 20160307647
    Abstract: Apparatus and methods for hybrid post package repair are disclosed. One such apparatus may include a package including memory cells and volatile memory. The volatile memory may be configured to store defective address data corresponding to a first portion of the memory cells that are deemed defective post-packaging. The apparatus may also include a decoder configured to select a second portion of the memory cells instead of the first portion of the memory cells when received current address data corresponding to an address to be accessed matches the defective address data stored in the volatile memory. The apparatus may also include non-volatile memory in the package. The apparatus may also include a mapping logic circuit in the package. The mapping logic circuit may be configured to program the replacement address data to the non-volatile memory subsequent to the defective address data being stored to the volatile memory.
    Type: Application
    Filed: May 16, 2016
    Publication date: October 20, 2016
    Applicant: Micron Technology, Inc.
    Inventors: DONALD M. MORGAN, Sujeet Ayyapureddi
  • Patent number: 9405721
    Abstract: Apparatuses and methods for performing a data bus inversion operation (DBI) are described. An example apparatus includes a DBI circuit configured to, in parallel, determine preliminary DBI bits based on a block of data. Individual preliminary DBI bits are associated with respective sub-blocks of the block of data. The DBI circuit is further configured to serially determine DBI bits based on the preliminary DBI bits. Individual ones of the DBI bits are associated with respective ones of the sub-blocks. The DBI circuit is further configured to invert bits of individual sub-blocks responsive to the respective associated DBI bits having a particular logical value to provide DBI data. The apparatus further includes data outputs configured to serially output sub-blocks of the DBI data and the DBI bits.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: August 2, 2016
    Assignee: Micron Technology, Inc.
    Inventors: Sujeet Ayyapureddi, Don Morgan, Myung Gyoo Won
  • Patent number: 9349491
    Abstract: Apparatus and methods for hybrid post package repair are disclosed. One such apparatus may include a package including memory cells and volatile memory. The volatile memory may be configured to store defective address data corresponding to a first portion of the memory cells that are deemed defective post-packaging. The apparatus may also include a decoder configured to select a second portion of the memory cells instead of the first portion of the memory cells when received current address data corresponding to an address to be accessed matches the defective address data stored in the volatile memory. The apparatus may also include non-volatile memory in the package. The apparatus may also include a mapping logic circuit in the package. The mapping logic circuit may be configured to program the replacement address data to the non-volatile memory subsequent to the defective address data being stored to the volatile memory.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: May 24, 2016
    Assignee: Micron Technology, Inc.
    Inventors: Donald M. Morgan, Sujeet Ayyapureddi
  • Patent number: 9213553
    Abstract: Driver systems and methods are provided, such as those that include identifying a process corner of a driver; and configuring the driver based on the identified process corner. Further embodiments provide a method that includes detecting a process corner of a driver, setting a reference voltage of a calibration circuit based on the process corner detected, and configuring the driver based on the reference voltage.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: December 15, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Sujeet Ayyapureddi, Raghukiran Sreeramaneni, Suryanarayana B. Tatapudi
  • Publication number: 20150356047
    Abstract: Apparatuses and methods for performing a data bus inversion operation (DBI) are described. An example apparatus includes a DBI circuit configured to, in parallel, determine preliminary DBI bits based on a block of data. Individual preliminary DBI bits are associated with respective sub-blocks of the block of data. The DBI circuit is further configured to serially determine DBI bits based on the preliminary DBI bits. Individual ones of the DBI bits are associated with respective ones of the sub-blocks. The DBI circuit is further configured to invert bits of individual sub-blocks responsive to the respective associated DBI bits having a particular logical value to provide DBI data. The apparatus further includes data outputs configured to serially output sub-blocks of the DBI data and the DBI bits.
    Type: Application
    Filed: June 6, 2014
    Publication date: December 10, 2015
    Inventors: Sujeet Ayyapureddi, Don Morgan, Myung Gyoo Won
  • Publication number: 20150302907
    Abstract: Apparatuses and methods for implementing masked write commands are disclosed herein. An example apparatus may include a memory bank, a local buffer circuit, and an address control circuit. The local buffer circuit may be associated with the memory bank. The address control circuit may be coupled to the memory bank and configured to receive a command and an address associated with the command. The address control circuit may include a global buffer circuit configured to store the address. The address control circuit may further be configured to delay the command using one of a plurality of command paths based, at least in part, on a write latency and to provide the address stored in the global buffer circuit to the local buffer circuit to be stored therein.
    Type: Application
    Filed: April 16, 2014
    Publication date: October 22, 2015
    Applicant: Micron Technology, Inc.
    Inventors: Mark K. Hadrick, Jeffrey P. Wright, Victor Wong, Simon J. Lovett, Donald M. Morgan, William F. Jones, Sujeet Ayyapureddi, Dean D. Gans, Jongtae Kwak
  • Publication number: 20150023386
    Abstract: There is provided a system and method for automatically calibrating a temperature sensor. More specifically, there is provided a system including a temperature sensor that includes a first resistance configured to indicate a temperature of the temperature sensor and a second resistance, in series with the first resistor, wherein the second resistance is adjustable to calibrate the first resistance, and a calibration circuit, coupled to the temperature sensor and configured to automatically calibrate the first resistance.
    Type: Application
    Filed: October 6, 2014
    Publication date: January 22, 2015
    Inventors: Manoj Sinha, Sujeet Ayyapureddi, Brandon Roth
  • Patent number: 8862421
    Abstract: There is provided a system and method for automatically calibrating a temperature sensor. More specifically, there is provided a system including a temperature sensor that includes a first resistance configured to indicate a temperature of the temperature sensor and a second resistance, in series with the first resistor, wherein the second resistance is adjustable to calibrate the first resistance, and a calibration circuit, coupled to the temperature sensor and configured to automatically calibrate the first resistance.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: October 14, 2014
    Assignee: Micron Technology, Inc.
    Inventors: Manoj Sinha, Sujeet Ayyapureddi, Brandon Roth