Patents by Inventor Eswararao Potladhurthi

Eswararao Potladhurthi 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: 10783956
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: September 22, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dinesh Chandra, Eswararao Potladhurthi, Dhani Reddy Sreenivasula Reddy, Krishnan S. Rengarajan
  • Patent number: 10783958
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: September 22, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dinesh Chandra, Eswararao Potladhurthi, Dhani Reddy Sreenivasula Reddy, Krishnan S. Rengarajan
  • Patent number: 10522217
    Abstract: Disclosed is a chip with a memory array and at least one positive voltage boost circuit, which provides positive voltage boost pulses to the sources of pull-up transistors in the memory cells of the array during write operations to store data values in those memory cells and, more specifically, provides positive voltage boost pulses substantially concurrently with wordline deactivation during the write operations to ensure that the data is stored. Application of such pulses to different columns can be performed using different positive voltage boost circuits to minimize power consumption. Also disclosed are a memory array operating method that employs a positive voltage boost circuit and a chip manufacturing method, wherein post-manufacture testing is performed to identify chips having memory arrays that would benefit from positive voltage boost pulses and positive voltage boost circuits are attached to those identified chips and operably connected to the memory arrays.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: December 31, 2019
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Venkatraghavan Bringivijayaraghavan, Eswararao Potladhurthi, George M. Braceras
  • Publication number: 20190304536
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Application
    Filed: April 19, 2019
    Publication date: October 3, 2019
    Inventors: Dinesh CHANDRA, Eswararao POTLADHURTHI, Dhani Reddy Sreenivasula REDDY, Krishnan S. RENGARAJAN
  • Patent number: 10319431
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 11, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dinesh Chandra, Eswararao Potladhurthi, Dhani Reddy Sreenivasula Reddy, Krishnan S. Rengarajan
  • Publication number: 20190147946
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Application
    Filed: January 9, 2019
    Publication date: May 16, 2019
    Inventors: Dinesh CHANDRA, Eswararao POTLADHURTHI, Dhani Reddy Sreenivasula REDDY, Krishnan S. RENGARAJAN
  • Patent number: 10217510
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: February 26, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dinesh Chandra, Eswararao Potladhurthi, Dhani Reddy Sreenivasula Reddy, Krishnan S. Rengarajan
  • Patent number: 9984742
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: May 29, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dinesh Chandra, Eswararao Potladhurthi, Dhani Reddy Sreenivasula Reddy, Krishnan S. Rengarajan
  • Publication number: 20180130522
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 10, 2018
    Inventors: Dinesh CHANDRA, Eswararao POTLADHURTHI, Dhani Reddy Sreenivasula REDDY, Krishnan S. RENGARAJAN
  • Publication number: 20180068717
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Application
    Filed: October 31, 2017
    Publication date: March 8, 2018
    Inventors: Dinesh CHANDRA, Eswararao POTLADHURTHI, Dhani Reddy Sreenivasula REDDY, Krishnan S. RENGARAJAN
  • Patent number: 9847119
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: December 19, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dinesh Chandra, Eswararao Potladhurthi, Dhani Reddy Sreenivasula Reddy, Krishnan S. Rengarajan
  • Publication number: 20170004876
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Application
    Filed: September 15, 2016
    Publication date: January 5, 2017
    Inventors: Dinesh CHANDRA, Eswararao POTLADHURTHI, Dhani Reddy Sreenivasula REDDY, Krishnan S. RENGARAJAN
  • Patent number: 9496025
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: November 15, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dinesh Chandra, Eswararao Potladhurthi, Dhani Reddy Sreenivasula Reddy, Krishnan S. Rengarajan
  • Publication number: 20160232966
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Application
    Filed: April 13, 2016
    Publication date: August 11, 2016
    Inventors: Dinesh CHANDRA, Eswararao POTLADHURTHI, Dhani Reddy Sreenivasula REDDY, Krishnan S. RENGARAJAN
  • Publication number: 20160203857
    Abstract: An apparatus and method are provided for implementing write assist with boost attenuation for static random access memory (SRAM) arrays. The apparatus includes a memory array comprising a plurality of SRAM cells. The apparatus further includes a write driver connected to each of a differential pair of bit lines in each of the plurality of SRAM cells of the memory array. The apparatus further includes a write assist attenuation circuit connected to the write driver, the write assist attenuation circuit comprising a clamping device configured to modify a control signal as a function of supply voltage and process to attenuate an amount of boost applied to pull one of the bit lines below ground in an active phase of a write cycle.
    Type: Application
    Filed: January 12, 2015
    Publication date: July 14, 2016
    Inventors: Dinesh CHANDRA, Eswararao POTLADHURTHI, Dhani Reddy Sreenivasula REDDY, Krishnan S. RENGARAJAN
  • Publication number: 20110133809
    Abstract: A semiconductor device includes first and second signal lines; a sense amplifier amplifying potential difference occurring in the first and second signal lines; a cancel charge generator circuit producing cancel charge that corresponds to offset voltage in the sense amplifier; a cancel charge storage circuit storing the cancel charge; and a cancel charge feed circuit feeding the cancel charge that has been stored in the cancel charge storage circuit to the first and second signal lines to cancel the offset voltage.
    Type: Application
    Filed: December 3, 2009
    Publication date: June 9, 2011
    Applicant: Elpida Memory, Inc.
    Inventors: Ankur Goel, Eswararao Potladhurthi