Patents by Inventor Sreenivasula Reddy Dhani Reddy

Sreenivasula Reddy Dhani Reddy 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: 10726909
    Abstract: Disclosed is a multi-port memory array configured to minimize resistance-capacitance (RC) delay caused by wordline coupling. In each row of the array, a first voltage boost circuit is connected to the distal ends of a first wordline and a second wordline and boosts a first voltage on the first wordline during an access period when the first voltage is transitioning from low to high and when, concurrently, a second voltage on the second wordline is either low or transitioning to low. Optionally, a second voltage boost circuit is also connected to the distal ends of the first and second wordlines and boosts the second voltage on the second wordline during a different access period when the second voltage is transitioning from low to high and when, concurrently, the first voltage on the first wordline is either at low or transitioning from high to low. Also disclosed is a corresponding method.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: July 28, 2020
    Assignee: Marvell International Ltd.
    Inventors: Sreenivasula Reddy Dhani Reddy, Vinay Bhat Soori, Md Nadeem Iqbal
  • Patent number: 10600474
    Abstract: A circuit includes a core having a memory array. The memory array includes memory cells and bitlines, and is arranged in columns. The core includes a metallization layer having connections to the memory array, which is devoid of memory cells. Digit lines are connected to the bitlines of a column of the memory array. A write driver is connected to the digit lines. A write assist circuit is connected to the write driver. The write assist circuit maintains a voltage on the digit lines prior to write operations and provides a boost voltage to the digit lines during write operations. A wire bridge located in the metallization layer of the core connects the write assist circuit to the write driver.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: March 24, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Sreenivasula Reddy Dhani Reddy, Sreejith Chidambaran, Binu Jose, Venkatraghavan Bringivijayaraghavan
  • Publication number: 20190279708
    Abstract: A circuit includes a core having a memory array. The memory array includes memory cells and bitlines, and is arranged in columns. The core includes a metallization layer having connections to the memory array, which is devoid of memory cells. Digit lines are connected to the bitlines of a column of the memory array. A write driver is connected to the digit lines. A write assist circuit is connected to the write driver. The write assist circuit maintains a voltage on the digit lines prior to write operations and provides a boost voltage to the digit lines during write operations. A wire bridge located in the metallization layer of the core connects the write assist circuit to the write driver.
    Type: Application
    Filed: May 29, 2019
    Publication date: September 12, 2019
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Sreenivasula Reddy Dhani Reddy, Sreejith Chidambaran, Binu Jose, Venkatraghavan Bringivijayaraghavan
  • Patent number: 10381069
    Abstract: A circuit includes a core having a memory array. The memory array includes memory cells and bitlines, and is arranged in columns. The core includes a metallization layer having connections to the memory array, which is devoid of memory cells. Digit lines are connected to the bitlines of a column of the memory array. A write driver is connected to the digit lines. A write assist circuit is connected to the write driver. The write assist circuit maintains a voltage on the digit lines prior to write operations and provides a boost voltage to the digit lines during write operations. A wire bridge located in the metallization layer of the core connects the write assist circuit to the write driver.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: August 13, 2019
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Sreenivasula Reddy Dhani Reddy, Sreejith Chidambaran, Binu Jose, Venkatraghavan Bringivijayaraghavan
  • Publication number: 20190244658
    Abstract: A circuit includes a core having a memory array. The memory array includes memory cells and bitlines, and is arranged in columns. The core includes a metallization layer having connections to the memory array, which is devoid of memory cells. Digit lines are connected to the bitlines of a column of the memory array. A write driver is connected to the digit lines. A write assist circuit is connected to the write driver. The write assist circuit maintains a voltage on the digit lines prior to write operations and provides a boost voltage to the digit lines during write operations. A wire bridge located in the metallization layer of the core connects the write assist circuit to the write driver.
    Type: Application
    Filed: February 8, 2018
    Publication date: August 8, 2019
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Sreenivasula Reddy Dhani Reddy, Sreejith Chidambaran, Binu Jose, Venkatraghavan Bringivijayaraghavan
  • Patent number: 9911474
    Abstract: Devices include an array of memory cells arranged in rows and columns. Wordlines are connected to the memory cells, and each of the wordlines is connected to a distinct row of the array of the memory cells. A wordline driver circuit is connected to a near end of the wordlines. The wordline driver circuit outputs a wordline select signal. Also, a feedback circuit is connected to a far end of each of the wordlines, opposite the near end of the wordlines. The feedback circuit includes first transistors (gated by the internal clock signal and the wordline select signal) electrically connecting a relatively lower voltage source to the far end of the wordlines; and second transistors (also gated by the internal clock signal and the wordline select signal) electrically connecting a relatively higher voltage source to the far end of the wordlines.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: March 6, 2018
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Sreenivasula Reddy Dhani Reddy, Arjun Sankar, Sushma Nirmala Sambatur