Patents by Inventor Ramesh Raghavan

Ramesh Raghavan 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: 10184644
    Abstract: A bracket for use with a recessed light fixture includes a side wall. A first bendable tab is positioned in the side wall. A second bendable tab is positioned in the side wall, the second tab being offset from the first tab. A retainer extends from the side wall.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: January 22, 2019
    Assignee: Hubbell Incorporated
    Inventors: Nancy R. Stathes, Federico Collado, Ramesh Raghavan, Shailesh Naik, Michael Swern
  • Patent number: 10168012
    Abstract: A modular vapor-tight light fixture is provided herein which generally includes first and second vapor-tight light modules, and a coupling for connecting the first and second vapor-tight light modules. Each of the vapor-tight light modules includes: a channel housing; a lens secured to the channel housing; a plurality of solid state light generating elements; and, first and second end caps. Each of the channel housings includes first and second rails which each define a mounting channel. The coupling includes mounting strip portions configured such that, with the first and second vapor-tight light modules being adjacent, the mounting strip portions are simultaneously received in the mounting channels of both the first and second vapor-tight light modules. Advantageously, with the subject invention, fully enclosed vapor-tight light modules may be provided at shorter lengths which are connected by the coupling to provide a fixture comparable in length to prior-art vapor-tight light fixtures.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: January 1, 2019
    Assignee: MAXLITE, Inc.
    Inventors: Ramesh Raghavan, Jun Xiang
  • Patent number: 9859177
    Abstract: Aspects of the present disclosure include methods and test structures for an intermediate metal level of an integrated circuit (IC). A method according to the present disclosure can include: fabricating a first plurality of metal levels including an intermediate metal level of an IC structure, the intermediate metal level being one of a plurality of metal levels in the IC structure other than a capping metal level of the IC structure; performing a first functional test on a first circuit positioned within the intermediate metal level; fabricating a second plurality of metal levels after performing the first functional test, the second plurality of metal levels including the capping metal level of the IC structure; and performing a second functional test on a second circuit positioned within the plurality of metal levels, after the fabricating of the capping metal level.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: January 2, 2018
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Janakiraman Viraraghavan, Ramesh Raghavan, Balaji Jayaraman, Thejas Kempanna, Rajesh R. Tummuru, Toshiaki Kirihata
  • Patent number: 9786333
    Abstract: A multi-time programmable memory (MTPM) memory cell and method of operating. Each MTPM bit cell including a first FET transistor and a second FET transistor having a first common connection, and said second FET transistor and a third FET transistor having a second common connection, said first and second connected FET transistors programmable to store a first bit value, and said second FET and said third connected FET transistors programmable to store a second bit value, wherein said first FET transistor exhibits a low threshold voltage value (LVT), said second FET transistor exhibits an elevated threshold voltage value HVT and said third FET transistor exhibits a threshold value LVT lower than HVT. The MTPM cell enables two bits of information to be stored as default bit values like an electrical fuse. To store opposite bit values, the LVT transistors are programmed such that their threshold voltage is higher than that of HVT.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: October 10, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Janakiraman Viraraghavan, Thejas Kempanna, Rajesh Reddy Tummuru, Toshiaki Kirihata
  • Patent number: 9761285
    Abstract: Approaches for a circuit are provided. The circuit includes a sense amplifier circuit which includes a plurality of transistors enabled by a sense amplifier enable signal to output a first output data line true signal and a second output data line complement signal to a latching circuit, and the latching circuit which includes a primary driver actively driven by the first output data line true signal and a secondary driver actively driven by the second output data line complement signal such that the latching circuit outputs a read global data line.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: September 12, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Venkatraghavan Bringivijayaraghavan, Ramesh Raghavan
  • Publication number: 20170256468
    Abstract: Aspects of the present disclosure include methods and test structures for an intermediate metal level of an integrated circuit (IC). A method according to the present disclosure can include: fabricating a first plurality of metal levels including an intermediate metal level of an IC structure, the intermediate metal level being one of a plurality of metal levels in the IC structure other than a capping metal level of the IC structure; performing a first functional test on a first circuit positioned within the intermediate metal level; fabricating a second plurality of metal levels after performing the first functional test, the second plurality of metal levels including the capping metal level of the IC structure; and performing a second functional test on a second circuit positioned within the plurality of metal levels, after the fabricating of the capping metal level.
    Type: Application
    Filed: March 7, 2016
    Publication date: September 7, 2017
    Inventors: Janakiraman Viraraghavan, Ramesh Raghavan, Balaji Jayaraman, Thejas Kempanna, Rajesh R. Tummuru, Toshiaki Kirihata
  • Publication number: 20170249976
    Abstract: Approaches for a circuit are provided. The circuit includes a sense amplifier circuit which includes a plurality of transistors enabled by a sense amplifier enable signal to output a first output data line true signal and a second output data line complement signal to a latching circuit, and the latching circuit which includes a primary driver actively driven by the first output data line true signal and a secondary driver actively driven by the second output data line complement signal such that the latching circuit outputs a read global data line.
    Type: Application
    Filed: February 26, 2016
    Publication date: August 31, 2017
    Inventors: Venkatraghavan Bringivijayaraghavan, Ramesh Raghavan
  • Patent number: 9721673
    Abstract: A Multi-Time-Programmable-Memory (MTPM) array architecture, whose structure comprising of having Metal-Oxide-Semiconductor Field-Effect-Transistor (MOSFET) memory elements arranged in a set of twin-pairs coupled by wordlines (WLs), bitlines (BLs) and sourcelines (SLs). More specifically, the use of inactive portions of the MTPM array structure as substitutes for conventional BL write driver areas by utilizing a set of twin-pairs acting in parallel. These substituted twin-pair sets will improve programming efficiency (VGS) and retention (VDS) through a lowering Interconnect (IR) drop and VDS drops at the BL write driver.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: August 1, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Rajesh R. Tummuru, Thejas Kempanna, Janakiraman Viraraghavan
  • Publication number: 20170206938
    Abstract: A multi-time programmable memory (MTPM) memory cell and method of operating. Each MTPM bit cell including a first FET transistor and a second FET transistor having a first common connection, and said second FET transistor and a third FET transistor having a second common connection, said first and second connected FET transistors programmable to store a first bit value, and said second FET and said third connected FET transistors programmable to store a second bit value, wherein said first FET transistor exhibits a low threshold voltage value (LVT), said second FET transistor exhibits an elevated threshold voltage value HVT and said third FET transistor exhibits a threshold value LVT lower than HVT. The MTPM cell enables two bits of information to be stored as default bit values like an electrical fuse. To store opposite bit values, the LVT transistors are programmed such that their threshold voltage is higher than that of HVT.
    Type: Application
    Filed: April 4, 2017
    Publication date: July 20, 2017
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Janakiraman Viraraghavan, Thejas Kempanna, Rajesh Reddy Tummuru, Toshiaki Kirihata
  • Publication number: 20170162234
    Abstract: A multi-time programmable memory (MTPM) memory cell and method of operating. Each MTPM bit cell including a first FET transistor and a second FET transistor having a first common connection, and said second FET transistor and a third FET transistor having a second common connection, said first and second connected FET transistors programmable to store a first bit value, and said second FET and said third connected FET transistors programmable to store a second bit value, wherein said first FET transistor exhibits a low threshold voltage value (LVT), said second FET transistor exhibits an elevated threshold voltage value HVT and said third FET transistor exhibits a threshold value LVT lower than HVT. The MTPM cell enables two bits of information to be stored as default bit values like an electrical fuse. To store opposite bit values, the LVT transistors are programmed such that their threshold voltage is higher than that of HVT.
    Type: Application
    Filed: December 7, 2015
    Publication date: June 8, 2017
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Janakiraman Viraraghavan, Thejas Kempanna, Rajesh Reddy Tummuru, Toshiaki Kirihata
  • Patent number: 9659604
    Abstract: A multi-time programmable memory (MTPM) memory cell and method of operating. Each MTPM bit cell including a first FET transistor and a second FET transistor having a first common connection, and said second FET transistor and a third FET transistor having a second common connection, said first and second connected FET transistors programmable to store a first bit value, and said second FET and said third connected FET transistors programmable to store a second bit value, wherein said first FET transistor exhibits a low threshold voltage value (LVT), said second FET transistor exhibits an elevated threshold voltage value HVT and said third FET transistor exhibits a threshold value LVT lower than HVT. The MTPM cell enables two bits of information to be stored as default bit values like an electrical fuse. To store opposite bit values, the LVT transistors are programmed such that their threshold voltage is higher than that of HVT.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: May 23, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Janakiraman Viraraghavan, Thejas Kempanna, Rajesh Reddy Tummuru, Toshiaki Kirihata
  • Patent number: 9589658
    Abstract: Approaches for a memory including a cell array are provided. The memory includes a first device of the cell array which is connected to a bitline and a node and controlled by a word line, and a second device of the cell array which comprises a third device which is connected to a source line and the node and controlled by the word line and a fourth device which is connected between the word line and the node. In the memory, in response to another word line in the cell array being activated and the word line not being activated to keep the first device in an unprogrammed state, the third device isolates and floats the node such that a voltage level of a gate to source of the first device is clamped down by the fourth device to a voltage level around zero volts.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: March 7, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Navin Agarwal, Aditya S. Auyisetty, Balaji Jayaraman, Thejas Kempanna, Toshiaki Kirihata, Ramesh Raghavan, Krishnan S. Rengarajan, Rajesh R. Tummuru, Jay M. Shah, Janakiraman Viraraghavan
  • Publication number: 20170053705
    Abstract: Approaches for a memory including a cell array are provided. The memory includes a first device of the cell array which is connected to a bitline and a node and controlled by a word line, and a second device of the cell array which comprises a third device which is connected to a source line and the node and controlled by the word line and a fourth device which is connected between the word line and the node. In the memory, in response to another word line in the cell array being activated and the word line not being activated to keep the first device in an unprogrammed state, the third device isolates and floats the node such that a voltage level of a gate to source of the first device is clamped down by the fourth device to a voltage level around zero volts.
    Type: Application
    Filed: August 18, 2015
    Publication date: February 23, 2017
    Inventors: Navin AGARWAL, Aditya S. AUYISETTY, Balaji JAYARAMAN, Thejas KEMPANNA, Toshiaki KIRIHATA, Ramesh RAGHAVAN, Krishnan S. RENGARAJAN, Rajesh R. TUMMURU, Jay M. SHAH, Janakiraman VIRARAGHAVAN
  • Publication number: 20160305635
    Abstract: A bracket for use with a recessed light fixture includes a side wall. A first bendable tab is positioned in the side wall. A second bendable tab is positioned in the side wall, the second tab being offset from the first tab. A retainer extends from the side wall.
    Type: Application
    Filed: April 18, 2016
    Publication date: October 20, 2016
    Inventors: Nancy R. Stathes, Federico Collado, Ramesh Raghavan, Shailesh Naik
  • Patent number: 9460760
    Abstract: A system and method of operating a twin-transistor single bit multi-time programmable memory cell to provide a high gain, sensing scheme for small signals. The memory cell includes a pair of a first transistor and a second transistor providing a differential signal output. The first transistor of the memory cell couples a first circuit leg having a first current source load transistor and the second transistor couples a second circuit leg having a second current source load transistor. A programmed value is represented by a voltage threshold shift in one of the first or second transistors. A feedback circuit receives one of: a first signal or a second signal of the differential signals, and generates, in response, a feedback signal which is simultaneously applied to bias each current source load transistor in each the first and second circuit legs to amplify a voltage differential between the differential signal outputs.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: October 4, 2016
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Balaji Jayaraman, Thejas Kempanna, Toshiaki Kirihata, Ramesh Raghavan, Krishnan S. Rengarajan, Rajesh R. Tummuru
  • Publication number: 20160217832
    Abstract: A system and method of operating a twin-transistor single bit multi-time programmable memory cell to provide a high gain, sensing scheme for small signals. The memory cell includes a pair of a first transistor and a second transistor providing a differential signal output. The first transistor of the memory cell couples a first circuit leg having a first current source load transistor and the second transistor couples a second circuit leg having a second current source load transistor. A programmed value is represented by a voltage threshold shift in one of the first or second transistors. A feedback circuit receives one of: a first signal or a second signal of the differential signals, and generates, in response, a feedback signal which is simultaneously applied to bias each current source load transistor in each the first and second circuit legs to amplify a voltage differential between the differential signal outputs.
    Type: Application
    Filed: January 23, 2015
    Publication date: July 28, 2016
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Balaji Jayaraman, Thejas Kempanna, Toshiaki Kirihata, Ramesh Raghavan, Krishnan S. Rengarajan, Rajesh R. Tummuru
  • Publication number: 20150276184
    Abstract: A light fixture assembly includes a light source, a reflector and a shield. The light source emits a beam of light. The reflector directs at least a portion of the beam of light emitted from the light source. The shield is positioned in the reflector to intercept at least a portion of the light emitted from the light source.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 1, 2015
    Inventors: Nancy R. Stathes, Federico Collado, JR., Ramesh Raghavan