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).

  • Publication number: 20250079343
    Abstract: Embodiments of the disclosure provide a structure and related method for a gate over semiconductor regions that are not aligned. Structures according to the disclosure include a first semiconductor region extending from a first widthwise end to a second widthwise end within a substrate. A second semiconductor region is adjacent the first semiconductor region and extends from a first widthwise end to a second widthwise end within the substrate. The second widthwise end of the second semiconductor region is non-aligned with the second widthwise end of the first semiconductor region. A gate structure is over the substrate and extends widthwise over the first semiconductor region and the second semiconductor region.
    Type: Application
    Filed: August 31, 2023
    Publication date: March 6, 2025
    Inventors: David Charles Pritchard, Ramesh Raghavan, Thirunavukkarasu Ranganathan, Rajesh Reddy Tummuru, Benoit Francois Claude Ramadout, Luca Pirro
  • Patent number: 12176053
    Abstract: The present disclosure relates to integrated circuits, and more particularly, to a wordline system architecture supporting an erase operation and current-voltage (I-V) characterization and methods of manufacture and operation. In particular, the present disclosure relates to a structure including: a twin cell circuit which is connected to a wordline of a memory array; a sourceline driver which is connected to a sourceline of the memory array for providing a cell level current-voltage (I-V) access of the twin cell circuit; and an integrated analog multiplexor which is connected to the twin cell circuit.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: December 24, 2024
    Assignee: GLOBALFOUNDRIES U.S. Inc.
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Ming Yin
  • Publication number: 20240304258
    Abstract: Embodiments of the disclosure provide a memory assembly with body biasing and related methods to operate such a structure. A structure according to the disclosure includes a memory cell having a pair of memory transistors each having a gate coupled to a word line. A pair of diode-connected transistors each have a source/drain (S/D) terminal coupled to a respective S/D terminal of one of the pair of memory transistors through a multiplexer. A bias voltage source is coupled to each body of the pair of diode-connected transistors or each body of the pair of memory transistors. The bias voltage source applies a different bias voltage to each body of the pair of diode-connected transistors or each body of the pair of memory transistors.
    Type: Application
    Filed: March 6, 2023
    Publication date: September 12, 2024
    Inventors: Ramesh Raghavan, Chandrahasa Reddy Dinnipati, Philipp Bernhard Mosch
  • Publication number: 20240302032
    Abstract: A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and/or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications.
    Type: Application
    Filed: May 15, 2024
    Publication date: September 12, 2024
    Inventors: Ramesh Raghavan, Aymen Chami, Eric Clohosey, Stephen Andrew Entrekin, Xiaoming Dai
  • Patent number: 12051465
    Abstract: Disclosed is a sense circuit with first and second branches connected to first and second inputs of an amplifier. The first branch includes series-connected first transistors between a voltage rail and a data line and a first node between two first transistors and connected to the first input. First transistors on either side of the first node receive corresponding gate bias voltages. The second branch includes series-connected second transistors between the voltage rail and a reference device and a second node between two second transistors and connected to the second input. One first transistor and one second transistor share a common control signal. The first and second branches independently and concurrently generate data and reference voltages on the first and second nodes and the difference between them is sensed by the amplifier. Also disclosed are a non-volatile memory structure incorporating the sense circuit and a method.
    Type: Grant
    Filed: July 14, 2022
    Date of Patent: July 30, 2024
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Chandrahasa Reddy Dinnipati, Bipul C. Paul, Ramesh Raghavan
  • Patent number: 11988370
    Abstract: A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and/or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications.
    Type: Grant
    Filed: December 7, 2022
    Date of Patent: May 21, 2024
    Assignee: MAXLITE, INC
    Inventors: Ramesh Raghavan, Aymen Chami, Eric Clohosey, Stephen Andrew Entrekin, Xiaoming Dai
  • Patent number: 11881241
    Abstract: A structure includes an array of nonvolatile memory cells, wordlines and bitlines connected to the nonvolatile memory cells, sense amplifiers connected to the nonvolatile memory cells, and reference cells connected to the sense amplifiers. Each of the reference cells has a transistor connected to a variable resistor, one of the wordlines, a reference bitline separate from the bitlines, and the sense amplifiers.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: January 23, 2024
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Chandrahasa Reddy Dinnipati, Ramesh Raghavan, Bipul C. Paul
  • Patent number: 11881258
    Abstract: Embodiments of the present disclosure provide an apparatus including: a sense amplifier coupled to a memory array and having a set of output terminals, a latch coupled to a first output terminal of the sense amplifier, and a comparator coupled to the latch and a second output terminal of the sense amplifier.
    Type: Grant
    Filed: July 16, 2021
    Date of Patent: January 23, 2024
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Chandrahasa Reddy Dinnipati
  • Publication number: 20240021243
    Abstract: Disclosed is a sense circuit with first and second branches connected to first and second inputs of an amplifier. The first branch includes series-connected first transistors between a voltage rail and a data line and a first node between two first transistors and connected to the first input. First transistors on either side of the first node receive corresponding gate bias voltages. The second branch includes series-connected second transistors between the voltage rail and a reference device and a second node between two second transistors and connected to the second input. One first transistor and one second transistor share a common control signal. The first and second branches independently and concurrently generate data and reference voltages on the first and second nodes and the difference between them is sensed by the amplifier. Also disclosed are a non-volatile memory structure incorporating the sense circuit and a method.
    Type: Application
    Filed: July 14, 2022
    Publication date: January 18, 2024
    Inventors: Chandrahasa Reddy Dinnipati, Bipul C. Paul, Ramesh Raghavan
  • Publication number: 20230317130
    Abstract: A structure includes an array of nonvolatile memory cells, wordlines and bitlines connected to the nonvolatile memory cells, sense amplifiers connected to the nonvolatile memory cells, and reference cells connected to the sense amplifiers. Each of the reference cells has a transistor connected to a variable resistor, one of the wordlines, a reference bitline separate from the bitlines, and the sense amplifiers.
    Type: Application
    Filed: March 31, 2022
    Publication date: October 5, 2023
    Applicant: GlobalFoundries U.S. Inc.
    Inventors: Chandrahasa Reddy Dinnipati, Ramesh Raghavan, Bipul C. Paul
  • Publication number: 20230108737
    Abstract: A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and/or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications.
    Type: Application
    Filed: December 7, 2022
    Publication date: April 6, 2023
    Inventors: Ramesh Raghavan, Aymen Chami, Eric Clohosey, Stephen Andrew Entrekin, Xiaoming Dai
  • Publication number: 20230027165
    Abstract: The present disclosure relates to integrated circuits, and more particularly, to a wordline system architecture supporting an erase operation and current-voltage (I-V) characterization and methods of manufacture and operation. In particular, the present disclosure relates to a structure including: a twin cell circuit which is connected to a wordline of a memory array; a sourceline driver which is connected to a sourceline of the memory array for providing a cell level current-voltage (I-V) access of the twin cell circuit; and an integrated analog multiplexor which is connected to the twin cell circuit.
    Type: Application
    Filed: July 20, 2021
    Publication date: January 26, 2023
    Inventors: Ramesh RAGHAVAN, Balaji JAYARAMAN, Ming YIN
  • Publication number: 20230012844
    Abstract: Embodiments of the present disclosure provide an apparatus including: a sense amplifier coupled to a memory array and having a set of output terminals, a latch coupled to a first output terminal of the sense amplifier, and a comparator coupled to the latch and a second output terminal of the sense amplifier.
    Type: Application
    Filed: July 16, 2021
    Publication date: January 19, 2023
    Inventors: Ramesh Raghavan, Balaji Jayaraman, Chandrahasa Reddy Dinnipati
  • Patent number: 11549675
    Abstract: A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and/or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications.
    Type: Grant
    Filed: December 21, 2021
    Date of Patent: January 10, 2023
    Assignee: MAXLITE, INC.
    Inventors: Ramesh Raghavan, Aymen Chami, Eric Clohosey, Stephen Andrew Entrekin, Xiaoming Dai
  • Patent number: 11329836
    Abstract: A Physically Unclonable Function (PUF) structure includes an array of twin cells divided into two portions: one with first columns and one with second columns. Cells in each first column are connected to a corresponding pair of first bitlines. Cells in each second column are connected to a corresponding pair of second bitlines. A first column decoder is connected to the first bitlines and to a first input of sense amplifier (SA) and a second column decoder is connected to the second bitlines and to a second input of SA. Each read operation to generate a bit is directed to a first cell in a first column and a second cell in a second column and, during the read operation, signals on only one first bitline of the first column containing the first cell and only one second bitline of the second column containing the second cell are compared.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: May 10, 2022
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Toshiaki Kirihata, Balaji Jayaraman, Chandrahasa Reddy Dinnipati, Ramesh Raghavan
  • Publication number: 20220113016
    Abstract: A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and/or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications.
    Type: Application
    Filed: December 21, 2021
    Publication date: April 14, 2022
    Inventors: Ramesh Raghavan, Aymen Chami, Eric Clohosey, Stephen Andrew Entrekin, Xiaoming Dai
  • Publication number: 20220003398
    Abstract: A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and/or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications.
    Type: Application
    Filed: March 29, 2021
    Publication date: January 6, 2022
    Inventors: Ramesh Raghavan, Aymen Chami, Eric Clohosey, Stephen Andrew Entrekin, Xiaoming Dai
  • Patent number: 11215350
    Abstract: A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and/or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: January 4, 2022
    Assignee: MAXLITE, INC.
    Inventors: Ramesh Raghavan, Aymen Chami, Eric Clohosey, Stephen Andrew Entrekin, Xiaoming Dai
  • Patent number: 11125403
    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: September 4, 2020
    Date of Patent: September 21, 2021
    Assignee: MAXLITE, INC.
    Inventors: Ramesh Raghavan, Jun Xiang
  • Patent number: 11056208
    Abstract: The present disclosure relates to a data dependent sense amplifier with symmetric margining. In particular, the present disclosure relates to a structure including a bias generator circuit that is configured to provide symmetric margining between two logic states of a memory circuit.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: July 6, 2021
    Assignee: GLOBALFOUNDRIES U.S. INC.
    Inventors: Balaji Jayaraman, Ramesh Raghavan, Rajesh Reddy Tummuru, Toshiaki Kirihata