Patents by Inventor Rajeev Kumar Dokania

Rajeev Kumar Dokania 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: 11711083
    Abstract: An adder with first and second majority gates. For a 1-bit adder, output from a 3-input majority gate is inverted and input two times to a 5-input majority gate. Other inputs to the 5-input majority gate are same as those of the 3-input majority gate. The output of the 5-input majority gate is a sum while the output of the 3-input majority gate is the carry. Multiple 1-bit adders are concatenated to form an N-bit adder. The input signals are driven to first terminals of non-ferroelectric capacitors while the second terminals are coupled to form a majority node. Majority function of the input signals occurs on this node. The majority node is then coupled to a first terminal of a non-linear polar capacitor. The second terminal of the capacitor provides the output of the logic gate. A reset mechanism initializes the non-linear polar capacitor before addition function is performed.
    Type: Grant
    Filed: March 8, 2022
    Date of Patent: July 25, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Sasikanth Manipatruni, Yuan-Sheng Fang, Robert Menezes, Rajeev Kumar Dokania, Guarav Thareja, Ramamoorthy Ramesh, Amrita Mathuriya
  • Patent number: 11705905
    Abstract: An apparatus and configuring scheme where a ferroelectric capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the ferroelectric capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and pull-down devices are turned on in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: July 18, 2023
    Assignee: Kepler Computing, Inc.
    Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Sasikanth Manipatruni
  • Patent number: 11705906
    Abstract: A new class of logic gates are presented that use non-linear polar material. The logic gates include multi-input majority gates. Input signals in the form of digital signals are driven to non-linear input capacitors on their respective first terminals. The second terminals of the non-linear input capacitors are coupled a summing node which provides a majority function of the inputs. In the multi-input majority or minority gates, the non-linear charge response from the non-linear input capacitors results in output voltages close to or at rail-to-rail voltage levels. In some examples, the nodes of the non-linear input capacitors are conditioned once in a while to preserve function of the multi-input majority gates.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: July 18, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Rajeev Kumar Dokania, Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Robert Menezes, Ramamoorthy Ramesh, Sasikanth Manipatruni
  • Publication number: 20230223936
    Abstract: Asynchronous circuit elements are described. Asynchronous circuit elements include a consensus element (c-element), completion tree, and validity tree. The c-element is implemented using adjustable threshold based multi-input capacitive circuitries. The completion tree comprises a plurality of c-elements organized in a tree formation. The validity tree comprises OR gates followed by c-elements. The multi-input capacitive circuitries include capacitive structures that may comprise linear dielectric, paraelectric dielectric, or ferroelectric dielectric. The capacitors can be planar or non-planar. The capacitors may be stacked vertically to reduce footprint of the various asynchronous circuitries.
    Type: Application
    Filed: January 14, 2022
    Publication date: July 13, 2023
    Applicant: Kepler Computing Inc.
    Inventors: Amrita Mathuriya, Nabil Imam, Ikenna Odinaka, Rafael Rios, Rajeev Kumar Dokania, Sasikanth Manipatruni
  • Patent number: 11699699
    Abstract: An apparatus and configuring scheme where a ferroelectric capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the ferroelectric capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and pull-down devices are turned on in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: July 11, 2023
    Assignee: Kepler Computing, Inc.
    Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Debo Olaosebikan, Sasikanth Manipatruni
  • Patent number: 11696450
    Abstract: To compensate switching of a dielectric component of a non-linear polar material based capacitor, an explicit dielectric capacitor is added to a memory bit-cell and controlled by a signal opposite to the signal driven on a plate-line.
    Type: Grant
    Filed: November 1, 2021
    Date of Patent: July 4, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Rajeev Kumar Dokania, Noriyuki Sato, Tanay Gosavi, Amrita Mathuriya, Sasikanth Manipatruni
  • Patent number: 11694737
    Abstract: A memory is provided which comprises a capacitor including non-linear polar material. The capacitor may have a first terminal coupled to a node (e.g., a storage node) and a second terminal coupled to a plate-line. The capacitors can be a planar capacitor or non-planar capacitor (also known as pillar capacitor). The memory includes a transistor coupled to the node and a bit-line, wherein the transistor is controllable by a word-line, wherein the plate-line is parallel to the bit-line. The memory includes a refresh circuitry to refresh charge on the capacitor periodically or at a predetermined time. The refresh circuit can utilize one or more of the endurance mechanisms. When the plate-line is parallel to the bit-line, a specific read and write scheme may be used to reduce the disturb voltage for unselected bit-cells. A different scheme is used when the plate-line is parallel to the word-line.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: July 4, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Rajeev Kumar Dokania, Amrita Mathuriya, Sasikanth Manipatruni
  • Patent number: 11694940
    Abstract: A packaging technology to improve performance of an AI processing system resulting in an ultra-high bandwidth system. An IC package is provided which comprises: a substrate; a first die on the substrate, and a second die stacked over the first die. The first die can be a first logic die (e.g., a compute chip, CPU, GPU, etc.) while the second die can be a compute chiplet comprising ferroelectric or paraelectric logic. Both dies can include ferroelectric or paraelectric logic. The ferroelectric/paraelectric logic may include AND gates, OR gates, complex gates, majority, minority, and/or threshold gates, sequential logic, etc. The IC package can be in a 3D or 2.5D configuration that implements logic-on-logic stacking configuration. The 3D or 2.5D packaging configurations have chips or chiplets designed to have time distributed or spatially distributed processing. The logic of chips or chiplets is segregated so that one chip in a 3D or 2.5D stacking arrangement is hot at a time.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: July 4, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Amrita Mathuriya, Christopher B. Wilkerson, Rajeev Kumar Dokania, Debo Olaosebikan, Sasikanth Manipatruni
  • Patent number: 11696451
    Abstract: To compensate switching of a dielectric component of a non-linear polar material based capacitor, an explicit dielectric capacitor is added to a memory bit-cell and controlled by a signal opposite to the signal driven on a plate-line.
    Type: Grant
    Filed: November 1, 2021
    Date of Patent: July 4, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Rajeev Kumar Dokania, Noriyuki Sato, Tanay Gosavi, Amrita Mathuriya, Sasikanth Manipatruni
  • Patent number: 11688733
    Abstract: An apparatus and configuring scheme where a paraelectric capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the paraelectric capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and/or pull-down devices are turned on or off in a sequence, and inputs to the capacitors are set to condition the voltage on node nl. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: June 27, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Sasikanth Manipatruni
  • Publication number: 20230187476
    Abstract: A device includes, in a first region, a first conductive interconnect, an electrode structure on the first conductive interconnect, where the electrode structure includes a first conductive hydrogen barrier layer and a first conductive fill material. A memory device including a ferroelectric material or a paraelectric material is on the electrode structure. A second dielectric includes an amorphous, greater than 90% film density hydrogen barrier material laterally surrounds the memory device. A via electrode including a second conductive hydrogen barrier material is on at least a portion of the memory device. A second region includes a conductive interconnect structure embedded within a less than 90% film density material.
    Type: Application
    Filed: December 14, 2021
    Publication date: June 15, 2023
    Applicant: Kepler Computing Inc.
    Inventors: Noriyuki Sato, Niloy Mukherjee, Mauricio Manfrini, Tanay Gosavi, Rajeev Kumar Dokania, Somilkumar J. Rathi, Amrita Mathuriya, Sasikanth Manipatruni
  • Patent number: 11670352
    Abstract: Endurance mechanisms are introduced for memories such as non-volatile memories for broad usage including caches, last-level cache(s), embedded memory, embedded cache, scratchpads, main memory, and storage devices. Here, non-volatile memories (NVMs) include magnetic random-access memory (MRAM), resistive RAM (ReRAM), ferroelectric RAM (FeRAM), phase-change memory (PCM), etc. In some cases, features of endurance mechanisms (e.g., randomizing mechanisms) are applicable to volatile memories such as static random-access memory (SRAM), and dynamic random-access memory (DRAM). The endurance mechanisms include a wear leveling scheme that uses index rotation, outlier compensation to handle weak bits, and random swap injection to mitigate wear out attacks.
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: June 6, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Christopher B. Wilkerson, Sasikanth Manipatruni, Rajeev Kumar Dokania, Amrita Mathuriya
  • Patent number: 11664370
    Abstract: An apparatus and configuring scheme where a paraelectric capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the paraelectric capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and/or pull-down devices are turned on or off in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: May 30, 2023
    Assignee: Kepler Corpating inc.
    Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Sasikanth Manipatruni
  • Patent number: 11664371
    Abstract: An apparatus and configuring scheme where a paraelectric capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the paraelectric capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and/or pull-down devices are turned on or off in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: May 30, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Debo Olaosebikan, Sasikanth Manipatruni
  • Patent number: 11664060
    Abstract: A memory is provided which comprises a capacitor including non-linear polar material. The capacitor may have a first terminal coupled to a node (e.g., a storage node) and a second terminal coupled to a plate-line. The capacitors can be a planar capacitor or non-planar capacitor (also known as pillar capacitor). The memory includes a transistor coupled to the node and a bit-line, wherein the transistor is controllable by a word-line, wherein the plate-line is parallel to the bit-line. The memory includes a refresh circuitry to refresh charge on the capacitor periodically or at a predetermined time. The refresh circuit can utilize one or more of the endurance mechanisms. When the plate-line is parallel to the bit-line, a specific read and write scheme may be used to reduce the disturb voltage for unselected bit-cells. A different scheme is used when the plate-line is parallel to the word-line.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: May 30, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Rajeev Kumar Dokania, Amrita Mathuriya, Sasikanth Manipatruni
  • Patent number: 11658664
    Abstract: Asynchronous circuits implemented using threshold gate(s) and/or majority gate(s) (or minority gate(s)) are described. The new class of asynchronous circuits can operate at lower power supply levels (e.g., less than 1V on advanced technology nodes) because stack of devices between a supply node and ground are significantly reduced compared to traditional asynchronous circuits. The asynchronous circuits here result in area reduction (e.g., 3× reduction compared to traditional asynchronous circuits) and provide higher throughput/mm2 (e.g., 2× higher throughput compared to traditional asynchronous circuits). The threshold gate(s), majority/minority gate(s) can be implemented using capacitive input circuits. The capacitors can have linear dielectric or non-linear polar material as dielectric.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: May 23, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Sasikanth Manipatruni, Nabil Imam, Ikenna Odinaka, Rafael Rios, Rajeev Kumar Dokania, Amrita Mathuriya
  • Patent number: 11652487
    Abstract: Asynchronous circuits implemented using threshold gate(s) and/or majority gate(s) (or minority gate(s)) are described. The new class of asynchronous circuits can operate at lower power supply levels (e.g., less than 1V on advanced technology nodes) because stack of devices between a supply node and ground are significantly reduced compared to traditional asynchronous circuits. The asynchronous circuits here result in area reduction (e.g., 3× reduction compared to traditional asynchronous circuits) and provide higher throughput/mm2 (e.g., 2× higher throughput compared to traditional asynchronous circuits). The threshold gate(s), majority/minority gate(s) can be implemented using capacitive input circuits. The capacitors can have linear dielectric or non-linear polar material as dielectric.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: May 16, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Sasikanth Manipatruni, Nabil Imam, Ikenna Odinaka, Rafael Rios, Rajeev Kumar Dokania, Amrita Mathuriya
  • Patent number: 11652482
    Abstract: Asynchronous circuits implemented using threshold gate(s) and/or majority gate(s) (or minority gate(s)) are described. The new class of asynchronous circuits can operate at lower power supply levels (e.g., less than 1V on advanced technology nodes) because stack of devices between a supply node and ground are significantly reduced compared to traditional asynchronous circuits. The asynchronous circuits here result in area reduction (e.g., 3× reduction compared to traditional asynchronous circuits) and provide higher throughput/mm2 (e.g., 2× higher throughput compared to traditional asynchronous circuits). The threshold gate(s), majority/minority gate(s) can be implemented using capacitive input circuits. The capacitors can have linear dielectric or non-linear polar material as dielectric.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: May 16, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Sasikanth Manipatruni, Nabil Imam, Ikenna Odinaka, Rafael Rios, Rajeev Kumar Dokania, Amrita Mathuriya
  • Patent number: 11646071
    Abstract: A memory is provided which comprises a capacitor including non-linear polar material. The capacitor may have a first terminal coupled to a node (e.g., a storage node) and a second terminal coupled to a plate-line. The capacitors can be a planar capacitor or non-planar capacitor (also known as pillar capacitor). The memory includes a transistor coupled to the node and a bit-line, wherein the transistor is controllable by a word-line, wherein the plate-line is parallel to the bit-line. The memory includes a refresh circuitry to refresh charge on the capacitor periodically or at a predetermined time. The refresh circuit can utilize one or more of the endurance mechanisms. When the plate-line is parallel to the bit-line, a specific read and write scheme may be used to reduce the disturb voltage for unselected bit-cells. A different scheme is used when the plate-line is parallel to the word-line.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: May 9, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Rajeev Kumar Dokania, Amrita Mathuriya, Sasikanth Manipatruni
  • Patent number: 11641747
    Abstract: Approaches for integrating FE memory arrays into a processor, and the resulting structures are described. Simultaneous integrations of regions with ferroelectric (FE) cells and regions with standard interconnects are also described. FE cells include FE capacitors that include a FE stack of layers, which is encapsulated with a protection material. The protection material protects the FE stack of layers as structures for regular logic are fabricated in the same die.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: May 2, 2023
    Assignee: Kepler Computing Inc.
    Inventors: Gaurav Thareja, Sasikanth Manipatruni, Rajeev Kumar Dokania, Ramamoorthy Ramesh, Amrita Mathuriya