Patents Assigned to Northrop Grumman Systems Corporation
  • Patent number: 10735032
    Abstract: A method includes: generating a trellis; generating one or more predicted symbols using a first non-linear model; computing and saving two or more branch metrics using a priori log-likelihood ratio (LLR) information, a channel observation, and the one or more predicted symbols; if alpha forward recursion has not yet completed, generating alpha forward recursion state metrics using a second non-linear model; if beta backward recursion has not yet completed, generating beta backward recursion state metrics using a third non-linear model; if sigma forward recursion has not yet completed, generating sigma forward recursion state metrics using the branch metrics, the alpha state metrics, and the beta backward recursion state metrics; generating extrinsic information comprising a difference of a posteriori LLR information and the a priori LLR information; computing and feeding back the a priori LLR information; and calculating the a posteriori LLR information.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: August 4, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Daniel N. Liu
  • Patent number: 10732294
    Abstract: A system for generating a frequency hopping Global Positioning System (GPS) system includes: an on-orbit reprogrammable digital waveform generator (ORDWG) configured to generate a GPS signal comprising a resilient frequency-hopping spread spectrum GPS signal that hops at a hop rate between two or more GPS channels, the GPS signal further comprising a legacy direct-sequence spread spectrum signal for at least two of the two or more GPS channels; and a receiver configured to receive the GPS signal, the radio further configured to decode the GPS signal.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: August 4, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Dennis M. Hall, Kiet D. Ngo, Marlon E. Marquez
  • Patent number: 10733166
    Abstract: A mesh engine can generate a nested icosahedral grid that maps data points of a plurality of data sets onto partitions on the nested icosahedral grid. The nested icosahedral grid can include an outer icosahedral grid with a first set of partition and an inner icosahedral grid with a second set of partitions. A first partition of the first set of partitions can be linked to the inner icosahedral grid.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: August 4, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Patricia D. Pratt
  • Patent number: 10734568
    Abstract: A milliohm resistor is fabricated as a Josephson junction device that contains ferromagnetic or antiferromagnetic material of sufficient thickness to render the device entirely resistive between terminals. The device can have a resistance on the order of milliohms and can be consume a much smaller chip footprint than resistors of the same resistance fabricated using conventional resistive materials. Because the device can be fabricated without modification to processes used to fabricate reciprocal quantum logic (RQL) circuitry, it can easily be incorporated in RQL circuits to mitigate flux trapping or to perform other functions where very small resistances are needed. In particular, the device can burn off circulating currents induced by trapped flux without affecting the transmission of SFQ pulses through RQL circuitry.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: August 4, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Eric C. Gingrich
  • Publication number: 20200238420
    Abstract: A welding control system includes a tip sensor to collect welding data from a welding tip. A controller receives the welding data from the tip sensor. The controller compares the welding data to welding parameter thresholds to determine a correction signal based on the welding data. A light generator generates light signal feedback to a welding operator in response to the correction signal.
    Type: Application
    Filed: January 25, 2019
    Publication date: July 30, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: EDWARD F. SAVAGE
  • Publication number: 20200243132
    Abstract: A magnetic Josephson junction (MJJ) device having a ferrimagnetic/ferromagnetic (FIM/FM) exchange-biased bilayer used as the magnetic hard layer improves switching performance by effectively sharpening the hysteresis curve of the device, thereby reducing error rate when the device is used in a Josephson magnetic random access memory (JMRAM) memory cell. Thus, the materials and devices described herein can be used to build a new type of MJJ, termed a ferrimagnetic Josephson junction (FIMJJ), for use in JMRAM, to construct a robust and reliable cryogenic computer memory that can be used for high-speed superconducting computing, e.g., with clock speeds in the microwave frequency range.
    Type: Application
    Filed: January 24, 2019
    Publication date: July 30, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: MELISSA G. LOVING, THOMAS F. AMBROSE
  • Publication number: 20200243133
    Abstract: A bistable device allows supercurrent to flow when functioning in one regime, wherein magnetization directions of different magnetic layers are antiparallel, but restricts supercurrent when switched to function in a resistive regime, wherein the magnetization directions are parallel. In the first regime, the device acts as a Josephson junction, which allows it to be used in superconducting quantum interference devices (SQUIDs) and other circuits in which quantization of magnetic flux in a superconducting loop is desired. In the second, resistive regime, flux quantization is effectively eliminated in loops containing the device, and current is diverted to parallel superconducting components. The bistable device thereby acts as a superconducting switch, useful for a variety of circuit applications, including to steer current for memory or logic circuits, adjust logical circuit functionality at runtime, or to burn off stray flux during cooldown.
    Type: Application
    Filed: January 30, 2019
    Publication date: July 30, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: ERIC C. GINGRICH, RANDALL M. BURNETT, DONALD L. MILLER
  • Publication number: 20200242452
    Abstract: A superconducting neuromorphic pipelined processor core can be used to build neural networks in hardware by providing the functionality of somas, axons, dendrites and synaptic connections. Each instance of the superconducting neuromorphic pipelined processor core can implement a programmable and scalable model of one or more biological neurons in superconducting hardware that is more efficient and biologically suggestive than existing designs. This core can be used to build a wide variety of large-scale neural networks in hardware. The biologically suggestive operation of the neuron core provides additional capabilities to the network that are difficult to implement in software-based neural networks and would be impractical using room-temperature semiconductor electronics. The superconductive electronics that make up the core enable it to perform more operations per second per watt than is possible in comparable state-of-the-art semiconductor-based designs.
    Type: Application
    Filed: January 25, 2019
    Publication date: July 30, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: PAUL KENTON TSCHIRHART
  • Patent number: 10727162
    Abstract: An integrated circuit is provided that comprises a thermal sink layer, a first ground plane associated with a first set of circuits that have a first operational temperature requirement, and a first thermally conductive via that couples the first ground plane to the thermal sink layer. The circuit further comprises a second ground plane associated with a second set of circuits that have a second operational temperature requirement that is higher than the first operational temperature requirement, and a second thermally conductive via that couples the second ground plane to the thermal sink layer, wherein the first thermally conductive via has a greater volume of thermal conductive material than the second thermally conductive via to remove heat from the first set of circuits with less gradient than the second set of circuits.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: July 28, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Patrick Loney, Robert Miles Young, Daniel Robert Queen, Aaron Ashley Hathaway, John X. Przybysz
  • Patent number: 10725431
    Abstract: An atomic clock system includes a magneto-optical trap (MOT) system that traps alkali metal atoms in a cell during a trapping stage of each of sequential coherent population trapping (CPT) cycles. The system also includes an interrogation system that generates an optical difference beam comprising a first optical beam having a first frequency and a second optical beam having a second frequency different from the first frequency. The interrogation system includes a direction controller that periodically alternates a direction of the optical difference beam through the cell during a CPT interrogation stage of each of the sequential clock measurement cycles to drive CPT interrogation of the trapped alkali metal atoms. The system also includes an oscillator system that adjusts a frequency of a local oscillator based on an optical response of the CPT interrogated alkali metal atoms during a state readout stage in each of the sequential clock measurement cycles.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: July 28, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Michael S. Larsen, Thad G. Walker
  • Patent number: 10725463
    Abstract: A method implemented by a computing system identifies anomalies that represents potential off-normal behavior of components on an aircraft based on data from sensors during various modes of operations including in-flight operation of the aircraft. High-frequency sensor outputs monitor performance parameters of respective components. Anomaly criteria is dynamically selected and the high-frequency sensor outputs are compared with the anomaly criteria where the comparison results determine whether potentially off-normal behavior exists. A conditional anomaly tag is inserted in the digitized representations of first high-frequency sensor outputs where the corresponding comparison results indicate potentially off-normal behavior.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: July 28, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Sunil Dixit
  • Patent number: 10727050
    Abstract: A method for wafer-level deposition of a semiconductor layer structure including at least one two-dimensional black phosphorus layer. The method includes providing a wafer substrate and a metal catalyst layer on the substrate. The method includes heating a phosphorus material to generate a P4 flux and heating the P4 flux to generate a P2 flux, where the P2 flux is deposited on the metal catalyst layer using molecular beam epitaxy or chemical vapor deposition. The process of depositing the black phosphorus layer can include adding a dopant or alloy to the P2 flux to modify the band gap of the phosphorus layer. The method includes heating the substrate to a temperature above a temperature that causes red phosphorus to evaporate from the substrate, but does not cause black phosphorus to evaporate from the substrate.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: July 28, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Vincent Gambin, Loan T. Le, Michael D. Lange, Jesse B. Tice
  • Publication number: 20200235987
    Abstract: A system for establishing a mesh network can include one or more computing platforms that initiates execution of a software application for each of a plurality of nodes. Each of the plurality of nodes establishes, by a respective node of the plurality of nodes, a communication link in a mesh network with another node of the plurality of nodes in response to a multicast identification message from the other node. Additionally, each of the plurality of node records, in a token register, a given indication of each node in the plurality of nodes for which a communication link is established and another indication of each node of the plurality of nodes that is identified in one or more multicast identification messages with which a communication link is not established. Further, each of the plurality of nodes broadcasts multicast identification messages on the mesh network.
    Type: Application
    Filed: January 17, 2019
    Publication date: July 23, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: ROBERT C. BRUCKART, DON W. BEBOUT
  • Publication number: 20200234173
    Abstract: Systems and methods are provided for flux control of a qubit. A quantum system includes a microwave transmitter configured to provide a continuous microwave tone, and a qubit configured such that transition energy of the qubit between a ground state of the qubit and a first excited state of the qubit is tunable via an applied flux. The qubit also has an inductive element responsive to the continuous microwave tone to produce a Rabi oscillation within the qubit. A flux source is configured to apply a flux to the qubit to selectively tune the transition energy of the qubit, such that the transition energy of the qubit can be tuned to a frequency of the Rabi oscillation or detuned from the Rabi oscillation.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 23, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: JAMES R. MEDFORD
  • Publication number: 20200235202
    Abstract: A transistor is provided that comprises a source region overlying a base structure, a drain region overlying the base structure, and a block of semiconducting material overlying the base structure and being disposed between the source region and the drain region. The block of semiconducting material comprises a gate controlled region adjacent the source region, and a drain access region disposed between the gate controlled region and the drain region. The drain access region is formed of a plurality of semiconducting material ridges spaced apart from one another by non-channel trench openings, wherein at least a portion of the non-channel trench openings being filled with a doped material to provide a depletion region to improve breakdown voltage of the transistor.
    Type: Application
    Filed: January 21, 2019
    Publication date: July 23, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: JOSEPHINE BEA CHANG, ERIC J. STEWART, KEN ALFRED NAGAMATSU, ROBERT S. HOWELL, SHALINI GUPTA
  • Patent number: 10720572
    Abstract: A memory device includes a memory stack formed on a substrate to program skyrmions within at least one layer of the stack. The skyrmions represent logic states of the memory device. The memory stack further includes a top and bottom electrode to receive electrical current from an external source and to provide the electrical current to the memory stack. A free layer stores a logic state of the skyrmions in response to the electrical current. A Dzyaloshinskii-Moriya (DM) Interaction (DMI) layer in contact with the free layer induces skyrmions in the free layer. A tunnel barrier is interactive with the DMI layer to facilitate detection of the logic state of the skyrmions in response to a read current. At least one fixed magnetic (FM) layer is positioned within the memory stack to facilitate programming of the skyrmions within the free layer in response to the electrical current.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: July 21, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Michael M. Fitelson, Thomas F. Ambrose, Nicholas D. Rizzo
  • Publication number: 20200225039
    Abstract: A control system includes sensor controllers that are each coupled to a respective set of electrodes of a CVG sensor system via respective sensor channels. A first portion of the sensor controllers provides a sinusoidal forcer signal on the respective sensor channel in response to digital clock and feedback signals to provide oscillation of a resonator of the CVG sensor system. A second portion of the sensor controllers monitors a capacitive pickoff voltage associated with the resonator on the respective sensor channel to generate a digital pickoff signal. A gyroscope controller generates the digital feedback signal in response to the digital pickoff signal from the second portion of the sensor controllers to provide the digital feedback signal and the digital clock signal to the first portion of the sensor controllers and determines a rotation about the CVG sensor system based on the digital feedback signal or the digital pickoff signal.
    Type: Application
    Filed: January 16, 2019
    Publication date: July 16, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: JUERGEN KARL PETER FLAMM
  • Patent number: 10715088
    Abstract: A low noise amplifier has integral noise cancellation to provide a low noise figure and operation over a frequency range of 0.5 GHz-50 GHz. An amplifier amplifies an input signal as well as noise present with the amplified signal and amplified noise being out of phase and in phase, respectively, with the corresponding inputs. A feedback circuit that is non-linear with frequency enables a constant amplification. A summation circuit combines amplified signals with the noise being cancelled since two combined noise signals being summed are 180 degrees out of phase to each other. An optional secondary amplification stage provides additional amplification. Preferably, the amplifier, auxiliary amplifier and the summation device utilize CMOS transistors disposed on an SOI substrate with impedance stabilization over the frequency range.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: July 14, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Manouchehr Ghanevati, Timothy R. LaRocca
  • Patent number: 10714841
    Abstract: An antenna system includes: an antenna, the antenna configured to combine the feed elements to form a high gain element beam (HGEB), the system further configured to combine the HGEBs to form a large coverage beam; and a feed array configured to transfer a signal to the antenna, the feed array being defocused from a focal plane of the antenna by a defocus distance, the feed array comprising a number N of feed elements.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: July 14, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Sudhakar K. Rao
  • Publication number: 20200220064
    Abstract: Test structures and methods for superconducting bump bond electrical characterization are used to verify the superconductivity of bump bonds that electrically connect two superconducting integrated circuit chips fabricated using a flip-chip process, and can also ascertain the self-inductance of bump bond(s) between chips. The structures and methods leverage a behavioral property of superconducting DC SQUIDs to modulate a critical current upon injection of magnetic flux in the SQUID loop, which behavior is not present when the SQUID is not superconducting, by including bump bond(s) within the loop, which loop is split among chips. The sensitivity of the bump bond superconductivity verification is therefore effectively perfect, independent of any multi-milliohm noise floor that may exist in measurement equipment.
    Type: Application
    Filed: January 7, 2019
    Publication date: July 9, 2020
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: AURELIUS L. GRANINGER, JOEL D. STRAND, MICAH JOHN ATMAN STOUTIMORE, ZACHARY KYLE KEANE, JEFFREY DAVID HARTMAN, JUSTIN C. HACKLEY