Patents Examined by Arnold M. Kinkead
  • Patent number: 11545985
    Abstract: An apparatus includes a digitally controlled oscillator (DCO), which includes an inductor coupled in series with a first capacitor. The DCO further includes a second capacitor coupled in parallel with the series-coupled inductor and first capacitor, a first inverter coupled in parallel with the second capacitor, and a second inverter coupled back-to-back to the first inverter. The DCO further includes a digital-to-analog-converter (DAC) to vary a capacitance of the first capacitor.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: January 3, 2023
    Assignee: Silicon Laboratories Inc.
    Inventor: John M. Khoury
  • Patent number: 11543850
    Abstract: An apparatus and system for a clock buffer. The clock buffer comprises a source follower, and the source follower comprises a voltage source and a resistor.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: January 3, 2023
    Assignee: Acacia Communications, Inc.
    Inventors: Ian Dedic, Gavin Allen, David Enright, Bo Yang, Tarun Gupta
  • Patent number: 11544039
    Abstract: An apparatus includes a ring oscillator, a carry chain circuit, and a detector circuit. The ring oscillator produces a clock signal. The carry chain circuit includes a plurality of stages. Each stage of the plurality of stages includes a plurality of lookup table elements coupled in sequence. The carry chain circuit propagates the clock signal through the plurality of lookup table elements of the plurality of stages. The detector circuit determines, based on a value of the clock signal stored by a final lookup table element of each stage of the plurality of stages, which stage of the plurality stages contains an edge of the clock signal. The detector circuit then outputs a zero if the determined stage is assigned to a first group of the plurality of stages and a one if the determined stage is assigned to a second group of the plurality of stages.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: January 3, 2023
    Assignee: Cisco Technology, Inc.
    Inventors: Michael G. Curcio, Kent H. Hoult, Kevin T. Mortimer
  • Patent number: 11536780
    Abstract: A radio-frequency (RF) to direct current (DC) converter is provided. When a DC electrical current is applied via a DC input port of the converter, the DC electrical current is shunted to ground through a Josephson junction (JJ) of the converter and substantially no DC electrical current flows through a resistor of the converter, and when an RF electrical current is applied via an RF input port of the converter, output trains of SFQ current pulses from a DC to SFQ converter of the RF-to-DC converter with pulse-to-pulse spacing inversely proportional to the RF electrical current frequency cause the JJ to switch at a rate commensurate with an RF frequency of the RF electrical current to generate a steady state voltage across the JJ linearly dependent on the RF frequency.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: December 27, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Matthew Beck
  • Patent number: 11529916
    Abstract: The described techniques relate to a simulation system that multiplexes sensor data from multiple sensors and outputs the multiplexed sensor data in channels corresponding to the multiple sensors to appropriate vehicle systems at an appropriate time based on encoded timestamp data. In examples, a multiplexer may receive sensor datasets associated with different sensors. The multiplexer may encode the different sensor datasets with timestamp data and supplemental data to generate an encoded dataset. The multiplexer may output the encoded dataset to a video output port to transmit the encoded dataset to a demultiplexer. The demultiplexer receives the encoded dataset from the video output port, and separates the encoded dataset into channels corresponding to the sensors from which the sensor data was received. The demultiplexer may output the datasets in the respective channels at a time (or times) indicated in the timestamp data and according to the supplemental data.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: December 20, 2022
    Assignee: Zoox, Inc.
    Inventors: Turhan Karadeniz, Garen Khanoyan, Ryan McMichael
  • Patent number: 11531523
    Abstract: According to one embodiment, a calculating device includes a nonlinear oscillator. The nonlinear oscillator includes a circuit part including a first Josephson junction and a second Josephson junction, and a conductive member including a first terminal. An electrical signal is input to the first terminal. The electrical signal includes a first signal in a first operation. The first signal includes a first frequency component having a first frequency, and a second frequency component having a second frequency. The first frequency is 2 times an oscillation frequency of the nonlinear oscillator. An absolute value of a difference between the first frequency and the second frequency is not more than 0.3 times the first frequency.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: December 20, 2022
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Taro Kanao, Hayato Goto
  • Patent number: 11533056
    Abstract: A circuit is disclosed. The circuit includes a time-to-digital converter (TDC), and an evaluation circuit coupled to the TDC and a phase-locked loop (PLL) external to the circuit.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: December 20, 2022
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Chao Chieh Li, Chia-Chun Liao, Min-Shueh Yuan, Chih-Hsien Chang
  • Patent number: 11533020
    Abstract: A method and system for generating voltage and/or current oscillations in a single magnetic layer is provided. The method comprises applying a direct voltage/current to the layer in a longitudinal direction; and developing a longitudinal voltage between a pair of longitudinal voltage leads and/or a transverse voltage between a pair of transverse voltage leads. The magnetic layer comprises a ferrimagnetic or antiferrimagnetic material having a first and second magnetic sub-lattice, wherein the first sub-lattice is a dominant sub-lattice such that the charge carriers at the Fermi energy originate predominantly from the dominant sub-lattice and the charge carriers at the Fermi energy are spin polarised. In some embodiments, the dominant current carrying sub-lattice may lack inversion symmetry.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: December 20, 2022
    Assignee: THE PROVOST, FELLOWS, FOUNDATION SCHOLARS, AND THE OTHER MEMBERS OF BOARD, OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH, NEAR DUBLIN
    Inventors: Karsten Rode, Plamen Stamenov, John Michael David Coey, Yong Chang Lau, Davide Betto, Arne Brataas, Roberto Troncoso
  • Patent number: 11527991
    Abstract: A voltage controlled oscillator (VCO) circuitry includes a varactor array. The varactor array includes a first varactor unit including a first varactor, a second varactor, and first switch circuitry. The first varactor is connected to a first node and a second node, and the second varactor is connected to the second node and a third node. The second node receives a voltage control signal. The first switch circuitry is electrically coupled to the first node and the third node, and selectively electrically couples a first voltage signal to the first node and the third node based on a first control signal.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: December 13, 2022
    Assignee: Synopsys, Inc.
    Inventors: Akarsh Joshi, Biman Chattopadhyay
  • Patent number: 11515838
    Abstract: A resonant tank includes a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate. The first capacitor, the first inductor, the second capacitor, and the second inductor are connected in a ring configuration, with each capacitor connected between a pair of the inductors and with each inductor connected between a pair of the capacitors. An amplifier circuit is coupled to the resonant tank and configured to amplify a signal in the resonant tank.
    Type: Grant
    Filed: February 5, 2022
    Date of Patent: November 29, 2022
    Assignee: Futurewei Technologies, Inc.
    Inventors: Michael Bushman, James Caldwell
  • Patent number: 11515851
    Abstract: According to an example aspect of the present invention, there is provided a travelling wave parametric amplifier comprising a waveguide transmission line comprising therein at least ten Josephson elements, wherein each of the at least ten Josephson element comprises a loop, with exactly one Josephson junction of first size on one half of the loop and at least two Josephson junctions of a second size on a second half of the loop, the second size being larger than the first size, a flux bias line configured to generate a magnetic flux threading each of the at least one loop, and a set of resistors coupled with the flux bias line.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: November 29, 2022
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Visa Vesterinen, Juha Hassel
  • Patent number: 11509318
    Abstract: The present invention includes a voltage controlled oscillator circuit and a phase-locked loop device. The voltage controlled oscillator circuit comprises: a voltage-to-current conversion module, used for converting a control voltage of a voltage controlled oscillator into a control current as a linear function of the control voltage; and a current controlled oscillation module, used for outputting a low-amplitude oscillation signal based on the control current, so as to reduce power consumption. Further provided in the present invention is a phase-locked loop device comprising the voltage controlled oscillator circuit. According to the voltage controlled oscillator circuit, design parameters of low power consumption and high linearity may be achieved, thereby making a gain Kvco of the voltage controlled oscillator relatively stable, and it may be ensured that the voltage controlled oscillator and the phase-locked loop comprising the same have relatively excellent device performance.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: November 22, 2022
    Assignee: SHANGHAI HUALI MICROELECTRONICS CORPORATION
    Inventors: Yuchun Liu, Zhili Wang
  • Patent number: 11509310
    Abstract: Systems and methods related to charge locking circuits and a control system for qubits are provided. A system for controlling qubit gates includes a first packaged device comprising a quantum device including a plurality of qubit gates, where the quantum device is configured to operate at a cryogenic temperature. The system further includes a second packaged device comprising a control circuit configured to operate at the cryogenic temperature, where the first packaged device is coupled to the second packaged device, and where the control circuit comprises a plurality of charge locking circuits, where each of the plurality of charge locking circuits is coupled to at least one qubit gate of the plurality of qubit gates via an interconnect such that each of the plurality of charge locking circuits is configured to provide a voltage signal to at least one qubit gate.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: November 22, 2022
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Kushal Das, Alireza Moini, David J. Reilly
  • Patent number: 11502645
    Abstract: A transformer based voltage controlled oscillator (VCO) is provided with a primary resonant circuit having a first inductor connected in parallel with a variable first capacitance circuit. A secondary resonant circuit is formed from a second inductor connected in parallel with a variable second capacitance circuit, and also includes a mode control circuit. The mode control circuit controls the direction of current flow through the secondary resonant circuit inductor. The first and second inductors are inductively mutually coupled in either an even mode or an odd mode in response to the mode control circuit. The VCO supplies a first resonant frequency in response to even mode operation, or a second resonant frequency, greater than the first resonant frequency, responsive to odd mode operation. The VCO may include a first electrically tunable varactor shunted across the first capacitance circuit and a second electrically tunable varactor shunted across the second capacitance circuit.
    Type: Grant
    Filed: June 16, 2022
    Date of Patent: November 15, 2022
    Assignee: IQ-Analog Corporation
    Inventor: Devon Thomas
  • Patent number: 11493590
    Abstract: An electronically aligned wideband tracking modulator system is described. The wide band tracking modulator system comprises a waveguide coupled to an antenna. The wide band tracking modulator system also comprises waveguide tuning circuitry configured to convert RF energy from a waveguide of the wideband tracking modulator system into an RF signal that can be processed by the waveguide tuning circuitry. The waveguide tuning circuitry is also configured to shift a phase of the RF signal. The waveguide tuning circuitry is further configured to convert the phase-shifted RF signal into phase-shifted RF energy and return the phase-shifted RF energy to the waveguide to electrically align the wideband tracking modulator system.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: November 8, 2022
    Assignee: The Boeing Company
    Inventors: Daniel Steven Roukos, Christ Tzelepis
  • Patent number: 11496095
    Abstract: An oscillator oscillating a tera hertz wave includes a negative resistive element including a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer, with a first conductor, a second conductor, and a dielectric disposed between the first conductor and the second conductor constitutes a resonator, wherein the negative resistive element is disposed between the first conductor and the second conductor, and a layer with a higher resistivity than the first semiconductor layer or the second semiconductor layer, or an amorphous layer is disposed between the negative resistive element and the dielectric.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: November 8, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshifumi Yoshioka, Yasushi Koyama
  • Patent number: 11496138
    Abstract: An apparatus is disclosed for providing frequency stabilization. The apparatus includes a first supply voltage node, a second supply voltage node, an oscillator circuit coupled to the first supply voltage node, at least one clock buffer coupled to the second supply voltage node and an output of the oscillator circuit, and at least one load circuit. The at least one clock buffer is configured to selectively be in a disabled state or an enabled state to pass the clock signal to at least one client of multiple clients. The at least one load circuit includes an input coupled to the output of the oscillator circuit. The at least one load circuit also includes an output configured to be coupled to a ground. The at least one load circuit is configured to be connected to the first supply voltage node for at least a portion of time.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: November 8, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Shunta Iguchi, Xu Chi, Michael Naone Farias
  • Patent number: 11496093
    Abstract: An oscillator circuit includes an oscillating circuit coupled to a vibrator, and a control circuit that controls the oscillating circuit. The oscillator circuit has a normal operation mode in which the oscillating circuit oscillates in a state where a negative resistance value is a first value, and a start mode in which the oscillator circuit shifts from a state where oscillation is stopped to the normal operation mode. In the start mode, the control circuit controls the negative resistance value to increase from a second value which is smaller than the first value.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: November 8, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yosuke Itasaka, Mitsuaki Sawada, Masataka Nomura
  • Patent number: 11485301
    Abstract: A power source supply circuit supplies an output power source of a battery to a vehicle control apparatus that includes a first instrument control portion that selectively receives a voltage applied to a first power source input portion or a voltage applied to a second power source input portion as an operation voltage and a second instrument control portion that receives a voltage applied to a second power source input portion or a third power source input portion as the operation voltage.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: November 1, 2022
    Assignee: DENSO CORPORATION
    Inventor: Tsuyoshi Shiomi
  • Patent number: 11476804
    Abstract: A clock source includes a comparator having a positive comparator input, a negative comparator input, a proportional to absolute temperature (PTAT) PMOS bias input, a PTAT NMOS bias input, and a comparator output, a resonator element, series and feedback resistors and other passive components coupled between the comparator output and the negative comparator input to generate a signal with approximately constant gain and frequency at the comparator output, and a PTAT bias circuit coupled to the comparator's PTAT PMOS and NMOS bias inputs, and configured to drive the PTAT PMOS bias input and the PTAT NMOS bias input to maintain approximately constant gain and frequency over the operating temperature range of the clock source.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: October 18, 2022
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Gerard T. Quilligan, Terry Hurford