Patents Examined by Richard Tan
  • Patent number: 10903654
    Abstract: A method and apparatus for minimizing circulating currents on a power distribution line. In one embodiment, the method comprises dynamically adjusting a turns ratio of a tap changing transformer, the tap changing transformer coupled to a power grid distribution line that is also coupled to a plurality of microgrid branches wherein at least one microgrid branch of the plurality of microgrid branches comprises a distributed energy resource (DER), based on a reactive power measured locally to the tap changing transformer, to minimize current circulating on the power grid distribution line.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: January 26, 2021
    Assignee: Enphase Energy, Inc.
    Inventor: Donald Richard Zimmanck
  • Patent number: 10897224
    Abstract: An oscillator includes a first container that includes a first base substrate and a first lid and that has a first internal space, a second container that is fixed to the first base substrate in the first internal space and that includes a second base substrate and a second lid and that has a second internal space, a resonator element that is disposed on the lower surface side of the second base substrate in the second internal space, a temperature sensor that is disposed on the upper surface side of the second base substrate, a first circuit element that includes an oscillation circuit and a second circuit element that is fixed to the first base substrate in the first internal space and that includes a frequency control circuit that controls a frequency of the oscillation signal output by the oscillation circuit. The second container and the second circuit element are arranged side by side in plan view.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: January 19, 2021
    Assignee: Seiko Epson Corporation
    Inventors: Ryuta Nishizawa, Shinya Aoki
  • Patent number: 10897384
    Abstract: A digital demodulator for use with a Highway Addressable Remote Transducer (HART) modem is provided. Analog input signals are digitized according to a sampling clock rate to produce a discrete time signal. Filtering and edge detection allow determinations of “mark” or “space” data in a demodulated signal in conjunction with analyzing a detected signal period, a cycle period, count histories and/or an on/off signal period.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: January 19, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Michael Douglas Snedeker, Hugo Cheung
  • Patent number: 10897226
    Abstract: An oscillator includes a first container that includes a first base substrate and a first lid bonded to the first base substrate and has a first internal space, a second container that is accommodated in the first internal space and fixed to the first base substrate, a resonator element that is accommodated in the second container, a temperature sensor that is accommodated in the second container, a first circuit element that is accommodated in the second container and includes an oscillation circuit oscillating the resonator element and generating an oscillation signal on which temperature compensation is performed based on a detected temperature of the temperature sensor, and a second circuit element that is fixed to the first base substrate and includes a frequency control circuit that controls a frequency of the oscillation signal, in which the second container and the second circuit element are arranged side by side in plan view.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: January 19, 2021
    Assignee: Seiko Epson Corporation
    Inventors: Ryuta Nishizawa, Shinya Aoki
  • Patent number: 10892711
    Abstract: An oscillator includes a first resonator element, a first circuit element configured to oscillate the first resonator element to generate a first oscillation signal, a first package which is configured to house the first resonator element and the first circuit element, and has a mounting surface and a mounting terminal disposed on the mounting surface, a second resonator element an oscillation frequency of which is controlled based on the first oscillation signal, and a second package which houses the second resonator element and is provided with the second package mounted on the mounting surface of the first package.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: January 12, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Norio Nomura
  • Patent number: 10892622
    Abstract: One embodiment provides a method, including: receiving information, from at least one energy subsystem, indicating a desired amount of photovoltaic output to be produced by at least one photovoltaic panel, wherein the at least one photovoltaic panel comprises at least one photovoltaic harvester; ascertaining the amount of photovoltaic output being produced by the at least one photovoltaic panel; determining the difference between the desired amount of photovoltaic output and the amount of photovoltaic output being produced; identifying the maximum possible amount of photovoltaic output that could be produced by the at least one photovoltaic panel; and optimizing, using an optimization technique, the amount of photovoltaic output produced by the at least one photovoltaic harvester by adjusting at least one characteristic of the at least one photovoltaic harvester, wherein the adjusting comprises: if the difference is less than the maximum possible amount, adjusting at least one characteristic of the at least o
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: January 12, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ranjini B. Guruprasad, Jagabondhu Hazra, Shivkumar Kalyanaraman, Sukanya Randhawa
  • Patent number: 10886878
    Abstract: Modulation circuitry is configured to generate a phase modulated signal having an output frequency that corresponds to a local oscillator (LO) signal divided by N.5. A phase locked loop (PLL) is configured to generate an LO signal having a frequency that is N.5 times the output frequency. Pulse circuitry configured to generate, based at least on a value of N, an edge signal including a pulse aligned with a positive edge of the LO signal and a pulse aligned with a negative edge of the LO signal. The edge signal is used to generate the phase modulated signal.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: January 5, 2021
    Assignee: Intel IP Corporation
    Inventors: Georgios Yorgos Palaskas, Paolo Madoglio, Dirk Friedrich
  • Patent number: 10879844
    Abstract: An oscillation device includes an oscillator and a logic circuit. The oscillator generates an output oscillation signal. The logic circuit controls the oscillator according to the output oscillation signal, such that the output oscillation signal includes two different oscillation periods. The oscillation device may be used as a temperature-to-frequency converter without any bandgap reference circuit.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: December 29, 2020
    Assignee: MEDIATEK INC.
    Inventors: Wei-Lin Chen, Kuan-Ta Chen
  • Patent number: 10868553
    Abstract: An atomic oscillator includes an atom cell that accommodates an alkali metal atom, a heating device that heats the atom cell, a container that includes a first magnetism shielding member that is disposed between the heating device and the atom cell and a second magnetism shielding member that is disposed on the side opposite the atom cell with respect to the heating device to shield the atom cell from magnetism produced by the heating device, and a thermally insulating member disposed between the first member and the second member.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: December 15, 2020
    Inventors: Yasunori Onishi, Takahiro Kan, Mutsuhiko Ota
  • Patent number: 10868494
    Abstract: A device includes a sensor and an oscillator. The sensor provides a temperature-sensitive voltage. The oscillator includes a digital delay cell and an adjustment device. The adjustment device, based on the temperature-sensitive voltage, adjusts a delay of the digital delay cell, wherein the digital delay cell produces, based on the adjusted delay, a signal at an oscillation frequency.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: December 15, 2020
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Ping-Han Tsai, Chih-Sheng Hou, Po-Yu Chen, Nan-Hsin Tseng
  • Patent number: 10848102
    Abstract: Provided is a crystal oscillator, including: a crystal; an oscillating circuit including a first oscillating transistor and a second oscillating transistor, where the first oscillating transistor and the second oscillating transistor are configured to provide transconductance for starting oscillation and maintaining oscillation of the crystal; a first driving circuit configured to generate a stable reference current; and a second driving circuit, configured to supply an operating voltage to the oscillating circuit and make an operating current of the first oscillating transistor and the second oscillating transistor be a stable current according to the reference current, where the operating voltage is used to control the first oscillating transistor and the second oscillating transistor to operate in a sub-threshold region.
    Type: Grant
    Filed: May 27, 2019
    Date of Patent: November 24, 2020
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventor: Mengwen Zhang
  • Patent number: 10848159
    Abstract: A drive circuit is configured to drive an oscillator to vibrate the oscillator that outputs a monitor signal according to a physical quantity. The drive circuit includes a drive signal generating unit that generates a drive signal having a drive frequency, a phase difference detector that detects a phase difference between the monitor signal and the drive signal, a frequency controller that controls the drive frequency based on the phase difference, automatic gain control (AGC) unit that controls an amplitude of the drive signal according to an amplitude of the monitor signal, and an output unit that outputs the drive signal having the controlled amplitude to the oscillator. This drive circuit can stably drive and vibrate the oscillator.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: November 24, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hideyuki Murakami, Takeshi Uemura
  • Patent number: 10840853
    Abstract: An oscillator includes a resonator and a first loop circuit. The first loop circuit includes an amplifier and a first coupler. That first loop circuit is electrically coupled to the resonator. The oscillator is configured to produce negative feedback for the amplifier in a cavity mode relative to short circuit terminations or open circuit terminations of a cavity modelling the oscillator at frequencies offset from a carrier frequency. The oscillator has a loss of less than 4.00 dB for a bidirectional trip through the cavity at the frequencies offset from the carrier frequency.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: November 17, 2020
    Assignee: Keysight Technologies, Inc.
    Inventor: Dean Nicholson
  • Patent number: 10840926
    Abstract: An example oscillator device comprises (i) an oscillation circuit arranged for generating and outputting an oscillation signal and comprising an active circuit to ensure oscillation is maintained, (ii) a voltage-to-current conversion replica circuit of the active circuit arranged for receiving the oscillation signal and for outputting a current proportional to the oscillation signal, (iii) biasing means arranged to generate a constant bias current to activate the oscillation circuit, and (iv) subtraction means for subtracting the current proportional to the oscillation signal from the bias current, thereby obtaining a resulting current which can be used for adapting the oscillation signal's amplitude.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: November 17, 2020
    Assignee: Stichting IMEC Nederland
    Inventors: XiaoYan Wang, Kia Salimi
  • Patent number: 10826430
    Abstract: An oscillating circuit includes an input terminal and an output terminal, to both of which an oscillator is coupled, a DC cut capacitor having one terminal of two terminals that is coupled to the input terminal, an inverter having an input side coupled to the other terminal of the DC cut capacitor and an output side coupled to the output terminal, a first feedback resistor coupled in parallel to the inverter, a second feedback resistor coupled in parallel to the DC cut capacitor and the inverter, and a switch coupled in parallel to the DC cut capacitor.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: November 3, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Masaya Ninomiya
  • Patent number: 10819278
    Abstract: A differential Colpitts oscillator circuit is described which has center-tapped inductors which are cross-coupled with gates of second transistors of first and second transistor pairs which can reduce the minimum power supply voltage and the bias voltage for the circuit. In addition, a capacitive ladder can be implemented which also has the potential benefit of increased tuning range.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: October 27, 2020
    Assignee: STICHTING IMEC NEDERLAND
    Inventors: Paul Mateman, Cui Zhou
  • Patent number: 10819277
    Abstract: A differential Colpitts oscillator circuit is described which provides a larger tuning range, has better phase noise and uses less power than conventional differential Colpitts oscillator circuits. The circuit is characterized by a capacitive ladder in which only variable capacitor is used for tuning the circuit. In some embodiments, a variable capacitor can be used for fine tuning.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: October 27, 2020
    Assignee: STITCHING IMEC NEDERLAND
    Inventors: Cui Zhou, Paul Mateman
  • Patent number: 10819280
    Abstract: A crystal oscillator including a feedback circuit, and a reference clock generating circuit including the crystal oscillator. The crystal oscillator is configured to generate an oscillating signal based on a natural frequency of a crystal. The crystal oscillator may include: a current generating circuit connected to a first node having a first voltage and a second node having a second voltage, and configured to output a first current to the second node; a feedback circuit connected to the generating circuit via the first and second nodes and configured to adjust a level of the second voltage by controlling a level of the first voltage; and a crystal circuit connected to the second node and configured to generate the oscillating signal based on the second voltage.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: October 27, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-hyuk Jang, Shin-woong Kim, Young-min Kim, Jae-young Kim, Chul-ho Kim, Sang-wook Han
  • Patent number: 10812093
    Abstract: A frequency signal generation apparatus includes an atom cell including a first part including gaseous alkali metal atoms and a second part including liquid alkali metal atoms. A first temperature controller controls the first part's temperature. A second temperature controller controls the second part's temperature to be lower than that of the first part. First and second temperature detectors respectively detect the first and second parts' temperatures. The first temperature controller and the second temperature detector are thermally connected. The second temperature controller and the first temperature detector are thermally connected. The phase of a temperature control loop of the first part including the first temperature controller and the first temperature detector and the phase of a temperature control loop of the second part including the second temperature controller and the second temperature detector are different.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: October 20, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Naoki Ishihara, Koji Chindo
  • Patent number: 10812092
    Abstract: A frequency signal generation device includes a substrate, a light source that is disposed on a surface of the substrate, and an atom cell that is disposed on the surface of the substrate. The atom cell contains gaseous alkali metal atoms and includes a first portion through which light emitted from the light source passes, a second portion housing a liquid alkali metal atom, and a third portion which connects the first portion to the second portion. A marker is provided that indicates a direction in which the liquid alkali metal atoms move to the third portion by gravity when the surface is vertically oriented.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: October 20, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Yoshiyuki Maki