Patents by Inventor Takashi Kurashina

Takashi Kurashina 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: 10908558
    Abstract: A circuit device includes a time-to-digital conversion circuit, to which a first clock signal generated using a first resonator, and having a first clock frequency, and a second clock signal generated using a second resonator, and having a second clock frequency different from the first clock frequency are input, and which converts time into a digital value using the first and second clock signals, and a PLL circuit adapted to perform phase synchronization between the first and second clock signals.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: February 2, 2021
    Inventors: Takashi Kurashina, Katsuhiko Maki
  • Patent number: 10884041
    Abstract: A physical quantity measurement apparatus includes a first resonator, a second oscillator, and an integrated circuit device. The integrated circuit device includes a first oscillation circuit that causes the first resonator to oscillate, and thus generate a first clock signal having a first clock frequency, a second oscillation circuit that causes the second oscillator to oscillate, and thus generate a second clock signal having a second clock frequency which is different from the first clock frequency, and a measurement unit that is provided with a time-to-digital conversion circuit which converts time into a digital value by using the first clock signal and the second clock signal.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: January 5, 2021
    Inventors: Katsuhiko Maki, Hideo Haneda, Takashi Kurashina, Akio Tsutsumi, Yasuhiro Sudo
  • Patent number: 10666195
    Abstract: A resonator device includes first and second resonators and an integrated circuit device. The integrated circuit device includes a first oscillation circuit configured to oscillate the first resonator, a second oscillation circuit configured to oscillate the second resonator, and a processing circuit configured to perform processing by using frequency difference information or frequency comparison information between a first clock signal generated by oscillating the first resonator and a second clock signal generated by oscillating the second resonator. The first resonator is supported on the integrated circuit device by a first support portion. The second resonator is supported on the integrated circuit device by a second support portion.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 26, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Akio Tsutsumi, Takashi Kurashina, Fumikazu Komatsu
  • Patent number: 10594295
    Abstract: A resonator device includes first and second resonators and an integrated circuit. The integrated circuit includes first and second oscillation circuits that oscillate first and second resonators, first and second terminals connected to the first oscillation circuit, and third and fourth terminals connected to the second oscillation circuit. The first terminal of the integrated circuit and one electrode of the first resonator are connected to each other via a bump. The third terminal and one electrode of the second resonator are connected to each other via a bump. In a plan view, at least a portion of the first resonator overlaps the first oscillation circuit and at least a portion of the second resonator overlaps the second oscillation circuit.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: March 17, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Akio Tsutsumi, Takashi Kurashina, Fumikazu Komatsu
  • Patent number: 10489732
    Abstract: A production line management system that registers and manages distribution data for each of a plurality of production lines, and thus, manages work data in a unitary manner. The management system being constructed to manage production in a plurality of the production lines with a small amount of data and to simplify a system configuration. In particular, the distribution data is created by an identifier added to work data.
    Type: Grant
    Filed: September 3, 2012
    Date of Patent: November 26, 2019
    Assignee: FUJI CORPORATION
    Inventors: Jun Kitayama, Takashi Kurashina
  • Patent number: 10451419
    Abstract: A detection apparatus includes a first sensor for detecting rotation information of a wheel of a moving object; a second sensor for detecting angular velocity information of a rotation in a yaw axis of the wheel or angular information as yaw rotation information; and a storage unit for storing the rotation information and the yaw rotation information to be output to a processing unit for obtaining positional information of the moving object based on the rotation information and the yaw rotation information.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: October 22, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Kurashina, Katsuhiko Maki, Hideo Haneda
  • Patent number: 10305496
    Abstract: A circuit device includes: a time-to-digital conversion circuit to which a first clock signal with a first clock frequency and a second clock signal with a second clock frequency different from the first clock frequency are input and that converts a time difference in transition timings of first and second signals into a digital value; and a synchronization circuit that synchronizes phases of the first and second clock signals. The time-to-digital conversion circuit calculates the digital value corresponding to the time difference by transitioning a signal level of the first signal based on the first clock signal after a phase synchronization timing of the first and second clock signals and compares the phase of the second clock signal to a phase of the second signal having a signal level is transitioned to correspond to the first signal.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: May 28, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Yasuhiro Sudo, Katsuhiko Maki, Hideo Haneda, Akio Tsutsumi, Takashi Kurashina
  • Patent number: 10299418
    Abstract: A component mounting system that efficiently determines a component as a bulk component to be mounted on a bulk feeder through a simulation, and a bulk component determining method. The component mounting system includes a printed-circuit-board conveyance section that includes conveyance lanes and which convey a plurality of different types of printed circuit boards, a component supply section, a mounting head, a bulk feeder, and a bulk component determining section that performs a simulation in which operation times when the components supplied from the component supply section are moved on the printed circuit boards on the conveyance lanes are calculated for all the components and determines the bulk component to be mounted on the bulk feeder based on the calculated operation times.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: May 21, 2019
    Assignee: FUJI CORPORATION
    Inventors: Hiroaki Muratsuchi, Takashi Kurashina
  • Patent number: 10268164
    Abstract: A circuit device includes a first PLL circuit to which a first clock signal having a first clock frequency generated using a first resonator and a reference clock signal are input, and which performs phase synchronization between the first clock signal and the reference clock signal, a second PLL circuit to which a second clock signal generated using a second resonator and having a second clock frequency different from the first clock frequency and the reference clock signal are input, and which performs phase synchronization between the second clock signal and the reference clock signal, and a time-to-digital conversion circuit adapted to convert time into a digital value using the first clock signal and the second clock signal.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: April 23, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Akio Tsutsumi, Takashi Kurashina, Katsuhiko Maki
  • Patent number: 10222759
    Abstract: An integrated circuit device includes: a first oscillation circuit that oscillates a first resonator to generate a first clock signal with a first clock frequency; a second oscillation circuit that oscillates a second oscillation element to generate a second clock signal with a second clock frequency that is different from the first clock frequency; and a time-to-digital conversion circuit that converts a time into a digital value using the first and second clock signals.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: March 5, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Katsuhiko Maki, Hideo Haneda, Takashi Kurashina, Akio Tsutsumi, Yasuhiro Sudo
  • Publication number: 20190007027
    Abstract: A resonator device includes first and second resonators and an integrated circuit. The integrated circuit includes first and second oscillation circuits that oscillate first and second resonators, first and second terminals connected to the first oscillation circuit, and third and fourth terminals connected to the second oscillation circuit. The first terminal of the integrated circuit and one electrode of the first resonator are connected to each other via a bump. The third terminal and one electrode of the second resonator are connected to each other via a bump. In a plan view, at least a portion of the first resonator overlaps the first oscillation circuit and at least a portion of the second resonator overlaps the second oscillation circuit.
    Type: Application
    Filed: June 28, 2018
    Publication date: January 3, 2019
    Inventors: Akio TSUTSUMI, Takashi KURASHINA, Fumikazu KOMATSU
  • Publication number: 20190006989
    Abstract: A resonator device includes first and second resonators and an integrated circuit device. The integrated circuit device includes a first oscillation circuit configured to oscillate the first resonator, a second oscillation circuit configured to oscillate the second resonator, and a processing circuit configured to perform processing by using frequency difference information or frequency comparison information between a first clock signal generated by oscillating the first resonator and a second clock signal generated by oscillating the second resonator. The first resonator is supported on the integrated circuit device by a first support portion. The second resonator is supported on the integrated circuit device by a second support portion.
    Type: Application
    Filed: June 28, 2018
    Publication date: January 3, 2019
    Inventors: Akio TSUTSUMI, Takashi KURASHINA, Fumikazu KOMATSU
  • Publication number: 20180239307
    Abstract: A circuit device includes a first PLL circuit to which a first clock signal having a first clock frequency generated using a first resonator and a reference clock signal are input, and which performs phase synchronization between the first clock signal and the reference clock signal, a second PLL circuit to which a second clock signal generated using a second resonator and having a second clock frequency different from the first clock frequency and the reference clock signal are input, and which performs phase synchronization between the second clock signal and the reference clock signal, and a time-to-digital conversion circuit adapted to convert time into a digital value using the first clock signal and the second clock signal.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 23, 2018
    Inventors: Akio TSUTSUMI, Takashi KURASHINA, Katsuhiko MAKI
  • Publication number: 20180091156
    Abstract: An integrated circuit device includes: a first oscillation circuit that oscillates a first resonator to generate a first clock signal with a first clock frequency; a second oscillation circuit that oscillates a second oscillation element to generate a second clock signal with a second clock frequency that is different from the first clock frequency; and a time-to-digital conversion circuit that converts a time into a digital value using the first and second clock signals.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Inventors: Katsuhiko MAKI, Hideo HANEDA, Takashi KURASHINA, Akio TSUTSUMI, Yasuhiro SUDO
  • Publication number: 20180091158
    Abstract: A circuit device includes: a time-to-digital conversion circuit to which a first clock signal with a first clock frequency and a second clock signal with a second clock frequency different from the first clock frequency are input and that converts a time difference in transition timings of first and second signals into a digital value; and a synchronization circuit that synchronizes phases of the first and second clock signals. The time-to-digital conversion circuit calculates the digital value corresponding to the time difference by transitioning a signal level of the first signal based on the first clock signal after a phase synchronization timing of the first and second clock signals and compares the phase of the second clock signal to a phase of the second signal having a signal level is transitioned to correspond to the first signal.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Inventors: Yasuhiro SUDO, Katsuhiko MAKI, Hideo HANEDA, Akio TSUTSUMI, Takashi KURASHINA
  • Publication number: 20180088160
    Abstract: A physical quantity measurement apparatus includes a first resonator, a second oscillator, and an integrated circuit device. The integrated circuit device includes a first oscillation circuit that causes the first resonator to oscillate, and thus generate a first clock signal having a first clock frequency, a second oscillation circuit that causes the second oscillator to oscillate, and thus generate a second clock signal having a second clock frequency which is different from the first clock frequency, and a measurement unit that is provided with a time-to-digital conversion circuit which converts time into a digital value by using the first clock signal and the second clock signal.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Inventors: Katsuhiko MAKI, Hideo HANEDA, Takashi KURASHINA, Akio TSUTSUMI, Yasuhiro SUDO
  • Publication number: 20180088536
    Abstract: A circuit device includes a time-to-digital conversion circuit, to which a first clock signal generated using a first resonator, and having a first clock frequency, and a second clock signal generated using a second resonator, and having a second clock frequency different from the first clock frequency are input, and which converts time into a digital value using the first and second clock signals, and a PLL circuit adapted to perform phase synchronization between the first and second clock signals.
    Type: Application
    Filed: September 22, 2017
    Publication date: March 29, 2018
    Inventors: Takashi KURASHINA, Katsuhiko MAKI
  • Patent number: 9801317
    Abstract: A production management system is configured so as to make it possible to produce component mounting boards to the same specifications in two lanes of a component mounting machine using one set of NC data by arranging feeders of two feeder set bases in the same manner and setting the mounting order of the components to the circuit boards in the two lanes to be the same in a same-direction production mode in which circuit boards are conveyed in the same front/back direction in the two lanes. In addition, the arrangement of the feeders and the mounting order of the components are optimized so that the difference in production times in the two lanes in the same-direction production mode is minimized.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 24, 2017
    Assignee: FUJI MACHINE MFG. CO., LTD.
    Inventors: Takashi Kurashina, Hiroaki Muratsuchi
  • Publication number: 20170122739
    Abstract: A detection apparatus includes a first sensor for detecting rotation information of a wheel of a moving object; a second sensor for detecting angular velocity information of a rotation in a yaw axis of the wheel or angular information as yaw rotation information; and a storage unit for storing the rotation information and the yaw rotation information to be output to a processing unit for obtaining positional information of the moving object based on the rotation information and the yaw rotation information.
    Type: Application
    Filed: November 1, 2016
    Publication date: May 4, 2017
    Inventors: Takashi KURASHINA, Katsuhiko MAKI, Hideo HANEDA
  • Patent number: 9602117
    Abstract: A detection device includes a driving circuit and a detection circuit. The detection circuit includes first and second electric charge-voltage conversion circuits to which first and second detection signals are input, first and second gain adjustment amplifiers that amplify output signals of the circuits, a switching mixer that has first and second input nodes to which the output signals of the first and second gain adjustment amplifiers are input, and performs differential synchronous detection thereon on the basis of a synchronization signal from the driving circuit, so as to output first and second output signals to first and second output nodes, first and second filters that receive the first and second output signals from the first and second output nodes of the switching mixer, and an A/D conversion circuit that receives output signals from the first and second filters so as to perform differential A/D conversion thereon.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: March 21, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Katsuhiko Maki, Takashi Kurashina