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: 10908558Abstract: 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: GrantFiled: September 22, 2017Date of Patent: February 2, 2021Inventors: Takashi Kurashina, Katsuhiko Maki
-
Patent number: 10884041Abstract: 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: GrantFiled: September 26, 2017Date of Patent: January 5, 2021Inventors: Katsuhiko Maki, Hideo Haneda, Takashi Kurashina, Akio Tsutsumi, Yasuhiro Sudo
-
Patent number: 10666195Abstract: 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: GrantFiled: June 28, 2018Date of Patent: May 26, 2020Assignee: Seiko Epson CorporationInventors: Akio Tsutsumi, Takashi Kurashina, Fumikazu Komatsu
-
Patent number: 10594295Abstract: 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: GrantFiled: June 28, 2018Date of Patent: March 17, 2020Assignee: Seiko Epson CorporationInventors: Akio Tsutsumi, Takashi Kurashina, Fumikazu Komatsu
-
Patent number: 10489732Abstract: 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: GrantFiled: September 3, 2012Date of Patent: November 26, 2019Assignee: FUJI CORPORATIONInventors: Jun Kitayama, Takashi Kurashina
-
Patent number: 10451419Abstract: 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: GrantFiled: November 1, 2016Date of Patent: October 22, 2019Assignee: Seiko Epson CorporationInventors: Takashi Kurashina, Katsuhiko Maki, Hideo Haneda
-
Patent number: 10305496Abstract: 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: GrantFiled: September 26, 2017Date of Patent: May 28, 2019Assignee: Seiko Epson CorporationInventors: Yasuhiro Sudo, Katsuhiko Maki, Hideo Haneda, Akio Tsutsumi, Takashi Kurashina
-
Patent number: 10299418Abstract: 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: GrantFiled: February 22, 2013Date of Patent: May 21, 2019Assignee: FUJI CORPORATIONInventors: Hiroaki Muratsuchi, Takashi Kurashina
-
Patent number: 10268164Abstract: 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: GrantFiled: February 21, 2018Date of Patent: April 23, 2019Assignee: Seiko Epson CorporationInventors: Akio Tsutsumi, Takashi Kurashina, Katsuhiko Maki
-
Patent number: 10222759Abstract: 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: GrantFiled: September 26, 2017Date of Patent: March 5, 2019Assignee: Seiko Epson CorporationInventors: Katsuhiko Maki, Hideo Haneda, Takashi Kurashina, Akio Tsutsumi, Yasuhiro Sudo
-
Publication number: 20190007027Abstract: 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: ApplicationFiled: June 28, 2018Publication date: January 3, 2019Inventors: Akio TSUTSUMI, Takashi KURASHINA, Fumikazu KOMATSU
-
Publication number: 20190006989Abstract: 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: ApplicationFiled: June 28, 2018Publication date: January 3, 2019Inventors: Akio TSUTSUMI, Takashi KURASHINA, Fumikazu KOMATSU
-
Publication number: 20180239307Abstract: 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: ApplicationFiled: February 21, 2018Publication date: August 23, 2018Inventors: Akio TSUTSUMI, Takashi KURASHINA, Katsuhiko MAKI
-
Publication number: 20180091156Abstract: 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: ApplicationFiled: September 26, 2017Publication date: March 29, 2018Inventors: Katsuhiko MAKI, Hideo HANEDA, Takashi KURASHINA, Akio TSUTSUMI, Yasuhiro SUDO
-
Publication number: 20180091158Abstract: 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: ApplicationFiled: September 26, 2017Publication date: March 29, 2018Inventors: Yasuhiro SUDO, Katsuhiko MAKI, Hideo HANEDA, Akio TSUTSUMI, Takashi KURASHINA
-
Publication number: 20180088160Abstract: 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: ApplicationFiled: September 26, 2017Publication date: March 29, 2018Inventors: Katsuhiko MAKI, Hideo HANEDA, Takashi KURASHINA, Akio TSUTSUMI, Yasuhiro SUDO
-
Publication number: 20180088536Abstract: 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: ApplicationFiled: September 22, 2017Publication date: March 29, 2018Inventors: Takashi KURASHINA, Katsuhiko MAKI
-
Patent number: 9801317Abstract: 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: GrantFiled: March 14, 2013Date of Patent: October 24, 2017Assignee: FUJI MACHINE MFG. CO., LTD.Inventors: Takashi Kurashina, Hiroaki Muratsuchi
-
Publication number: 20170122739Abstract: 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: ApplicationFiled: November 1, 2016Publication date: May 4, 2017Inventors: Takashi KURASHINA, Katsuhiko MAKI, Hideo HANEDA
-
Patent number: 9602117Abstract: 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: GrantFiled: March 18, 2014Date of Patent: March 21, 2017Assignee: Seiko Epson CorporationInventors: Katsuhiko Maki, Takashi Kurashina