Patents by Inventor Yasuhiro Sudo

Yasuhiro Sudo 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).

  • Publication number: 20230341893
    Abstract: A real-time clock module includes: a timing circuit configured to measure a time to generate time data; a selection circuit configured to select at least one of a plurality of types of event data as target event data to be stored and select, as target time data to be stored, data corresponding to at least a part of time digits of the time data in response to generation of an event; and a memory circuit configured to store the target time data and the target event data.
    Type: Application
    Filed: April 25, 2023
    Publication date: October 26, 2023
    Inventor: Yasuhiro SUDO
  • Publication number: 20230341894
    Abstract: A real-time clock module coupled to a memory device includes: a timing circuit configured to measure a time to generate time data; a first interface circuit configured to function as a master interface for the memory device; a power supply circuit configured to supply a power supply voltage to the memory device; and a control circuit configured to write, to the memory device, target time data corresponding to at least a part of time digits of the time data via the first interface circuit after the supply of the power supply voltage to the memory device is started, and to stop the supply of the power supply voltage after the target time data is written.
    Type: Application
    Filed: April 25, 2023
    Publication date: October 26, 2023
    Inventor: Yasuhiro SUDO
  • Patent number: 11567529
    Abstract: A real-time clock device includes a resonator, a clock signal generation circuit, a time-counting circuit, a terminal, and a time-to-digital conversion circuit. The clock signal generation circuit outputs a time-counting clock signal based on an oscillation clock signal. The time-counting circuit generates time-counting data based on the time-counting clock signal. An external signal is input to the terminal. The time-to-digital conversion circuit measures a time difference between a transition timing of a first signal based on the external signal and a transition timing of a second signal based on the oscillation clock signal or the time-counting clock signal with a resolution higher than a time-counting resolution of the time-counting circuit, and obtains time difference information corresponding to the time difference.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: January 31, 2023
    Inventors: Hideo Haneda, Yasuhiro Sudo, Akio Tsutsumi
  • Patent number: 11499679
    Abstract: A tank state estimating method of estimating a state in a tank at a predetermined point in time on a sailing course of an LNG carrier is provided. The LNG carrier carrying LNG stored in the tank as a cargo.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: November 15, 2022
    Assignee: NIPPON YUSEN KABUSHIKI KAISHA
    Inventors: Hideyuki Ando, Yasuhiro Sudo, Tatsuya Kojima, Fumitaka Kimura
  • Patent number: 11467198
    Abstract: A frequency measurement circuit includes a first counter that counts a pulse number of a reference clock signal and generates first count data, a second counter that counts a pulse number of a measurement target clock signal and generates second count data, a time-to-digital conversion circuit that generates first time difference data indicating a time difference between a first timing at which the first counter starts counting of the pulse number and a second timing at which the second counter starts counting of the pulse number, and second time difference data indicating a time difference between a third timing at which the first counter ends counting of the pulse number and a fourth timing at which the second counter ends counting of the pulse number, and a calculation circuit that performs calculation based on the second count data, the first time difference data, and the second time difference data and generates frequency data indicating a frequency of the measurement target clock signal.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: October 11, 2022
    Inventors: Tomoaki Takahashi, Hideo Haneda, Yasuhiro Sudo
  • Patent number: 11397446
    Abstract: A circuit device is used in an electronic device including a receiver, a control circuit that performs processing on reception data received by the receiver using a clock signal, a transmitter that transmits transmission data generated by performing processing based on the reception data by the control circuit. The circuit device includes a time-to-digital conversion circuit that measures a time difference between a transition timing of a start signal based on the reception data and a transition timing of a stop signal based on the transmission data or the clock signal, and an output interface that outputs, to the control circuit, a measurement result of the time difference of the time-to-digital conversion circuit.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: July 26, 2022
    Inventors: Hisahiro Ito, Hideo Haneda, Yasuhiro Sudo, Akio Tsutsumi
  • Patent number: 11320792
    Abstract: Provided is a circuit device including: a clock signal generation circuit generating a plurality of multi-phase clock signals; a time-to-digital conversion circuit performing a count operation based on an i-th clock signal that corresponds to a multi-phase clock signal, to obtain a count value that corresponds to a time difference between transition timings of a first signal and a second signal, to obtain a first digital value that corresponds to a time difference between transition timings of the first signal and a j-th clock signal that corresponds to a multi-phase clock signal, and to obtain a second digital value that corresponds to a time difference between transition timings of the second signal and a k-th clock signal that corresponds to a multi-phase clock signal; and a processing circuit obtaining a digital value that corresponds to the time difference based on the count value, the first digital value, and the second digital value.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: May 3, 2022
    Inventors: Yasuhiro Sudo, Akio Tsutsumi
  • Publication number: 20220004220
    Abstract: A circuit device is used in an electronic device including a receiver, a control circuit that performs processing on reception data received by the receiver using a clock signal, a transmitter that transmits transmission data generated by performing processing based on the reception data by the control circuit. The circuit device includes a time-to-digital conversion circuit that measures a time difference between a transition timing of a start signal based on the reception data and a transition timing of a stop signal based on the transmission data or the clock signal, and an output interface that outputs, to the control circuit, a measurement result of the time difference of the time-to-digital conversion circuit.
    Type: Application
    Filed: December 18, 2020
    Publication date: January 6, 2022
    Inventors: Hisahiro ITO, Hideo HANEDA, Yasuhiro SUDO, Akio TSUTSUMI
  • Patent number: 11201588
    Abstract: An oscillator includes a resonator, a clock signal generation circuit, a clock signal output terminal, an external signal input terminal, an interface circuit, and an interface terminal. The clock signal generation circuit oscillates the resonator to generate a clock signal. The clock signal output terminal outputs the clock signal. An external signal is input to the external signal input terminal. The interface circuit outputs time difference information obtained by measuring a time difference between a transition timing of a first signal based on the external signal input from the external signal input terminal and a transition timing of a second signal based on the clock signal, or frequency information obtained by measuring a frequency of a first clock signal, which is one of the clock signal and the external clock signal, based on a frequency of a second clock signal, which is the other of the clock signal and the external clock signal. The interface terminal is coupled to the interface circuit.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: December 14, 2021
    Inventors: Hideo Haneda, Yasuhiro Sudo, Akio Tsutsumi
  • Publication number: 20210373502
    Abstract: Provided is a circuit device including: a clock signal generation circuit generating a plurality of multi-phase clock signals; a time-to-digital conversion circuit performing a count operation based on an i-th clock signal that corresponds to a multi-phase clock signal, to obtain a count value that corresponds to a time difference between transition timings of a first signal and a second signal, to obtain a first digital value that corresponds to a time difference between transition timings of the first signal and a j-th clock signal that corresponds to a multi-phase clock signal, and to obtain a second digital value that corresponds to a time difference between transition timings of the second signal and a k-th clock signal that corresponds to a multi-phase clock signal; and a processing circuit obtaining a digital value that corresponds to the time difference based on the count value, the first digital value, and the second digital value.
    Type: Application
    Filed: August 6, 2020
    Publication date: December 2, 2021
    Inventors: Yasuhiro Sudo, Akio Tsutsumi
  • Patent number: 11115028
    Abstract: Provided is an oscillator including: a first resonator; a second resonator; a first oscillation circuit generating a first oscillation signal by oscillating the first resonator; a second oscillation circuit generating a second oscillation signal that has frequency-temperature characteristics different from frequency-temperature characteristics of the first oscillation signal by oscillating the second resonator; a clock signal generation circuit generating a clock signal with a frequency that is temperature compensated by temperature compensation data; a storage unit storing information on a learned model that is machine-learned to output data corresponding to the temperature compensation data with respect to input data; and a processing circuit obtaining the temperature compensation data by performing processing based on the information on the learned model with respect to the input data based on the first oscillation signal and the second oscillation signal.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: September 7, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Yasuhiro Sudo
  • Patent number: 11070212
    Abstract: Provided is an oscillator including: a first resonator; a second resonator; a first oscillation circuit generating a first oscillation signal by oscillating the first resonator; a second oscillation circuit generating a second oscillation signal that has frequency-temperature characteristics different from frequency-temperature characteristics of the first oscillation signal by oscillating the second resonator; a clock signal generation circuit generating a clock signal with a frequency that is temperature compensated by temperature compensation data; and a processing circuit performing time digital conversion processing based on the first oscillation signal and the second oscillation signal, and obtaining the temperature compensation data based on measurement data of the time digital conversion processing.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: July 20, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Yasuhiro Sudo
  • Publication number: 20210200260
    Abstract: A real-time clock device includes a resonator, a clock signal generation circuit, a time-counting circuit, a terminal, and a time-to-digital conversion circuit. The clock signal generation circuit outputs a time-counting clock signal based on an oscillation clock signal. The time-counting circuit generates time-counting data based on the time-counting clock signal. An external signal is input to the terminal. The time-to-digital conversion circuit measures a time difference between a transition timing of a first signal based on the external signal and a transition timing of a second signal based on the oscillation clock signal or the time-counting clock signal with a resolution higher than a time-counting resolution of the time-counting circuit, and obtains time difference information corresponding to the time difference.
    Type: Application
    Filed: December 23, 2020
    Publication date: July 1, 2021
    Inventors: Hideo HANEDA, Yasuhiro SUDO, Akio TSUTSUMI
  • Publication number: 20210194428
    Abstract: An oscillator includes a resonator, a clock signal generation circuit, a clock signal output terminal, an external signal input terminal, an interface circuit, and an interface terminal. The clock signal generation circuit oscillates the resonator to generate a clock signal. The clock signal output terminal outputs the clock signal. An external signal is input to the external signal input terminal. The interface circuit outputs time difference information obtained by measuring a time difference between a transition timing of a first signal based on the external signal input from the external signal input terminal and a transition timing of a second signal based on the clock signal, or frequency information obtained by measuring a frequency of a first clock signal, which is one of the clock signal and the external clock signal, based on a frequency of a second clock signal, which is the other of the clock signal and the external clock signal. The interface terminal is coupled to the interface circuit.
    Type: Application
    Filed: December 17, 2020
    Publication date: June 24, 2021
    Inventors: Hideo HANEDA, Yasuhiro SUDO, Akio TSUTSUMI
  • Patent number: 11038509
    Abstract: A circuit device includes an oscillation circuit and a processing circuit. The oscillation circuit includes a variable capacitance circuit configured by a capacitor array and oscillates at an oscillation frequency corresponding to the capacitance value of the variable capacitance circuit. First temperature data and second temperature data subsequent to the first temperature data are input to the processing circuit as temperature data. In the period between the start of the capacitance control based on the first temperature data and the start of the capacitance control based on the second temperature data, the processing circuit switches the first capacitance control data corresponding to the first temperature data and the second capacitance control data different from the first capacitance control data in a time-division manner to be output to the variable capacitance circuit.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: June 15, 2021
    Inventors: Tomoaki Takahashi, Yasuhiro Sudo
  • Patent number: 11005478
    Abstract: An integrated circuit device includes first and second temperature sensors, an A/D conversion circuit that performs A/D conversion on first and second temperature detection voltages from the first and second temperature sensors and outputs first and second temperature detection data, a connection terminal that is electrically connected to a temperature detection target device of the first and second temperature sensors, and a digital signal processing circuit that performs digital calculation based on the first and second temperature detection data and performs a temperature compensation process of correcting temperature characteristics of the temperature detection target device.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: May 11, 2021
    Inventors: Hideo Haneda, Yasuhiro Sudo
  • Patent number: 10998907
    Abstract: An integrated circuit device includes a digital signal processing circuit that generates frequency control data by performing a temperature compensation process by a neural network calculation process based on temperature detection data and an amount of change in time of the temperature detection data, and an oscillation signal generation circuit that generates an oscillation signal of a frequency set by the frequency control data using a resonator.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: May 4, 2021
    Assignee: Seiko Epson Corporation
    Inventors: Yasuhiro Sudo, Hideo Haneda
  • Publication number: 20210063451
    Abstract: A frequency measurement circuit includes a first counter that counts a pulse number of a reference clock signal and generates first count data, a second counter that counts a pulse number of a measurement target clock signal and generates second count data, a time-to-digital conversion circuit that generates first time difference data indicating a time difference between a first timing at which the first counter starts counting of the pulse number and a second timing at which the second counter starts counting of the pulse number, and second time difference data indicating a time difference between a third timing at which the first counter ends counting of the pulse number and a fourth timing at which the second counter ends counting of the pulse number, and a calculation circuit that performs calculation based on the second count data, the first time difference data, and the second time difference data and generates frequency data indicating a frequency of the measurement target clock signal.
    Type: Application
    Filed: August 26, 2020
    Publication date: March 4, 2021
    Inventors: Tomoaki TAKAHASHI, Hideo HANEDA, Yasuhiro SUDO
  • Publication number: 20210058088
    Abstract: A circuit device includes an oscillation circuit and a processing circuit. The oscillation circuit includes a variable capacitance circuit configured by a capacitor array and oscillates at an oscillation frequency corresponding to the capacitance value of the variable capacitance circuit. First temperature data and second temperature data subsequent to the first temperature data are input to the processing circuit as temperature data. In the period between the start of the capacitance control based on the first temperature data and the start of the capacitance control based on the second temperature data, the processing circuit switches the first capacitance control data corresponding to the first temperature data and the second capacitance control data different from the first capacitance control data in a time-division manner to be output to the variable capacitance circuit.
    Type: Application
    Filed: August 21, 2020
    Publication date: February 25, 2021
    Inventors: Tomoaki TAKAHASHI, Yasuhiro SUDO
  • 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