Patents by Inventor Yuichi Toriumi
Yuichi Toriumi 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).
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Patent number: 11881816Abstract: An oscillator includes: a resonator; an oscillation circuit configured to generate an oscillation signal by the resonator; a clock output terminal; an output circuit configured to output a clock signal to an external processing device via the clock output terminal; a first terminal; and an interface circuit configured to execute communication with the processing device by a data signal. In the communication, the output circuit outputs the clock signal to the processing device that is a master for the communication, and the interface circuit that is a slave for the communication receives, via the first terminal, the data signal that is transmitted from the processing device and synchronized with the clock signal, or transmits, via the first terminal, the data signal to the processing apparatus in synchronization with the clock signal.Type: GrantFiled: July 28, 2022Date of Patent: January 23, 2024Assignee: SEIKO EPSON CORPORATIONInventor: Yuichi Toriumi
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Patent number: 11863123Abstract: A circuit device includes an oscillation circuit that generates an oscillation signal using a resonator, a temperature detection circuit that outputs temperature detection data, a temperature compensation circuit, and a temperature detection rate control circuit. The temperature compensation circuit performs temperature compensation on an oscillation frequency of the oscillation signal based on the temperature detection data. The temperature detection rate control circuit controls a temperature detection rate at which the temperature detection circuit executes temperature detection. At this time, the temperature detection rate control circuit controls the temperature detection rate based on a variation in the temperature detection data.Type: GrantFiled: July 26, 2022Date of Patent: January 2, 2024Inventors: Hideo Haneda, Yuichi Toriumi
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Patent number: 11855646Abstract: A circuit device includes an oscillation circuit configured to generate an oscillation signal using a resonator, a temperature sensor circuit configured to output temperature detection data, a temperature compensation circuit configured to perform, based on the temperature detection data, temperature compensation on an oscillation frequency of the oscillation signal, a memory configured to store correction data for correcting the temperature detection data to obtain a temperature, and an interface circuit configured to output the temperature detection data and the correction data.Type: GrantFiled: July 28, 2022Date of Patent: December 26, 2023Assignee: SEIKO EPSON CORPORATIONInventor: Yuichi Toriumi
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Patent number: 11791770Abstract: A circuit device includes a first terminal, a first oscillation circuit oscillating a resonator and generating a first voltage for automatic gain control for controlling amplitude of a signal output from the resonator, a digital signal generation circuit generating a digital signal corresponding to the first voltage, and a first interface circuit outputting the digital signal to the first terminal.Type: GrantFiled: July 13, 2022Date of Patent: October 17, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Teppei Higuchi, Jun Uehara, Yuichi Toriumi, Hiroshi Kiya
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Patent number: 11652443Abstract: A circuit device includes an oscillation circuit and a processing circuit that generates capacitance control data. The oscillation circuit includes a variable capacitance circuit whose capacitance value is variably controlled based on the capacitance control data, and an oscillation frequency thereof is controlled based on the capacitance value of the variable capacitance circuit. The variable capacitance circuit includes a capacitor array. The capacitor array includes a plurality of capacitors each having a binary-weighted capacitance value, and a plurality of switches that are on-off controlled based on the capacitance control data. The processing circuit outputs the capacitance control data, which is subjected to dithering, so as to switch the capacitance value of the variable capacitance circuit between a first capacitance value and a second capacitance value in a time division manner.Type: GrantFiled: January 28, 2022Date of Patent: May 16, 2023Inventors: Yuichi Toriumi, Hideo Haneda, Teppei Higuchi, Atsushi Tanaka
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Publication number: 20230035498Abstract: A circuit device includes an oscillation circuit that generates an oscillation signal using a resonator, a temperature detection circuit that outputs temperature detection data, a temperature compensation circuit, and a temperature detection rate control circuit. The temperature compensation circuit performs temperature compensation on an oscillation frequency of the oscillation signal based on the temperature detection data. The temperature detection rate control circuit controls a temperature detection rate at which the temperature detection circuit executes temperature detection. At this time, the temperature detection rate control circuit controls the temperature detection rate based on a variation in the temperature detection data.Type: ApplicationFiled: July 26, 2022Publication date: February 2, 2023Inventors: Hideo HANEDA, Yuichi TORIUMI
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Publication number: 20230034239Abstract: A circuit device includes an oscillation circuit configured to generate an oscillation signal using a resonator, a temperature sensor circuit configured to output temperature detection data, a temperature compensation circuit configured to perform, based on the temperature detection data, temperature compensation on an oscillation frequency of the oscillation signal, a memory configured to store correction data for correcting the temperature detection data to obtain a temperature, and an interface circuit configured to output the temperature detection data and the correction data.Type: ApplicationFiled: July 28, 2022Publication date: February 2, 2023Inventor: Yuichi Toriumi
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Publication number: 20230032617Abstract: An oscillator includes: a resonator; an oscillation circuit configured to generate an oscillation signal by the resonator; a clock output terminal; an output circuit configured to output a clock signal to an external processing device via the clock output terminal; a first terminal; and an interface circuit configured to execute communication with the processing device by a data signal. In the communication, the output circuit outputs the clock signal to the processing device that is a master for the communication, and the interface circuit that is a slave for the communication receives, via the first terminal, the data signal that is transmitted from the processing device and synchronized with the clock signal, or transmits, via the first terminal, the data signal to the processing apparatus in synchronization with the clock signal.Type: ApplicationFiled: July 28, 2022Publication date: February 2, 2023Inventor: Yuichi Toriumi
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Publication number: 20230020823Abstract: A circuit device includes a first terminal, a first oscillation circuit oscillating a resonator and generating a first voltage for automatic gain control for controlling amplitude of a signal output from the resonator, a digital signal generation circuit generating a digital signal corresponding to the first voltage, and a first interface circuit outputting the digital signal to the first terminal.Type: ApplicationFiled: July 13, 2022Publication date: January 19, 2023Inventors: Teppei Higuchi, Jun Uehara, Yuichi Toriumi, Hiroshi Kiya
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Patent number: 11539327Abstract: A circuit device includes an oscillation circuit that generates an oscillation signal by using a vibrator, a frequency adjustment circuit that adjusts an oscillation frequency of the oscillation circuit based on frequency adjustment data, a temperature sensor circuit that outputs temperature data, an arithmetic operation circuit, and a storage circuit. The arithmetic operation circuit outputs converted temperature data by performing, on the temperature data, conversion processing in which a slope of the converted temperature data with respect to the temperature data in a first temperature range is different from a slope of the converted temperature data with respect to the temperature data in a second temperature range. The storage circuit stores a lookup table representing a correspondence between the converted temperature data and the frequency adjustment data.Type: GrantFiled: September 29, 2021Date of Patent: December 27, 2022Inventors: Hideo Haneda, Yuichi Toriumi, Teppei Higuchi
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Publication number: 20220247352Abstract: A circuit device includes an oscillation circuit and a processing circuit that generates capacitance control data. The oscillation circuit includes a variable capacitance circuit whose capacitance value is variably controlled based on the capacitance control data, and an oscillation frequency thereof is controlled based on the capacitance value of the variable capacitance circuit. The variable capacitance circuit includes a capacitor array. The capacitor array includes a plurality of capacitors each having a binary-weighted capacitance value, and a plurality of switches that are on-off controlled based on the capacitance control data. The processing circuit outputs the capacitance control data, which is subjected to dithering, so as to switch the capacitance value of the variable capacitance circuit between a first capacitance value and a second capacitance value in a time division manner.Type: ApplicationFiled: January 28, 2022Publication date: August 4, 2022Inventors: Yuichi TORIUMI, Hideo HANEDA, Teppei HIGUCHI, Atsushi TANAKA
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Publication number: 20220103125Abstract: A circuit device includes an oscillation circuit that generates an oscillation signal by using a vibrator, a frequency adjustment circuit that adjusts an oscillation frequency of the oscillation circuit based on frequency adjustment data, a temperature sensor circuit that outputs temperature data, an arithmetic operation circuit, and a storage circuit. The arithmetic operation circuit outputs converted temperature data by performing, on the temperature data, conversion processing in which a slope of the converted temperature data with respect to the temperature data in a first temperature range is different from a slope of the converted temperature data with respect to the temperature data in a second temperature range. The storage circuit stores a lookup table representing a correspondence between the converted temperature data and the frequency adjustment data.Type: ApplicationFiled: September 29, 2021Publication date: March 31, 2022Inventors: Hideo HANEDA, Yuichi TORIUMI, Teppei HIGUCHI
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Patent number: 10613576Abstract: An oscillator includes a circuit device, a clock output terminal, an error output terminal via which an error signal is outputted, and a clock input terminal, and the circuit device includes a clock signal generation circuit that generates a clock signal, an error signal generation circuit that generates the error signal, and a selection circuit that selects one of the clock signal and a signal inputted via the clock input terminal based on the error signal and outputs the selected signal via the clock output terminal.Type: GrantFiled: December 19, 2018Date of Patent: April 7, 2020Assignee: Seiko Epson CorporationInventors: Yuichi Toriumi, Hisahiro Ito
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Patent number: 10396747Abstract: A temperature compensated oscillation circuit includes an oscillation circuit that oscillates a resonator, a fractional N-PLL circuit that multiplies frequency of an oscillation signal which is output by the oscillation circuit, on the basis of a frequency division ratio which is input, a temperature measurement unit that measures temperature, and a storage unit that stores a temperature correction table for correcting frequency temperature characteristics of the oscillation signal, in which the frequency division ratio of the fractional N-PLL circuit is set on the basis of a measurement value obtained by the temperature measurement unit and the temperature correction table.Type: GrantFiled: June 5, 2017Date of Patent: August 27, 2019Assignee: Seiko Epson CorporationInventors: Hisahiro Ito, Yuichi Toriumi, Nobutaka Shiozaki
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Publication number: 20190196531Abstract: An oscillator includes a circuit device, a clock output terminal, an error output terminal via which an error signal is outputted, and a clock input terminal, and the circuit device includes a clock signal generation circuit that generates a clock signal, an error signal generation circuit that generates the error signal, and a selection circuit that selects one of the clock signal and a signal inputted via the clock input terminal based on the error signal and outputs the selected signal via the clock output terminal.Type: ApplicationFiled: December 19, 2018Publication date: June 27, 2019Inventors: Yuichi TORIUMI, Hisahiro Ito
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Publication number: 20170353171Abstract: A temperature compensated oscillation circuit includes an oscillation circuit that oscillates a resonator, a fractional N-PLL circuit that multiplies frequency of an oscillation signal which is output by the oscillation circuit, on the basis of a frequency division ratio which is input, a temperature measurement unit that measures temperature, and a storage unit that stores a temperature correction table for correcting frequency temperature characteristics of the oscillation signal, in which the frequency division ratio of the fractional N-PLL circuit is set on the basis of a measurement value obtained by the temperature measurement unit and the temperature correction table.Type: ApplicationFiled: June 5, 2017Publication date: December 7, 2017Inventors: Hisahiro ITO, Yuichi TORIUMI, Nobutaka SHIOZAKI
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Patent number: 9628096Abstract: In order to configure an oscillation circuit, an oscillator, a fractional N-PLL circuit, and the like that can output a plurality of frequencies, while decreasing an influence of an integer value boundary spurious at one reference frequency, the oscillation circuit includes a circuit for oscillation that oscillates a resonator, a fractional N-PLL circuit to which a signal from the circuit for oscillation is input, and a non-volatile memory that stores a plurality of division ratios, which can be selected from outside, of the fractional N-PLL circuit. A fractional portion of at least two of the plurality of division ratios is equal to or higher than 0.05 and is equal to or lower than 0.95.Type: GrantFiled: January 28, 2015Date of Patent: April 18, 2017Assignee: Seiko Epson CorporationInventors: Yuichi Toriumi, Hayato Terashi, Mitsuaki Sawada, Hisahiro Ito, Yasunari Furuya
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Patent number: 9548724Abstract: A clock generation device generates a clock signal which has a predetermined number of clocks for each predetermined time in such a way that a clock signal (32.768 kHz+? (? is zero or a positive number)) is input and some clocks of the clock signal are masked.Type: GrantFiled: March 19, 2014Date of Patent: January 17, 2017Assignee: Seiko Epson CorporationInventor: Yuichi Toriumi
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Patent number: 9503108Abstract: An oscillation circuit, an oscillator, an electronic device, and a moving object which are capable of adjusting an output frequency in a high modulation bandwidth with a high level of accuracy and adjusting a timing at which the output frequency is changed are provided. The oscillation circuit generates an oscillation signal by oscillating an oscillation element and includes a communication unit that receives frequency setting data for setting a frequency of the oscillation signal and frequency change data which is given a timing at which the frequency of the oscillation signal is changed on the basis of the frequency setting data, by serial transfer, and registers in which the frequency setting data and the frequency change data received by the communication unit are stored, respectively. An address of the register storing the frequency setting data is continuous with an address of the register storing the frequency change data.Type: GrantFiled: October 15, 2014Date of Patent: November 22, 2016Assignee: Seiko Epson CorporationInventors: Yuichi Toriumi, Nobutaka Shiozaki
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Patent number: 9473153Abstract: An oscillation circuit, an oscillator, an electronic device and a moving object, having at least a serial interface and an output enabling function, which are capable of implementing the control of output enabling without performing exclusive switching control using a switch, are provided. The oscillation circuit generates an oscillation signal by oscillating an oscillation element, and includes a first terminal to which characteristic control data for controlling characteristics of the oscillation signal including at least a frequency is input and to which control data of a first output control signal for controlling an output of the oscillation signal is input.Type: GrantFiled: October 15, 2014Date of Patent: October 18, 2016Assignee: Seiko Epson CorporationInventor: Yuichi Toriumi