Abstract: There is provided a vibration test support network system that connects a plurality of vibration test devices via a network and supports maintenance of vibration test devices and stabilization of accuracy of the vibration test through analysis of self-diagnosis information by the vibration test devices. A vibration test support network system 300 includes a plurality of vibration test devices 200, a network 210 connecting the plurality of vibration test devices 200, and an analysis device 220 connected to the network 210 and configured to transmit and receive information to and from the plurality of vibration test devices 200 via the network 210.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.