Abstract: A system includes a characteristics acquirer, a selector, and a notifier. The characteristics acquirer acquires pieces of ejection characteristics information regarding ejection characteristics of a plurality of heads different from one another. The selector selects a first liquid ejecting head from among the plurality of heads based on the pieces of ejection characteristics information. The notifier notifies a user of information regarding the first liquid ejecting head.

Abstract: The present invention aims to improve the efficiency of automobile development by front loading the evaluation of an on-road driving test, and comprises a virtual evaluation step of simulating the on-road driving test using a driving environment model which models a driving environment, an operating state model which models an operating state, and a vehicle model which models the actual vehicle; a bench test evaluation step of imitating the on-road driving test by combining a part or all of the actual vehicle, a part or all of the vehicle model, a part or all of the driving environment model, and a part or all of the operating state model, and conducting a bench test of a part or all of the actual vehicle, and an on-road driving test evaluation step of conducting the on-road driving test of the actual vehicle in a real driving environment.

Abstract: A liquid ejecting apparatus includes a load drive circuit that outputs a drive signal. The drive circuit includes a first gate drive circuit that outputs a first gate drive signal corresponding to a modulated signal output by a modulation circuit; a second gate drive circuit that outputs a second gate drive signal corresponding to the modulated signal; and an amplification circuit that outputs an amplified modulated signal by driving of a first transistor driven in response to the first gate drive signal and a second transistor driven in response to the second gate drive signal. The first transistor and the second transistor include gallium nitride. The first gate drive circuit and the first transistor are accommodated in a single package and constitute a first semiconductor device. The second gate drive circuit and the second transistor are accommodated in a single package and constitute a second semiconductor device.

Abstract: A liquid ejecting apparatus includes a capacitive load drive circuit that outputs a drive signal for displacing a capacitive load. The capacitive load drive circuit includes a gate drive circuit that outputs a first gate drive signal corresponding to a modulated signal output by a modulation circuit and a second gate drive signal corresponding to the modulated signal; an amplification circuit that outputs an amplified modulated signal by driving of a first transistor driven in response to the first gate drive signal and a second transistor driven in response to the second gate drive signal; and a demodulation circuit that outputs the drive signal obtained by demodulating the amplified modulated signal. The first transistor and the second transistor include gallium nitride. The gate drive circuit, the first transistor, and the second transistor are accommodated in a single package and constitute a semiconductor device.

Abstract: A capacitive load drive circuit includes a modulation circuit that outputs a modulated signal obtained by a base drive signal; an amplifier circuit that outputs a first amplified modulated signal obtained by amplifying the modulated signal; a level switching signal output circuit that outputs a level switching signal that changes between a first electrical potential and a second electrical potential; a level shift circuit that outputs a second amplified modulated signal based on the level switching signal; and a demodulation circuit that demodulates the second amplified modulated signal and outputs the drive signal. The level switching signal output circuit switches an electrical potential of the level switching signal in accordance with at least one of a waveform information signal or a drive element number information signal including information indicating a number of elements that are among the capacitive loads and are to be driven by the drive signal.

Abstract: In a liquid ejecting apparatus, a drive circuit that outputs a drive signal includes a modulation circuit that outputs a modulated signal, an amplifier circuit that outputs a first amplified modulated signal obtained by amplifying the modulated signal, a level switching signal output circuit that outputs a level switching signal, a level shift circuit that switches, whether to output, as a second amplified modulated signal, a signal obtained by shifting a reference electrical potential of the first amplified modulated signal or output the first amplified modulated signal as the second amplified modulated signal, and a demodulation circuit that outputs the drive signal obtained by demodulating the second amplified modulated signal. The level switching signal output circuit switches an electrical potential of the level switching signal in accordance with at least one of a waveform information signal or a drive element number information signal.

Abstract: A liquid ejecting apparatus includes a capacitive load drive circuit that outputs a drive signal for displacing a capacitive load. The capacitive load drive circuit includes an amplification circuit that outputs an amplified modulated signal by driving of a first transistor and a second transistor, the first transistor being driven in response to a first gate drive signal corresponding to a modulated signal obtained by modulating a base signal output, the second transistor being driven in response to a second gate drive signal corresponding to the modulated signal; and a demodulation circuit that outputs the drive signal obtained by demodulating the amplified modulated signal. The first transistor and the second transistor includes a first layer including a first nitride semiconductor, and a second layer including a second nitride semiconductor having a band gap larger than that of the first nitride semiconductor. The second layer is disposed above the first layer.

Abstract: A drive circuit includes a modulation circuit that modulates a base drive signal that is a base of a drive signal, and outputs a modulation signal, an amplification circuit that outputs a first amplified modulation signal obtained by amplifying the modulation signal, a level switching signal generation circuit that generates a level switching signal that is a digital signal, a level shift circuit that outputs the first amplified modulation signal as a second amplified modulation signal, or outputs, as the second amplified modulation signal, a signal obtained by shifting a potential of the first amplified modulation signal, and a demodulation circuit that demodulates the second amplified modulation signal, and outputs the drive signal. A voltage of the drive signal is lower than a power supply voltage of the level shift circuit when the level shifts circuit shift a potential of the first amplified modulation signal.

Abstract: A drive circuit includes a modulation circuit that outputs a modulation signal, an amplification circuit that outputs a first amplified modulation signal obtained by amplifying the modulation signal, a reference signal generation circuit that generates a reference signal corresponding to the base drive signal, a level switching signal generation circuit that receives, as an input, the reference signal, and generates a level switching signal, a level shift circuit that outputs the first amplified modulation signal, or outputs a signal obtained by shifting a potential of the first amplified modulation signal, a demodulation circuit that demodulates the second amplified modulation signal, and outputs the drive signal, and a feedback circuit that outputs a first feedback signal in response to the drive signal. The level switching signal generation circuit switches a potential of the level switching signal in response to the reference signal and the first feedback signal.

Abstract: A drive circuit includes a modulation circuit that outputs a modulation signal, a level switching signal generation circuit that generates a level switching signal, an amplification level shift circuit that includes a first switching element and a second switching element that perform switching in response to the modulation signal, and a third switching element and a fourth switching element that perform switching in response to the level switching signal, outputs an amplified modulation signal obtained by amplifying the modulation signal, or outputs a signal obtained by shifting a potential of the amplified modulation signal, and a demodulation circuit that demodulates the signal output from the amplification level shift circuit, and outputs the drive signal. On-resistances of the first switching element and the second switching element are larger than an on-resistance of the third switching element and an on-resistance of the fourth switching element.

Abstract: The present invention is a verification-cycle generation method for generating a verification cycle for vehicle development, the verification cycle being a realistic one and satisfying boundary conditions for a plurality of vehicles, wherein a plurality of datasets concerning a drive cycle are input, the plurality of datasets are individually clustered and classified into a plurality of data groups, a plurality of verification cycles concerning vehicle development are generated on the basis of the plurality of clustered data groups, each of the plurality of verification cycles is carried out through simulation or with an actual machine, and a representative cycle that best satisfies user-defined criteria is selected from among the plurality of verification cycles.

Abstract: A drive signal output circuit outputs a drive signal for driving a capacitive load and includes: a modulation circuit that modulates a base drive signal on which the drive signal is based, and outputs the modulated base drive signal as a modulated signal, an amplifier circuit that amplifies the modulated signal and outputs the amplified modulated signal, and a demodulation circuit that demodulates the amplified modulated signal and outputs the demodulated signal as the drive signal. The demodulation circuit includes an inductive circuit, a capacitive circuit, and a switch circuit. The amplified modulated signal is input to a first end of the inductive circuit. A second end of the inductive circuit is electrically coupled to a first end of the capacitive circuit. The switch circuit switches an inductance value of the inductive circuit between a first inductance value and a second inductance value different from the first inductance value.

Abstract: A method of controlling a liquid ejecting apparatus includes: outputting a drive signal obtained by amplifying a base drive signal; and ejecting liquid in accordance with the drive signal. The drive signal is generated by modulating, amplifying, and demodulating the base drive signal. In the outputting the drive signal obtained by demodulating the amplified modulated signal, the amplified modulated signal is demodulated using an inductive circuit having a first inductance value in a first period of time when a voltage value of the drive signal is controlled to be constant at a first electrical potential, and the amplified modulated signal is demodulated by using the inductive circuit having a second inductance value lower than the first inductance value in a second period of time when the voltage value of the drive signal changes from the first electrical potential toward a second electrical potential.

Abstract: A drive circuit includes a modulation circuit that modulates a base drive signal that is a base of a drive signal for driving a drive section, and outputs a modulation signal, an amplification circuit that outputs a first amplified modulation signal obtained by amplifying the modulation signal, a level switching signal generation circuit that generates a level switching signal as a digital signal including a first potential and a second potential, a level shift circuit that outputs the first amplified modulation signal as a second amplified modulation signal, and outputs, as the second amplified modulation signal, a signal obtained by shifting a potential of the first amplified modulation signal, and a demodulation circuit that demodulates the second amplified modulation signal, and outputs the drive signal. The level switching signal generation circuit switches a potential of the level switching signal in response to the base drive signal and the modulation signal.

Abstract: A drive circuit includes a modulation circuit that outputs a modulation signal, an amplification circuit that outputs a first amplified modulation signal obtained by amplifying the modulation signal, a level switching signal generation circuit that generates a level switching signal, a level shift circuit that outputs the first amplified modulation signal, or outputs a signal obtained by shifting a potential of the first amplified modulation signal, and a demodulation circuit that demodulates a second amplified modulation signal output by the level shift circuit, and outputs the drive signal, a feedback circuit that outputs a feedback signal to the modulation circuit, and a stop time duration measurement circuit that outputs a stop time duration measurement signal in response to the modulation signal. The level switching signal generation circuit switches a potential of the level switching signal in response to the base drive signal and the stop time duration measurement signal.

Abstract: A drive circuit includes a modulation circuit that modulates a base drive signal, and outputs a modulation signal, an amplification circuit that outputs a first amplified modulation signal obtained by amplifying the modulation signal, a level switching signal generation circuit that generates a level switching signal, a level shift circuit that outputs the first amplified modulation signal as a second amplified modulation signal when the level switching signal has the first potential, and outputs, as the second amplified modulation signal, a signal obtained by shifting a potential of the first amplified modulation signal when the level switching signal has the second potential, and a demodulation circuit that demodulates the second amplified modulation signal. A threshold when the level switching signal generation circuit switches from the first potential to the second potential is different from a threshold when switching from the second potential to the first potential.

Abstract: A capacitive load drive circuit includes: an amplifier circuit that outputs a first amplified modulation signal obtained by modulating a base drive signal and amplifying the modulation signal; a level switching signal output circuit that outputs a level switching signal; a level shift circuit that outputs the first amplified modulation signal or outputs a signal obtained by shifting a potential of the first amplified modulation signal as a second amplified modulation signal; a demodulation circuit that demodulates the second amplified modulation signal and outputs a drive signal; and a feedback circuit that outputs a feedback signal corresponding to the drive signal. A state of the level switching signal output circuit includes a first state in which the level switching signal according to the feedback signal is output, and a second state in which the level switching signal constant is output.

Abstract: A liquid ejection apparatus includes: a booster circuit configured to boost a supply voltage signal; an inductor having one end supplied with the supply voltage signal; a switch having one end coupled to the other end of the inductor; a first output diode having an anode terminal coupled to the one end of the switch; a first output capacitor having one end coupled to a cathode terminal of the first output diode; a first charging capacitor having one end coupled to the one end of the switch; a first charging diode having an anode terminal coupled to the cathode terminal of the first output diode; a second output diode having an anode terminal coupled to a cathode terminal of the first charging diode and the other end of the first charging capacitor; and a second output capacitor having one end coupled to a cathode terminal of the second output diode.

Abstract: A capacitive load drive circuit includes: a first digital amplifier circuit configured to output a first amplified signal to a first output node; a bootstrap circuit that includes a capacitor element coupled to the first output node and a second output node and a diode element including an anode terminal coupled to a third propagation node and a cathode terminal coupled to the second output node; a second digital amplifier circuit coupled to the first output node and the second output node and configured to output a second amplified signal to a third output node; a smoothing circuit configured to smooth the second amplified signal; and a voltage limiting circuit that is configured to switch a conduction state between the third propagation node and the second output node according to a potential difference between the third propagation node and the second output node.

Abstract: A liquid discharge apparatus includes a liquid discharge head that includes a plurality of capacitive loads driven by being supplied with a drive signal and discharges a liquid by driving the plurality of capacitive loads, and a capacitive load drive circuit, in which the capacitive load drive circuit includes a correction circuit, a modulation circuit, an amplification circuit, a demodulation circuit, and a feedback circuit, and the correction circuit outputs the correction base drive signal corrected according to the number of drive capacitive loads driven by the drive signal among the plurality of capacitive loads.