In some examples, a control circuit for a bypass capacitor includes a switch assembly that is activatable between a first state to connect the bypass capacitor between nodes, and a second state to disconnect the bypass capacitor between the nodes. The switch assembly includes a first switch to activate a first path comprising a first resistance to begin charging the bypass capacitor, and a second switch to, a delayed time after the activating of the first path, activate a second path comprising a second resistance lower than the first resistance, the activated second path connecting the bypass capacitor between the nodes.

An ink jet head includes an actuator, a driver IC, a first capacitor, a second capacitor, and a fuse. The actuator is configured to cause ink to be discharged from nozzles. The driver IC is configured to drive the actuator. The first capacitor is connected between a ground line and a first node of a power supply line connected to the driver IC . The second capacitor is connected between a ground line and a second node of the power supply line . A capacitance of the second capacitor is less than a capacitance of the first capacitor. The fuse is on the power supply line between the first node and the second node.

In a liquid discharge apparatus, a circuit substrate includes a first terminal group provided on a first surface and a second terminal group provided on a second surface. The first terminal group includes a first terminal to which a first signal is input, a second terminal to which a second signal is input, and a third terminal to which a reference voltage signal is input. The second terminal group includes a fourth terminal electrically coupled to the first terminal, a fifth terminal electrically coupled to the second terminal, and a sixth terminal electrically coupled to the third terminal. The first terminal and the second terminal are arranged side by side. The third terminal is not located between the first terminal and the second terminal. The fourth terminal and the fifth terminal are arranged. The sixth terminal is located between the fourth terminal and the fifth terminal.

An information processing apparatus including a storage device obtains an energized time to the storage device in a standby state where no job is being executed and a number of accesses to the storage device during the standby state. The information processing apparatus provides a display relating to a lifetime of the storage device based on the energized time and the number of accesses to the storage device.

A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.

An inkjet recording apparatus has a head, a first board, and a second board. The head has a plurality of nozzles and a plurality of driving elements. The first board includes a control circuit and a sensing circuit unit. The second board includes a driving voltage generator and a driver circuit. The driver circuit makes ink ejected. The driving voltage generator and the driver circuit are connected together via a first power supply line. The sensing circuit unit is connected to the first power supply line and outputs a first sensing signal. Based on the first sensing signal, the control circuit senses an abnormality in power supply on the second board.

A fluidic die may include an array of fluid actuators comprising a first set of fluid actuators and a second set of fluid actuators. The fluidic die may further include a first power line connected to the first set of fluid actuators, a second power line connected to the second set of fluid actuators and a third power line connected to the first set of fluid actuators.

A liquid discharge device includes a liquid discharge head to discharge liquid and circuitry configured to generate a drive waveform to drive the liquid discharge head. The circuitry converts, to an analog signal, drive waveform voltage data being a source of the drive waveform; amplifies in voltage the analog signal to generate a drive waveform voltage signal; amplifies in current the drive waveform voltage signal to generate the drive waveform; monitors the drive waveform to detect an abnormality of the drive waveform; controls an operation of the liquid discharge device based on a result of detection of the abnormality of the drive waveform; compares an output of the voltage amplifier and an output of the current amplifier to output a difference between the output of the voltage amplifier and the output of the current amplifier; and outputs a binarized signal based on the difference.

Ink in a print head is heated to a target temperature by driving heating elements included in a print head. After heating control is completed, operation that is performed using power stored in a power storage unit is started. The target temperature in the heating control is determined in such a manner that the temperature of the print head when the operation is started is a set temperature or higher.

A capacitive load driving circuit includes a first switching element, a second switching element, a third switching element, a fourth switching element and voltage dropper elements. The first switching element is provided on a first charging path extending from a power supply to a capacitive load. The second switching element is provided on a second charging path extending from a capacitor to the capacitive load. The third switching element is provided on a first discharging path extending from the capacitive load to a ground. The fourth switching element is provided on a second discharging path extending from the capacitive load to the capacitor. The voltage dropper elements are provided on each of control signal power supply paths to the first switching element, to the second switching element, to the third switching element and to the fourth switching element. The voltage dropper elements are configured to make electric current flow more easily through the second charging path than through the first charging path when charging the capacitive load and to make electric current flow more easily through the second discharging path than through the first discharging path when discharging the capacitive load by a potential difference.