A printhead includes an address line, data lines, a fire pulse line, and a plurality of primitives, each primitive corresponding to a different data line and including a plurality of activation devices, each activation device corresponding to a different address of a set of addresses. A buffer receives data packets, each data packet including address data representative of an address of the set of addresses and print data for each primitive corresponding to the address. For each data packet, the buffer directs the address data to address logic and places the print data on the respective data line, and the address logic encodes the address represented by the address data onto the address line. For each primitive, the activation device corresponding to the address on the address bus activates a corresponding primitive function based on the corresponding print data when a fire pulse is present on the fire pulse line.

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.

A driver circuit for receiving a voltage supply at a supply input and driving a load through a load output, the circuit comprising: a charge inductor and a discharge inductor; a switching array comprising a plurality of switches; and a load switch coupled between a first terminal of the charge inductor and the load output; the switching array being arranged so that: in a first mode it can couple a second terminal of the charge inductor to the supply input and the first terminal of the charge inductor to ground to load a flux on the charge inductor; in a second mode it can decouple the first terminal of the charge inductor from ground so that, when the load switch is closed, flux can flow from the inductor to the load output; and in a third mode it can couple the discharge inductor between the load output and ground so that flux can be loaded on the discharge inductor from the load output.

Fluid ejection devices with multiple activation modes are disclosed. An example printhead assembly includes a fluid ejection nozzle, a first resistor fluidically coupled to the fluid ejection nozzle, and a second resistor fluidically coupled to the fluid ejection nozzle. The example printhead also includes an addressing circuit to receive a nozzle address and an activation mode to activate the fluid ejection nozzle. The activation mode determines which of the first resistor and the second resistor are to be energized.

There is provided a driving circuit that drives a piezoelectric element having a first electrode that is supplied a first voltage signal and a second electrode that is supplied a second voltage signal, and driven by a potential difference between the first electrode and the second electrode, the driving circuit including: a first voltage signal generation circuit that outputs the first voltage signal; a second voltage signal generation circuit that outputs the second voltage signal; and a switch circuit in which the first voltage signal is input from one end and the other end is electrically connected to the first electrode, a voltage value of the first voltage signal approaches a voltage value of the second voltage signal in a shift period from a first mode that is shifted after power is turned on to a second mode for driving the piezoelectric element.

There is provided a driving circuit that drives a piezoelectric element, the driving circuit including an integrated circuit, in which the integrated circuit includes a first register that holds an operating state data, a second register that holds an abnormality detection data, an abnormality detection circuit that determines the presence or absence of an abnormality of the operating state data based on the abnormality detection data, and an output control circuit that controls supply of a first voltage signal to the piezoelectric element and supply of a power source voltage to the switch circuit, and in which the output control circuit delays stop of the supply of the power source voltage to the switch circuit with respect to stop of the supply of the first voltage signal to the piezoelectric element when the abnormality detection circuit determines that the operating state data is abnormal.

A liquid discharge apparatus includes: a signal line supplied with a print data signal including first data and second data; a discharge head including a plurality of nozzles including a first nozzle and a second nozzle that discharge liquid in accordance with the print data signal; a first register that is connected to the signal line, captures the first data corresponding to the first nozzle, and holds the first data; a second register that is connected to the signal line, captures the second data corresponding to the second nozzle, and holds the second data; and a register selection circuit that exclusively selects either capturing the first data by the first register or capturing the second data by the second register based on register selection data.

The present invention is targeted at suppressing ringing and overvoltage.

A driver circuit (200) drives a plurality of loads (Z.sub.1 to Z.sub.N). A plurality of output terminals (Po.sub.1 to Po.sub.N) are connected to the plurality of loads (Z.sub.1 to Z.sub.N). A plurality of drivers (Dr.sub.1 to Dr.sub.N) correspond to the plurality output terminals (Po.sub.1 to PO.sub.N), and generate driving signals (Vo.sub.#) applied to the respectively corresponding load (Z.sub.#). A plurality of clamp circuits (260_1 to 260_N) correspond to the plurality of drivers (Dr.sub.1 to Dr.sub.N), and include Schottky diodes (SD) connected to input nodes or output nodes of the respectively corresponding drivers (Dr).

A fluidic die may include a fluid actuator comprising an electrical resistor, a power node to supply electrical current to the resistor to drive the fluid actuator, a low side switch transistor connected to a ground node and having a gate to control the flow of electrical current through the resistor, a voltage regulator to receive electrical power from the power node and to output a predetermined voltage and a level shifter to control to output a low side switch transistor gate drive voltage using the predetermined voltage and based upon control signals to control the gate to control fluid displacement by the fluid actuator. The predetermined voltage is greater than a voltage of the control signals and is independent of a resistance of the ground node.

A liquid ejecting apparatus includes a drive circuit in which a first voltage signal is output from an output terminal, a piezoelectric element that includes a first electrode to which the first voltage signal is supplied and a second electrode to which a second voltage signal is supplied and is displaced by a potential difference between the first electrode and the second electrode, a cavity which is filled with a liquid, a vibration plate that is provided between the cavity and the piezoelectric element, and a switch element that is electrically connected to the output terminal and the first electrode. The liquid ejecting apparatus has a mode in which the switch element is controlled to be turned off, and a voltage value of the first voltage signal is controlled to approximate a voltage value of the second voltage signal.