Abstract: A liquid discharge apparatus includes a discharge head, a drive substrate provided with a signal generation circuit to generate a first and a second signal and an output connector to output the first and second signal, a first and second wire to supply the first and second signal to the discharge head, and a relay substrate to relay the first and second signal from the drive substrate to the first and second wire. The relay substrate includes a relay connector to be connected to the output connector, a first connector to be connected to the first wire and to output the first signal supplied from the output connector to the relay connector to the first wire, and a second connector to be connected to the second wire and to output the second signal supplied from the output connector to the relay connector to the second wire.

Abstract: A liquid discharge apparatus includes: an modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that allows the drive signal to return to the modulation circuit; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. In this configuration, a self-resonant frequency of the capacitor is higher than a frequency of the self-oscillation.

Abstract: A drive circuit for driving a capacitive load is provided. The drive circuit includes a modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a pair of transistors that include a high-side transistor and a low-side transistor and amplify the modulated signal to generate an amplified modulated signal; and a low-pass filter that includes a capacitor and smoothes the amplified modulated signal to generate a drive signal which is applied to the capacitive load, wherein the shortest distance between a low-side transistor and the capacitor is shorter than a shortest distance between the high-side transistor and the capacitor.

Abstract: There is provided a liquid discharging apparatus including: an integrated circuit device; a transistor which generates an amplification modulation signal amplified from a modulation signal pulse-modulated from a source signal based on an amplification control signal; a low pass filter which demodulates the amplification modulation signal and generates a driving signal; and a piezoelectric element which is displaced as the driving signal is applied, in which the integrated circuit device includes a modulation portion which generates the modulation signal; a gate driver which generates the amplification control signal based on the modulation signal; and a charge pump circuit which supplies power to the gate driver, and is included in a package which has a first side and a second side that are adjacent to each other in a plan view, in which the package includes a plurality of package terminals, which are electrically connected to the charge pump circuit.

Abstract: A drive circuit for driving a capacitive load is provided. The drive circuit includes a modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a pair of transistors that include a high-side transistor and a low-side transistor and amplify the modulated signal to generate an amplified modulated signal; and a low-pass filter that includes a capacitor and smoothes the amplified modulated signal to generate a drive signal which is applied to the capacitive load, wherein the shortest distance between a low-side transistor and the capacitor is shorter than a shortest distance between the high-side transistor and the capacitor.

Abstract: A liquid discharge apparatus includes: an modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that allows the drive signal to return to the modulation circuit; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. In this configuration, a self-resonant frequency of the capacitor is higher than a frequency of the self-oscillation.

Abstract: A liquid discharge apparatus includes: a modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a pair of transistors that include a high-side transistor and a low-side transistor and amplify the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. A shortest distance between the low-side transistor and the capacitor is shorter than a shortest distance between the high-side transistor and the capacitor.

Abstract: There is provided a liquid discharging apparatus including: an integrated circuit device; a transistor which generates an amplification modulation signal amplified from a modulation signal pulse-modulated from a source signal based on an amplification control signal; a low pass filter which demodulates the amplification modulation signal and generates a driving signal; and a piezoelectric element which is displaced as the driving signal is applied, in which the integrated circuit device includes a modulation portion which generates the modulation signal; a gate driver which generates the amplification control signal based on the modulation signal; and a charge pump circuit which supplies power to the gate driver, and is included in a package which has a first side and a second side that are adjacent to each other in a plan view, in which the package includes a plurality of package terminals, which are electrically connected to the charge pump circuit.

Abstract: A liquid discharge apparatus includes: an modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that allows the drive signal to return to the modulation circuit; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. In this configuration, a self-resonant frequency of the capacitor is higher than a frequency of the self-oscillation.

Abstract: A liquid discharge apparatus includes: a modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a pair of transistors that include a high-side transistor and a low-side transistor and amplify the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. A shortest distance between the low-side transistor and the capacitor is shorter than a shortest distance between the high-side transistor and the capacitor.

Abstract: A liquid discharge apparatus includes: an modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that allows the drive signal to return to the modulation circuit; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. In this configuration, a self-resonant frequency of the capacitor is higher than a frequency of the self-oscillation.