Liquid discharging apparatus, head unit, capacitive load driving circuit, and integrated circuit device for capacitive load driving

A head unit comprising:

• an integrated circuit device;
• a feedback circuit;
• 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;
• a piezoelectric element which is displaced as the driving signal is applied;
• a cavity in which the inside is filled with liquid and the internal volume changes due to the displacement of the piezoelectric element;
• and
• a nozzle which communicates with the cavity, and discharges the liquid inside the cavity as liquid droplets in accordance with the change in the internal volume of the cavity,
• wherein 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 feedback terminal which is electrically connected to the modulation portion and the feedback circuit,
• wherein the feedback circuit generates a feedback signal based on the driving signal, and sends back the feedback signal to the modulation portion, and
• wherein the gate driver is disposed outside the shortest straight path between the feedback terminal and the modulation portion.

A capacitive load driving circuit comprising:

• an integrated circuit device;
• a feedback circuit;
• 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;
• and
• a low pass filter which demodulates the amplification modulation signal, generates a driving signal, and outputs the driving signal to a capacitive load,
• wherein 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 feedback terminal which is electrically connected to the modulation portion and the feedback circuit,
• wherein the feedback circuit generates a feedback signal based on the driving signal, and sends back the feedback signal to the modulation portion, and
• wherein the gate driver is disposed outside the shortest straight path between the feedback terminal and the modulation portion.

An integrated circuit device for capacitive load driving comprising:

• a modulation portion which generates a modulation signal;
• a gate driver which generates an amplification control signal that controls a transistor which drives a capacitive load, based on the modulation signal;
• and
• a feedback terminal which is electrically connected to the modulation portion and the feedback circuit,
• wherein the feedback circuit generates a feedback signal from the capacitive load, and sends back the feedback signal to the modulation portion, and
• wherein the gate driver is disposed outside the shortest straight path between the feedback terminal and the modulation portion.