Head unit and liquid ejecting apparatus

A liquid ejecting apparatus comprising:

• a drive signal output circuit that outputs a drive signal corrected based on a temperature information signal;
• and
• a head unit that ejects a liquid by receiving the drive signal, wherein
• the head unit includes:
• a first print head that ejects the liquid by receiving the drive signal;
• and
• a temperature information output circuit that outputs the temperature information signal indicating a temperature of the first print head,
• the first print head includes:
• a first piezoelectric element including a first electrode, a second electrode, and a first piezoelectric body, having the first piezoelectric body that is located between the first electrode and the second electrode in a first stacking direction in which the first electrode, the second electrode, and the first piezoelectric body are stacked, and driven by receiving the drive signal;
• a first vibration plate located on one side of the first piezoelectric element in the first stacking direction and deformed due to drive of the first piezoelectric element;
• a first pressure chamber substrate located on one side of the first vibration plate in the first stacking direction and provided with a first pressure chamber having a volume that changes due to deformation of the first vibration plate;
• a first nozzle for ejecting the liquid according to change in the volume of the first pressure chamber;
• and
• a first temperature detection section located on another side of the first vibration plate in the first stacking direction to detect first temperature information corresponding to a temperature of the first pressure chamber and output the first temperature information as a first temperature signal, and
• the temperature information output circuit includes:
• a first amplification circuit that amplifies a difference between a first reference potential signal and the first temperature signal;
• an output control circuit that outputs the temperature information signal according to an output of the first amplification circuit;
• and
• a reference voltage control circuit that controls a voltage value of the first reference potential signal.