Liquid discharging apparatus, head unit, and control method of liquid discharging apparatus

A driving circuit for driving a capacitive load comprising:

• a modulation circuit which generates a modulation signal which is obtained by pulse-modulating a source signal;
• a transistor which generates an amplified modulation signal by amplifying the modulation signal;
• a low pass filter which generates a drive signal by smoothening the amplified modulation signal;
• a capacitive load which is driven by receiving the drive signal;
• and
• a multilayer circuit substrate on which the modulation circuit, the transistor, and the low pass filter are mounted,
• wherein a signal based on the modulation signal, the amplified modulation signal, or the drive signal is fed back to the modulation circuit, in such a manner that the modulation circuit generates the modulation signal,
• wherein the multilayer circuit substrate has a multilayer configuration constituted of three or more layers which include at least one layer other than two surface layers, and
• wherein a feedback wiring pattern through which the modulation signal, the amplified modulation signal, or the drive signal is fed back to the modulation circuit is provided in the one layer.