Capacitive Load Drive Circuit And Method Of Controlling Capacitive Load Drive Circuit

A capacitive load drive circuit that outputs a drive signal for driving a plurality of capacitive loads, the capacitive load drive circuit comprising:

• a modulation circuit that outputs a modulated signal obtained by modulating a base drive signal on which the drive signal is based;
• an amplifier circuit that outputs a first amplified modulated signal obtained by amplifying the modulated signal;
• a level switching signal output circuit that outputs a level switching signal that changes between a first electrical potential and a second electrical potential;
• a level shift circuit that outputs, as a second amplified modulated signal, a signal obtained by shifting a reference electrical potential of the first amplified modulated signal when the level switching signal is at the first electrical potential, and that outputs the first amplified modulated signal as the second amplified modulated signal when the level switching signal is at the second electrical potential;
• and
• a demodulation circuit that demodulates the second amplified modulated signal and outputs the drive signal, wherein
• the level switching signal output circuit switches an electrical potential of the level switching signal in accordance with at least one of a waveform information signal including waveform information of the drive signal or a drive element number information signal including information indicating a number of drive elements that are among the plurality of capacitive loads and are to be driven by the drive signal.