Capacitive load driving device and fluid ejection device

A capacitive load driving device comprising:

• a drive waveform generator that is adapted to generate a drive waveform signal;
• a subtraction section that is adapted to output a differential signal between the drive waveform signal and one of a first feedback signal and a second feedback signals;
• a modulator that is adapted to obtain a modulated signal by perform pulse modulation on the differential signals;
• a digital power amplifier that is adapted to obtain an amplified digital signal by power-amplify the modulated signal;
• a low pass filter that includes an inductor and a capacitor, the low pass filter being adapted to smooth the amplified digital signal to obtain a drive signal of a capacitive load;
• a first feedback circuit that is adapted to feed back the drive signal to the subtraction section as the first feedback signal;
• and
• a second feedback circuit that is adapted to set forward a phase of the drive signal and to feed back the drive signal with the set forward phase to the subtraction section as the second feedback signal.