A liquid ejection device, includes: a drive waveform signal output circuit which outputs a drive waveform signal to serve as a reference for the drive signal a modulator which pulse-modulates the drive waveform signal and thus generates a first modulated signal and a second modulated signal having a different phase from the first modulated signal within a range from greater than 90 degrees to smaller than 270 degrees a first digital power amplifier a second digital power amplifier a first low pass filter which performs low pass filtering of the first amplified digital signal and thus generates a first demodulated signal and a second low pass filter which performs low pass filtering of the second amplified digital signal and thus generates a second demodulated signal wherein the first demodulated signal and the second demodulated signal are combined and applied as the drive signal to the capacitive load.
