Patent ID: 9744761
Date: 2017-08-29
CPC Classifications: B41J

Claim:
1. A liquid discharge device, comprising: a modulation circuit that generates a modulation signal obtained by pulse-modulating a source signal by self oscillation; a transistor pair which includes a high side transistor and a low side transistor and which generates an amplified modulation signal by amplifying the modulation signal; a demodulator which includes an inductor and a capacitor and which generates a drive signal by smoothing the amplified modulation signal; an piezoelectric element that is displaced when the drive signal is applied; a cavity inside which a liquid droplet is filled and whose internal volume is changed by the displacement of the piezoelectric element; and a nozzle provided to discharge liquid inside the cavity according to the change of the internal volume of the cavity, wherein a distance between the high side transistor and the capacitor is longer than a distance between the inductor and the capacitor.