Patent ID: 7887149

Claim:
A capacitive load driving circuit connected to a capacitive load that causes ejection, from an ejecting nozzle, of a liquid droplet of a droplet amount that corresponds to a voltage level of charging voltage, the capacitive load driving circuit comprising: a first line that applies the charging voltage to the capacitive load; a power source line carrying dc voltage that is supplied from a power source for driving of the capacitive load; a charging control signal line that controls a voltage level of the charging voltage with respect to the capacitive load; an N-type electric field effect transistor to whose source the first line is connected, and to whose drain the power source line is connected, and to whose gate the charging control signal line is connected; and a first selector selecting, from among a plurality of voltages whose voltage levels are respectively different and are less than or equal to a voltage level of the dc voltage, a voltage level of a voltage to be applied to the gate of the N-type electric field effect transistor via the charging control signal line.