Patent ID: 8201905

Claim:
A method for driving an ink jet head of an ink jet printer, said ink jet head having a nozzle for jetting liquid drops, and an actuator provided in correspondence to the nozzle, the method comprising: outputting, by a modulated signal data output circuit, a modulated signal data; outputting, by a drive pulse output circuit, a drive pulse to the actuator based on the modulated signal data; the step of outputting the drive pulse comprising: storing, by a storage unit, the modulated signal data in a memory; reading out, by a modulated signal data read-write unit, the modulated signal data from the memory and pulse-modulating the modulated signal data to output a pulse modulated signal; power-amplifying, by a digital power amplifier, the pulse modulated signal; and smoothing, by a low pass filter, the pulse modulated signal power-amplified in the power-amplifying step to output the pulse modulated signal to the actuator as the drive pulse.