| 摘要 |
PURPOSE:To reduce the residual vibration of a vibrating unit by providing a circuit which generates a driving signal for the injection of an ink droplet and a circuit which generates an inverted phase against the residual vibration. CONSTITUTION:The output of a monostable-multi vibrator 37 is inputted to the base of a transistor 38 and when this output is ''H'', the transistor 38 is in ON state. The output of a resonance circuit 36 is fed into the negative input (phase inverting input) of a differential amplifier 39 through registors 23, 24. As the gated output of the resonance circuit 36 is fed into the negative input of the differential amplifier 39, the phase of the signal is inputted invertedly at the output side of the differential amplifier 39. A vibrating wave voltage giving the inverted phase vibration is thus impressed to the vibrating unit to eliminale its residual vibration during the period of generating the residual vibration of the vibrating unit. |
