| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid ejector which realizes preferable signal transmission reducing crosstalk noises generated between pieces of high-density wiring. SOLUTION: Driving signal wiring 140 for transmitting a driving signal imparted to a piezoelectric actuator 58 is arranged at almost the same interval from pieces 142 and 144 of sensing signal wiring, in such a manner as to be sandwiched between the pieces 142 and 144 of sensing signal wiring for transmitting a sensing signal and an inversion signal, which can be obtained from a sensor 59. Since electrostatic coupling capacitances Cs1 and Cs2 become parasitic between the driving signal wiring 140 and the pieces 142 and 144 of sensing signal wiring, the crosstalk noise of almost the same level and almost the same phase is superposed on the sensing signal and the inversion signal. When a difference between the sensing signal and the inversion signal, on which the crosstalk noise is superposed, is obtained in a signal processing part 85, a differential signal, from which the crosstalk noise is removed, can be obtained. COPYRIGHT: (C)2007,JPO&INPIT
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