| 摘要 |
PROBLEM TO BE SOLVED: To obtain a drive circuit of an ink jet recorder employing ultrasonic wave in which power consumption can be reduced significantly while reducing the size, weight and price. SOLUTION: A parallel LC circuit 76 of an inductance L3 and a capacitor C5 and an amplitude limiting resistor R7 are connected in series across an inductance Ld for fixing tuning connected in parallel with a degeneration electric equivalent circuit 60 of an oscillator of piezoelectric element. When the capacitor is varied in print pattern at the degeneration electric equivalent circuit 60 of an oscillator driven simultaneously, the LC circuit 76 acts to compensate a deficient complex component for a driving frequency. Since the LC circuit 76 is connected in parallel with an LC circuit (tank circuit) comprising an oscillator capacitor and a fixed inductance as an equivalent circuit, capacity variation is supplemented including the complex component and the LC circuit can be driven at a constant frequency. |
