| 摘要 |
PURPOSE:To reduce vibration of an actuator and to improve its acceleration performance by inserting an inductor in series with a voice coil motor and controlling rising characteristics of a supply current to the motor. CONSTITUTION:When a driving signal for the voice coil motor 10 is supplied to a terminal F, an operational amplifier 5 and a transistor TR6 operate to turn on a TR7 and turn off a TR8. At this time, a current from a power source V flows through the TR7, the inductance 9, the motor 10, and a TR12. Then when an operational amplifier 14 operates, TRs 13 and 11 turn on and the TR12 turns off. At this time, the current from the power source V flows through the TR11, motor 10, inductance 9, and TR8. Consequently, the acceleration of the actuator arm in a direction A-B increases and vibration in a direction C-D decreases. |
