ACTUATOR CAPABLE OF CONTROLLING VOLTAGE SENSITIVITY AND A PHASE, AND OPTICAL PICKUP COMPRISING ACTUATOR THEREIN, CONCERNED WITH IMPROVING A TILT DRIVING POWER OF THE ACTUATOR

摘要

PURPOSE: An actuator capable of controlling voltage sensitivity and a phase, and an optical pickup comprising actuator therein are provided to supply an optical pickup actuator having a current feedback circuit which can increase voltage sensitivity of a moving magnetic type actuator. CONSTITUTION: A system driving IC(21) outputs a tracking control signal, a focus control signal, and a tilt control signal. A current feedback portion(40) synthesizes the tracking control signal, the focus control signal, and the tilt control signal, inputs currents corresponding to the signals to a coil of an actuator(50), and senses a current applied to the actuator(50), then synthesizes feedback signals to re-apply the signals to the actuator(50). The actuator(50) inputs a sum signal and a difference signal with the tracking control signal, and outputs the feedback signals.