| 摘要 |
PURPOSE:To obtain a device which supresses oscillation of a tracking actuator without providing a special detection system with relatively inexpensive constitution by inputting a driving signal of a transmitter to a compensating circuit, and setting an output signal of the said compensating circuit to an input signal of the tracking actuator. CONSTITUTION:When a compensating circuit 12 of a transfer function of a specific equation determined by proportional gain, which converts a driving current IM to a force FM, the driving current is outputted from a linear-motor driving control circuit 8 to a linear motor 7, and an optical head 6 is transmitted. Even if this transmitting quantity xM operates the oscillating system of a tracking actuator 3 as forced displacement, the relative position between the optical head 6 and the tracking actuator 3 can be controlled at a constant value, because the force FA operates the said tracking actuator 3 so that the relative position between the optical head 6 and the tracking actuator 3 will not oscillate by the compensating circuit 12 which sets the driving current as an input, and a tracking actuator driving circuit 11. |
