| 摘要 |
<p>A servo apparatus of an optical disc (6), comprises: amplitude detecting means (12, 13) for detecting an amplitude of a servo detection signal extracted by an optical pick-up (1) with a focusing servo operating; gain control signal generating means (12, 13) for generating a gain control signal to provide a predetermined relation between the amplitude detected by the amplitude detecting means (12, 13) and a reference value; and control means (12, 13) for holding the gain control signal which is generated by the gain control signal generating means (12, 13) and for controlling the amplitude of the servo detection signal by the gain control signal upon recording or reproducing operation by the optical pick-up (1). <IMAGE></p> |
