| 摘要 |
<p>A digital filter (5) filters the output of an A/D converter (3). An adding means (10) adds the delayed output of a delaying means (9) to the output of the digital filter (5). An extracting means (6) extracts driving data (11) from the sum data. Error data (12), which are the residual data after the extraction by the extracting means (6), are delayed with the delaying means (9) by a certain time, and are inputted to the adding means (10). A driving means (7) drives an optical device (2) according to the driving data (11). In this manner, by adding the error data (12) to the output of the digital filter (5) through feedback, the driving accuracy of the optical disc device is improved and the control of a good positioning accuracy can be performed. <IMAGE></p> |
