| 摘要 |
<p>A tracking control circuit for, for example, an optical disc apparatus, for performing a tracking by feeding back a tracking error signal corresponding to deviation of an optical beam from a recording track in the track pitch direction and a differentiated signal of the tracking error signal. Stable tracking control insusceptible to runaway may be realised by feeding back a polarity inverted signal of the differentiated signal during the off-track condition.</p> |
