| 摘要 |
<p>A track following system for maintaining a read gap substantially centered on a data track by moving the read gap perpendicular to the direction of the data track. This moving of the read gap is performed to compensate for any original misalignment between the read gap and data track and also to compensate for any wander or movement of the data track to a misaligned position with respect to the read gap. The write gap is used as a source of position information to keep the read gap correctly positioned over the data track. During a track following operation, the write gap circuitry is operatively connected to a track following circuit. Several samples of data signals received by the write gap are analyzed by the track following circuit. The track following circuit operates to compare (24) a first sample (20,22) of such data signals with a second sample (21,23). A positioning device (13) moves the read gap in a direction determined from the result of this comparison and also from the last direction in which the read gap was moved. <IMAGE></p> |
