| 摘要 |
<p>A head-switching circuit for switching a first head operating on a first recording medium to a second head operating on a second recording medium so as to read out data written on a recording medium according to a staggered servo mechanism, includes a selector for selecting one of the recording media, a classifier (20, 30, 31, 32 and 33) for classifying the skew time of a recording medium selected by the selector and another recording medium selected by the selector, a sync signal generator (40, 41, 42, 50, 51, 60, 61, 62, 70, 71, 72 and 80) enabled by the output signal of the classifier and for generating a sync signal when the skew time is indentical with a predetermined time, thereby generating a sync signal precisely during head-switching in staggered servo mechanism.</p> |
