| 摘要 |
<p>PURPOSE:To enable a stable reproduction of recorded data by obtaining the locus approximate to a track pattern even in the half speed mode. CONSTITUTION:The target value generated in a target value outputting device 6a is corrected basing on the phase of a head detected by a PG detector 20. The correction, when the signal in course of reading is to be reproduced and outputted, is made in such a manner that a trace error is made to decrease by quickly rotating a capstan motor 1. By this correction signal, the number of rotation of the capstan motor 1 outputted from a frequency detector 5 is corrected, then the result is fed back to the capstan motor 1 through a motor driver 17.</p> |
