| 摘要 |
<p>PURPOSE:To eliminate the influence of noise even when a magnetic tape having inferior linearity is reproduced. CONSTITUTION:A digitalized envelope signal is supplied to a min. value detecting part 5, and the min. value of the envelope signal is detected at a fixed periodical intervals by the min. value detecting part 5. An FG number is allotted to an FG signal by an FG numbering circuit 15, and is supplied to a reset trigger generating circuit 14. The FG number is detected by the reset trigger generating circuit 14, and when the number is a prescribed number, a reset signal is generated, and the min. value stored in the min. value detecting circuit 5 is reset. A tracking control value is decided by a tracking control part 6 from the min. value, and according to the tracking control value, a motor control voltage for controlling a capstan motor 10 is outputted by a capstan servo control part 7.</p> |
