| 摘要 |
<p>PURPOSE:To adjust tracking at the time of specific reproducing by sampling a pilot signal of a reproduced signal by the reference signal varied in accordance with a frequency of a reproduced signal. CONSTITUTION:A master clock generation circuit 24 receives a digital signal reproduced from a magnetic tape 12 and generates a master clock fm. The master clock fm is varied in accordance with a frequency of a reproduced signal. A frequency dividing circuit 26 divides a frequency of the master clock fm, and sent to switched capacitor filters 28c, 28b as a clock fck. The filters 28c, 28b controls a reproduced signal from the magnetic tape 1 with the clock fck, and outputs pilot signals f1, f2. If a frequency of a reproduced signal is alphatimes as much as a frequency at the time of reproducing normally with this constitution at the time of specific reproducing, pilot signals alpha f1, alpha f2 can be obtained in accordance with it.</p> |
