| 摘要 |
<p>PURPOSE:To improve the response of control without needing a complicated logic circuit by controlling the rotary phase of the capstan servo system so as to eliminate the tracking deviation of the head. CONSTITUTION:Switch means 4, 5, 6 select and extract regenerative signals 3-2 to 3-4 from other heads 1-2 to 1-4 scanning a tape other than a head 1-1 obtaining a regenerative signal at present and the extraction signal is outputted to detection means 8, 9. The detection means 8, 9 detect the extracted regenerative signal and its detection signal is oututted to a comparison means 13. The comparison means 13 obtain a tracking deviation 400 with a head based on an output signal from the detection means 8, 9 and the deviation is outputted to a rotary phase control means 18, which controls the rotating phase of te capstan servo system so as to eliminate the inputted deviation.</p> |
