| 摘要 |
<p>PURPOSE:To obtain an excellent regenerative control signal in a wide running speed range by eliminating a noise component from the output signal of a control signal, switching a frequency characteristic according to the scanning speed of a magnetic tape, and automatically controlling a gain. CONSTITUTION:In a normal reproducing mode, a sequence is operated to make the switch of a change-over switch 201 of a filter circuit 200 to a contact point (b), and to turn on a switch 212 of an amplifier 210. Next, in a slow reproducing mode, the sequence is controlled to make the switch of the change-over switch 201 of the filter circuit 200 to a contact point (a), and to turn on a switch 211 of the amplifier 210. Then, in the quick traverse/rewind mode, the change-over switch 201 of the filter circuit 200 is switched to a contact point (c), and so as to turn on a switch 213 of the amplifier 210. Thus, the regenerative control signal detected by a control signal head 10 can be excellently reproduced in the wide speed range.</p> |
