| 摘要 |
<p>PURPOSE: To reduce a noise component displayed on a screen at the time of the slow travel of a tape by controlling a system so that stopped time becomes time when the sizes of right and left DC components of a video signal become equal at the time of a slow operation. CONSTITUTION: A signal outputted through a servo motor 1 is amplified by a preamplifier 2 and the signal amplified by the preamplifier 2 is amplified and outputted by the video signal detected by an amplifier 3. The video signal amplified by the circuit 3 is applied to a shaping circuit 4 and the DC component is detected. The DC component of the video signal outputted here is shaped and it is applied to a micro computer 5. The micro computer 5 compares the sizes of the right/left sides of the input DC component by a reference signal REF from outside and tracking data for controlling the sizes of the right/left sides to be equal is outputted. On the other hand, slow tracking data outputted from the micro computer 5 is applied to a drive circuit 6 and a motor 1 is controlled by slow tracking data.</p> |
