| 摘要 |
<p>PURPOSE:To attain accurate tracking with a comparatively simple circuit by providing a filter eliminating a frequency component having a frequency difference between a reference pilot signal and a pilot signal reproduced from a scanning track from 1st and 2nd detection signals. CONSTITUTION:A band eliminate filter 1 is provided to the title circuit, which eliminates a frequency component having a frequency difference between a reference pilot signal and a pilot signal reproduced from a track adjacent to a scanning track for tracking from 1st and 2nd detection signals. Since the 1st and 2nd detection signals are reduced into only a component in response to the pilot signal on an adjacent rack, the tracking is applied by having only to compare levels of adjacent track pilot signals. Thus, accurate tracking is attained.</p> |
