| 摘要 |
An apparatus for eliminating tracking/focus crosstalk in optical and magnetooptical disk drive systems by only sampling the focus error signal on land areas between the grooves of the disk when seeking is described. A logic circuit responsive to the system's tracking error signal generates a pulsed sampling signal whenever the laser spot is positioned over land areas. This pulsed sampling signal is used to sample and hold the focus error signal during the time that the pulsed sampling signal is active.
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