Method for determining track searching direction
A method for determining track searching direction is disclosed. The method takes advantage of the characteristic that the movement of the photo diode with respect to the disk is not perpendicular to the track direction, and therefore the phase difference between front side and rear side of the phot...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | A method for determining track searching direction is disclosed. The method takes advantage of the characteristic that the movement of the photo diode with respect to the disk is not perpendicular to the track direction, and therefore the phase difference between front side and rear side of the photo diode could be used to define a seeking error signal. The seeking error signal is then used with the tracking error (TE) signal or the radio frequency ripple (RPRF) signal to determine the track searching direction. Because the seeking error signal has better signal-to-noise ratio, the phase lead or lag can be determined more accurately. Therefore, the accuracy of detecting the track searching direction on a blank disk is improved. |
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