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METHOD FOR PRE-CALIBRATING BALANCE GAIN OF ANALOG FRONT END IN OPTICAL DISK DRIVE TO CALIBRATE VARIATION OF FOCUS BALANCE
METHOD FOR PRE-CALIBRATING BALANCE GAIN OF ANALOG FRONT END IN OPTICAL DISK DRIVE TO CALIBRATE VARIATION OF FOCUS BALANCE
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机译:预先校准光碟驱动器模拟前端的平衡增益以校准聚焦平衡的方法
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摘要
A method for pre-calibrating a balance gain of an analog front end in an optical disk drive to calibrate a variation of a focus balance. The method includes the steps of: adjusting the balance gain of the focus balance; moving a lens and getting an S curve; and comparing a positive half cycle of the S curve with a negative half cycle of the S curve. When the positive half cycle is equal to the negative half cycle, it represents that the balance gain of the focus balance is optimized and the procedure ends; or otherwise the above-mentioned steps are repeated to adjust the balance gain of the focus balance again. Because the balance gain is pre-calibrated, the optimal power calibration, the successful disk-reading possibility, the write-in quality and the stability of the disk judging mechanism can be enhanced and the consistency and the stability of the product can be improved.
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