Invention Grant
US06519106B1 Method and apparatus for correcting digital asymmetric read signals
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用于校正数字非对称读信号的方法和装置
- Patent Title: Method and apparatus for correcting digital asymmetric read signals
- Patent Title (中): 用于校正数字非对称读信号的方法和装置
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Application No.: US09553073Application Date: 2000-04-20
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Publication No.: US06519106B1Publication Date: 2003-02-11
- Inventor: Nan Ling Goh , Ban Hok Goh , Utt Heng Kan , Kah Liang Gan
- Applicant: Nan Ling Goh , Ban Hok Goh , Utt Heng Kan , Kah Liang Gan
- Main IPC: G11B535
- IPC: G11B535

Abstract:
A method for compensating digital samples of an asymmetric read signal is presented. The method involves reading a digital sample of an asymmetric read signal V(t) (160), generating a compensated sample at least when the digital sample requires compensation (164), and outputting either the digital sample (168) or the compensated sample (166). Also presented is an asymmetry correction block (158) of a read channel (144) of a disc drive (110) that includes an input (200), a level detector (202), a compensator (204), and an output (208). The level detector (202) and the compensator (204) receive the digital sample through the input (200). The level detector (202) determines whether the digital sample requires compensation. The compensator (204) generates a compensated sample at least when the digital sample requires compensation. The output (208) selectively outputs either the digital sample or the compensated sample.
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