Method and apparatus for write compensation of perpendicular magnetic recording in disk drive
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United States of America Patent
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Jun 7, 2005
Grant Date -
Sep 26, 2002
app pub date -
Mar 15, 2002
filing date -
Mar 23, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
There is disclosed a write compensator which suppresses bit shift caused by distortion of a read signal waveform of a read head in a disk drive adopting a perpendicular magnetic recording system. The write compensator executes write compensation during recording data based on the known relationship between bit shift which is beyond an allowable range and a pattern of a data bit string of a data signal. A write amplifier converts the write-compensated data signal into an electrical signal by using the write compensator so as to suppress the bit shift, and supplies it to a write head.
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