Method and apparatus for write compensation of perpendicular...

Details Method and apparatus for write compensation of perpendicular... Method and apparatus for write compensation of perpendicular...

2005-06-07

2005-06-07

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

C360S053000

Reexamination Certificate

active

06903890

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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