Non-linear transition shift identification and compensation

Dynamic magnetic information storage or retrieval – General processing of a digital signal – Pulse crowding correction

Reexamination Certificate

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Reexamination Certificate

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07974032

ABSTRACT:
A system for identifying and compensating for non-linear transition shift in a magnetic medium data storage device is disclosed. The non-linear transition shift compensation system includes a non-linear transition shift estimation module adapted to generate non-linear transition shift estimates for specific bit patterns. The system further includes a pre-compensation module adapted to adjust the temporal spacing of binary transitions written to the magnetic medium based on the non-linear transition shift estimates generated by the non-linear transition shift estimation module for specific bit patterns corresponding to bit patterns appearing in the data being written to the magnetic medium.

REFERENCES:
patent: 5469462 (1995-11-01), Kahlman et al.
patent: 6212024 (2001-04-01), Igarashi et al.
patent: 7158324 (2007-01-01), Stein et al.

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