Dynamic magnetic information storage or retrieval – General processing of a digital signal – Pulse crowding correction
Reexamination Certificate
2008-08-27
2010-12-28
Negrón, Daniell L (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Pulse crowding correction
C360S039000, C360S046000, C360S068000
Reexamination Certificate
active
07859780
ABSTRACT:
Various embodiments of the present invention provide systems and methods for write pre-compensation. For example, various embodiments of the present invention provide systems for on-the-fly estimation of write pre-compensation values. Such systems include a magnetic storage medium, a read/write head assembly disposed in relation to the magnetic storage medium, and an analog to digital converter that receives an analog signal from the read/write head assembly corresponding to a data set stored on the magnetic storage medium and provides a series of digital samples corresponding to the data set. The storage devices further include a read data processing circuit that receives the same series of digital samples and provides a user data output, and a pre-compensation value calculation circuit that receives the series of digital samples and provides an updated write pre-compensation value.
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Lee Yuan Xing
Mathew George
Song Hongwei
Agere Systems Inc.
Hamilton DeSanctis & Cha
Holder Regina N
Negrón Daniell L
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