Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing
Reexamination Certificate
2008-07-01
2008-07-01
Wellington, Andrea (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of equalizing
C360S051000
Reexamination Certificate
active
07394608
ABSTRACT:
A read channel and method using that read channel are disclosed. The read channel comprises an analog to digital converter which asynchronously samples at a fixed rate an analog signal formed by reading a data track, where that data track was written to a data storage medium at a symbol rate and an interpolator interconnected with the analog to digital converter. The read channel further comprises a fractionally-spaced equalizer, where the interpolator provides an interpolated signal to the fractionally-spaced equalizer at an interpolation rate, where that interpolation rate is greater than the symbol rate. The fractionally-spaced equalizer forms a synchronous equalized signal. The read channel further comprises a gain control module interconnected with the fractionally-spaced equalizer, and a sequence detector interconnected with the gain control module.
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Eleftheriou Evangelos S.
Hutchins Robert A.
Jaquette Glen A.
Jelitto Jens
Oelcer Sedat
Chandler & Udall LLP
International Business Machines - Corporation
Kapadia Varsha A.
Regelman Dale F.
Wellington Andrea
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