Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Reexamination Certificate
2005-10-03
2009-02-24
Feild, Joseph H (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
C360S067000, C714S746000
Reexamination Certificate
active
07495854
ABSTRACT:
Provided is a dynamic method for asymmetry compensation in a storage read channel. An asymmetry cancellation component in communication with an analog-to-digital converter receives an analog signal representing data read from a storage medium by a read head. The asymmetry cancellation component receives a digital signal from the analog-to-digital converter representing data read from the storage medium and computes an error signal indicating an asymmetry in the digital signal. The computed error signal is used to determine a coefficient. The digital signal is adjusted using the coefficient to produce a corrected digital signal.
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Document from China Patent Office dated Nov. 7, 2008 citing prior art.
Eleftheriou Evangelos S.
Hutchins Robert Allen
Oelcer Sedat
Feild Joseph H
International Business Machines - Corporation
Konrad Raynes & Victor LLP
Negrón Daniell L
Victor David W.
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