Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Reexamination Certificate
2007-02-06
2007-02-06
Young, Wayne (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
C360S025000, C360S039000, C360S065000, C360S029000, C375S262000, C375S265000, C375S341000, C714S794000, C714S795000, C714S799000
Reexamination Certificate
active
10683646
ABSTRACT:
An apparatus for providing data dependent detection in a data read channel is disclosed. Parameters in a read channel are dynamically adjusted according to data dependent noise. For example, a comparison in an add-compare-select (ACS) unit of a Viterbi decoder may be adjusted or offset terms in error event filters may be biased to choose a Viterbi sequence with more transitions or to compensate for polarity dependent noise.
REFERENCES:
patent: 5809080 (1998-09-01), Karabed et al.
patent: 5961658 (1999-10-01), Reed et al.
patent: 6104766 (2000-08-01), Coker et al.
patent: 6148431 (2000-11-01), Lee et al.
patent: 6158027 (2000-12-01), Bush et al.
patent: 6201839 (2001-03-01), Kavcic et al.
patent: 6219387 (2001-04-01), Glover
patent: 6320916 (2001-11-01), Kobayashi et al.
patent: 6373906 (2002-04-01), Cideciyan et al.
patent: 6396254 (2002-05-01), Feyh et al.
patent: 6460150 (2002-10-01), Cideciyan et al.
patent: 6513141 (2003-01-01), Livingston
patent: 6546518 (2003-04-01), Leung et al.
patent: 6594094 (2003-07-01), Rae et al.
patent: 6717461 (2004-04-01), Krishnapura et al.
patent: 6732328 (2004-05-01), McEwen et al.
patent: 6889154 (2005-05-01), Ashley et al.
patent: 2002/0040462 (2002-04-01), Sawaguchi et al.
patent: 2004/0032683 (2004-02-01), Ashley et al.
patent: WO 00/33500 (1999-12-01), None
Cideciyan Roy D.
Dholakia Ajay
Eleftheriou Evangelos
Galbraith Richard L.
Mittelholzer Thomas
Chambliss Bahner & Stophel PC
Hitachi Global Storage Technologies - Netherlands B.V.
Lynch, Esq. David W.
Mercedes Dismery
Young Wayne
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