Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Reexamination Certificate
2004-12-03
2008-09-30
Nguyen, Hoa T. (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
C360S039000, C360S065000
Reexamination Certificate
active
07430084
ABSTRACT:
Magnetic tape read channel signal values are developed employing intermediate bits of the path memory of a PRML Viterbi detector. Identification logic identifies a most likely path memory state of the PRML Viterbi detector from the path metrics of the PRML Viterbi detector. An intermediate bit sequence of the identified most likely path memory state is obtained, the intermediate bit sequence extending from an initiation point of the path memory which is intermediate the output and the input of the PRML Viterbi detector. A sample value is determined which corresponds to the obtained intermediate bit sequence.
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Eleftheriou Evangelos S.
Hutchins Robert Allen
Jaquette Glen Alan
Oelcer Sedat
Holcombe John H.
International Business Machines - Corporation
Mercedes Dismery E
Nguyen Hoa T.
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