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AssigneeCirrus Logic, Inc.
InventorsMark S. Spurbeck, Li Du, Trent O. Dudley, William G. Bliss, German S. Feyh, Richard T. Behrens
Estimating the term…
A sampled amplitude read channel for magnetic disk recording which asynchronously samples the analog read signal, adaptively equalizes the resulting discrete time sample values according to a target partial response, extracts synchronous sample values through interpolated timing recovery, and detects digital data from the synchronous sample values using a Viterbi sequence detector is disclosed. To minimize interference from the timing and gain control loops, the phase and magnitude response of the adaptive equalizer filter are constrained at a predetermined frequency using an optimal orthogonal projection operation as a modification to a least mean square (LMS) adaptation algorithm. Further, with interpolated timing recovery, the equalizer filter and its associated latency are removed from the timing recovery loop, thereby allowing a higher order discrete time filter and a lower order analog filter.
A sampled amplitude read channel for reading digital data from a sequence of discrete time sample values generated by sampling an analog read signal from a read head positioned over a magnetic medium, comprising:
A sampled amplitude read channel for reading digital data from a sequence of discrete time sample values generated by sampling an analog read signal from a read head positioned over a magnetic medium, comprising:
A method of reading digital data from a sequence of discrete time sample values generated by sampling an analog read signal from a read head positioned over a magnetic medium, comprising the steps of:
A sampled amplitude read channel for reading digital data from a sequence of discrete time sample values generated by sampling an analog read signal from a read head positioned over a magnetic medium, comprising:
Dependencies are inferred from the claim text.