Two dimensional magnetic recording head separation calculator
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsScott Dziak, Xiao Ma, Lu Pan, Zhi Bin Li, Haitao Xia
Life of this patent
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Abstract
A method for calculating an average phase offset in a two dimensional magnetic recording system includes calculating a phase offset as a difference between a phase of a first signal derived from a first read head and a second phase of a second signal derived from a second read head, correcting for phase wrapping differences between the phase offset and a previous phase offset, determining whether the phase offset is consistent with the previous phase offset, and calculating an average phase offset which includes the phase offset only if it is consistent with the previous phase offset.
Claims20
A storage system comprising:
- a magnetic storage medium;
- a magnetic sensor comprising an array of read heads configured to read a data track on the magnetic storage medium;
- and
- a head separation calculation circuit configured to calculate a phase offset between signals from a first and a second of the read heads in the array of read heads based on phase estimates for the signals, wherein the head separation calculation circuit is configured to correct for phase wrapping differences between the signals.
A method for calculating an average phase offset in a two dimensional magnetic recording system, comprising:
- calculating a phase offset as a difference between a phase of a first signal derived from a first read head and a second phase of a second signal derived from a second read head;
- correcting for phase wrapping differences between the phase offset and a previous phase offset;
- determining whether the phase offset is consistent with the previous phase offset;
- and
- calculating an average phase offset which includes the phase offset only if it is consistent with the previous phase offset.
A storage device, comprising:
- a magnetic storage medium;
- an array reader disposed in relation to the storage medium and operable to read and write data on the storage medium;
- and
- a head separation calculation circuit operable to calculate an average phase offset between signals from read heads in the array reader, the head separation calculation circuit comprising:
- means for calculating a phase offset as a difference between a phase of a first signal derived from a first read head in the array reader and a second phase of a second signal derived from a second read head in the array reader;
- means for correcting for phase wrapping differences between the phase offset and a previous phase offset;
- means for determining whether the phase offset is consistent with the previous phase offset;
- and
- means for calculating an average phase offset which includes the phase offset only if it is consistent with the previous phase offset.
Dependencies are inferred from the claim text.