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US 9,099,132 B1Granted
Systems and methods for multi-head separation determination
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsJeffrey P. Grundvig, Richard Rauschmayer, Jin Lu
Life of this patent
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Abstract
Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for determining a down track distance between two or more read heads on a read/write head assembly.
Claims23
A method for determining separation between read heads, the method comprising:
- receiving a first data set corresponding to information received from a first read head and sampled at a sample rate;
- identifying a sector address mark in the first data set using a first detection circuit;
- receiving a second data set corresponding to information received from a second read head;
- identifying the sector address mark in the second data set using a second detection circuit and sampled at the sample rate;
- and
- calculating an integer number of periods of the sample rate within a difference between a location of the sector address mark in the first data set and a location of the sector address mark in the second data set.
3 more elements
A data processing system, the data processing system comprising:
- a first sector address mark detection circuit operable to detect the location of a sector address mark in a first data set derived from a first read head and sampled at a sample rate;
- a second sector address mark detection circuit operable to detect the location of the sector address mark in a second data set derived from a first read head and sampled at a sample rate;
- and
- an integer distance calculation circuit operable to calculate an integer number of periods of the sample rate within a difference between a location of the sector address mark in the first data set and a location of the sector address mark in the second data set.
1 more element
A hard disk drive, the hard disk drive comprising:
- a disk platter including a number of tracks each storing servo data;
- a head assembly disposed in relation to the disk platter, wherein the head assembly includes a first read head and a second read head;
- a data processing system including:
- a first sector address mark detection circuit operable to detect the location of a sector address mark in a first data set derived from a first read head and sampled at a sample rate;
- a second sector address mark detection circuit operable to detect the location of the sector address mark in a second data set derived from a first read head and sampled at a sample rate;
- an integer distance calculation circuit operable to calculate an integer number of periods of the sample rate within a difference between a location of the sector address mark in the first data set and a location of the sector address mark in the second data set.
3 more elements
Dependencies are inferred from the claim text.