Back to results
US 7,990,648 B1Granted
Disk drive margining read channel using predictable disturbance samples generated as a function of a written pattern
AssigneeWestern Digital Technologies, Inc.
InventorAlvin J. Wang
Life of this patent
Estimating the term…
Abstract
A disk drive is disclosed comprising a head actuated over a disk having a plurality of tracks. A pattern is read from the disk to generate a read signal, and the read signal is sampled to generate read samples. Predictable disturbing samples are generated as a function of the pattern. The predictable disturbing samples are added to the read samples to generate disturbed samples, and a data sequence is detected from the disturbed samples.
Claims24
A disk drive comprising:
- a disk comprising a plurality of tracks;
- a head actuated over the disk;
- and
- control circuitry operable to:
- read a pattern from the disk to generate a read signal;
- sample the read signal to generate read samples;
- generate predictable disturbing samples as a function of the pattern;
- add the predictable disturbing samples to the read samples to generate disturbed samples;
- and
- detect a data sequence from the disturbed samples.
7 more elements
A method of operating a disk drive comprising a head actuated over a disk including a plurality of tracks, the method comprising:
- reading a pattern from the disk to generate a read signal;
- sampling the read signal to generate read samples;
- generating predictable disturbing samples as a function of the pattern;
- adding the predictable disturbing samples to the read samples to generate disturbed samples;
- and
- detecting a data sequence from the disturbed samples.
3 more elements
Dependencies are inferred from the claim text.