Cross-talk measurement in array reader magnetic recording system
AssigneeLSI Corporation
InventorsTravis Oenning, Ross S. Wilson, David W. Kelly, Jason S. Goldberg
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Abstract
An apparatus for measuring cross-talk in an array reader magnetic storage system includes an array reader with multiple read heads operable to read data from a magnetic storage medium, a first preamplifier connected to a first read head, a second preamplifier connected to a second read head, and a cross-talk measurement circuit connected to the first preamplifier and to the second preamplifier, operable to measure cross-talk between a first signal from the first read head and a second signal from the second read head.
Claims20
An apparatus comprising:
- an array reader comprising a plurality of read heads operable to read data from a magnetic storage medium;
- a first preamplifier connected to a first read head in the plurality of read heads;
- a second preamplifier connected to a second read head in the plurality of read heads;
- and
- a cross-talk measurement circuit connected to the first preamplifier and to the second preamplifier, operable to measure cross-talk between a first signal from the first read head and a second signal from the second read head based on the first signal and on the second signal while one of the read heads is driven and a remainder of the plurality of read heads in the array reader are not driven.
A method for measuring cross-talk in an array reader magnetic recording system, comprising:
- driving a first read head in a plurality of read heads in an array reader while a remainder of the plurality of read heads in the array reader are not driven;
- reading an analog signal from the array reader;
- amplifying the analog signal;
- digitizing the amplified analog signal to yield digital samples;
- and
- calculating a cross-talk between the plurality of read heads based at least in part on the digital samples.
A storage device, comprising:
- a magnetic storage medium operable to store data;
- a head assembly disposed in relation to the storage medium and comprising an array reader with a plurality of read heads to read and write the data on the storage medium;
- a first preamplifier connected to a first read head in the plurality of read heads;
- a second preamplifier connected to a second read head in the plurality of read heads;
- and
- a cross-talk measurement circuit connected to the first preamplifier and to the second preamplifier, operable to measure cross-talk between a first signal from the first read head and a second signal from the second read head based on the first signal and on the second signal while one of the read heads is driven and a remainder of the plurality of read heads are not driven.
Dependencies are inferred from the claim text.