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US 9,286,933 B2Granted
Systems and methods for controlled data processor operational marginalization
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsGeorge Mathew, Haotian Zhang, Haitao Xia, Bruce Wilson
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Abstract
Systems, methods, devices, circuits for data processing, and more particularly to data processing including operational marginalization capability. In one case a data processing system is disclosed that includes a loop detector circuit and a sample based noise injection circuit. The loop detector circuit applies a loop detection algorithm to a data input to yield a loop detected output, and the sample based noise injection circuit generates a noise component based at least in part on the loop detected output.
Claims19
A storage device, the storage device comprising:
- a storage medium;
- a head assembly disposed in relation to the storage medium and operable to provide a sensed signal corresponding to a data set on the storage;
- a read channel circuit including:
- an analog front end circuit operable to provide an analog signal corresponding to the sensed signal;
- an analog to digital converter circuit operable to sample the analog signal to yield a series of digital samples;
- an equalizer circuit operable to equalize the digital samples corresponding to the data set to yield a sample set;
- a loop detector circuit operable to apply a loop detection algorithm to the sample set to yield a loop detected output;
- a sample based noise injection circuit operable to:
- generate a noise component based at least in part on the loop detected output;
- add the noise component to the sample set to yield a noise injected output;
- and
- select one of the sample set and the noise injected output as a processing input;
- wherein the sample based noise injection circuit includes:
- a selector circuit operable to select between a zero value and the noise component as a noise additive;
- and
- a summation circuit operable to add the data input to the noise component to yield the processing input;
- and
- a processing circuit operable to apply a data processing algorithm to the processing input to yield a data output.
15 more elements
A data processing system, the data processing system comprising:
- a sample based noise injection circuit operable to:
- generate a noise component based at least in part on the loop detected output;
- add the noise component to the data input to yield a noise injected output;
- and
- select one of the data input and the noise injected output to provide as a processing input;
- wherein the sample based noise injection circuit includes:
- a selector circuit operable to select between a zero value and the noise component as a noise additive;
- and
- a summation circuit operable to add the data input to the noise component to yield the processing input;
- and
- a processing circuit operable to apply a data processing algorithm to the processing input to yield a data output.
8 more elements
A data processing system, the data processing system comprising:
- a loop detector circuit operable to apply a loop detection algorithm to a reduced resolution equalized output derived from an equalized output to yield a loop detected output;
- a sample based noise injection circuit operable to:
- generate a noise component based at least in part on the loop detected output;
- add the noise component to an aligned version of the equalized output to yield a noise injected output;
- and
- select one of the aligned version of the equalized output or the noise injected output to provide as a processing input;
- a resolution modification circuit operable to reduce a resolution of the processing input to yield a resolution reduced input, such that the resolution of the processing input is greater than the resolution of the resolution reduced input;
- and
- a processing circuit operable to apply a data processing algorithm to the resolution reduced input derived from the processing input to yield a data output.
6 more elements
A method for data processing, the method comprising:
- receiving a data input, wherein the data input is derived from an equalized output;
- applying a loop detection algorithm to the data input to yield a loop detected output;
- generating a noise component based at least in part on the loop detected output;
- selecting one of the noise component and a zero component as a sum input;
- adding the sum input to an aligned version of the equalized output to yield a selectively noise injected output;
- reducing a resolution of the selectively noise injected output to yield a resolution reduced input, such that the resolution of the equalized output is greater than the resolution of the resolution reduced input;
- and
- processing the resolution reduced input to yield a data output.
5 more elements
Dependencies are inferred from the claim text.