Systems and methods for controlled data processor operational marginalization

摘要

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.

主权项

1. 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; andselect 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; anda 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.