Systems and methods for compensating baseline wandering in perpendicular magnetic recording
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United States of America Patent
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Oct 26, 2010
Grant Date -
Mar 25, 2010
app pub date -
Sep 19, 2008
filing date -
Sep 19, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
Various embodiments of the present invention provide systems and methods for reducing low frequency loss in a magnetic storage device. For example, a data processing circuit is disclosed that includes a digital filter that receives a series of digital samples and provides a filtered output. The filtered output is provided to a data detector that performs a data detection on the filtered output to create a detected output. A first summation element subtracts the filtered output from the detected output to create an error signal, and a second summation element subtracts the error signal from the filtered output to create a wander basis signal. A baseline correction feedback circuit receives the wander basis signal and provides a wander compensation signal. A derivative of the wander compensation signal is provided as feedback to the digital filter.
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