Systems and methods for compensating baseline wandering in...

Details Systems and methods for compensating baseline wandering in... Systems and methods for compensating baseline wandering in...

2008-09-19

2010-10-26

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

C360S039000, C360S065000

Reexamination Certificate

active

07821730

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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patent: 6775529 (2004-08-01), Roo
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patent: 2007/0104300 (2007-05-01), Esumi et al.
patent: 2008/0212715 (2008-09-01), Chang
patent: 2008/0266693 (2008-10-01), Bliss et al.

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