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Decoupling magneto-resistive asymmetry and offset loops

Image Number 2 for United States Patent #8130462.

Signal correction is performed by determining an offset error based at least in part on a first portion of a signal within a first amplitude range. The offset error is associated with error due to offset in the signal. An signal error, associated with error due to offset and magneto-resistive asymmetry (MRA) in the signal, is determined based at least in part on a second portion of the signal within a second amplitude range; the second amplitude range does not overlap with the first amplitude range. An MRA error is determined by removing the offset error from the signal error and the MRA error is removed from the signal.

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