Patent ID: 7848042
Filing Date: 2010-12-07
Classification: G11B

Abstract:
1. A method of removing magneto-resistive asymmetry (MRA) from a signal, including: using a processor to determine an estimated offset error which is an estimate of the error due to offset in the signal, including by determining the estimated offset error using those portions of the signal where the magnitude of the signal is less than a first threshold and excluding at least some portion of the signal where the magnitude of the signal is greater than the first threshold from the determination of the estimated offset error; using the processor to determine an estimated signal error which is an estimate of the combined error due to offset combined with MRA in the signal, including by determining the estimated signal error using those portions of the signal where the magnitude of the signal is greater than a second threshold and excluding at least some portion of the signal where the magnitude of the signal is less than the second threshold from the determination of the estimated signal error; and removing at least a portion of MRA, using the processor, from the signal based at least in part on the estimated offset error and the estimated signal error, including by subtracting the estimated offset error from the estimated signal error to obtain an estimated MRA error.