Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1994-12-09
2000-11-21
Loomis, Paul
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 66, G11B 509
Patent
active
061511773
ABSTRACT:
An apparatus that compensates for the asymmetry and the baseline shift in the signal generated by a magnetoresistive head. The apparatus stores a first correction factor for the baseline shift, a second correction factor for correcting the amplitude of the positive portion of the signal and a third correction factor for correcting the amplitude of the negative portion of the signal. The first correction factor for correcting for baseline shift is added to the signal generated by the magnetoresistive head to generate a baseline corrected signal. The baseline corrected signal is then monitored for positive and negative excursions from the baseline and the positive excursions are multiplied by the second correction factor and the negative excursions are multiplied by the third correction factor for generating a compensated signal.
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Schwall Matthew
Shrinkle Louis J.
Davidson Dan I.
Dempster Shawn B.
Heller Edward P.
Loomis Paul
Seagate Technology Inc.
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