Mr head read signal preconditioning circuitry

G - Physics – 11 – B

Patent

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Details

G11B 5/39 (2006.01) G11B 5/012 (2006.01) G11B 5/02 (2006.01) G11B 5/027 (2006.01) G11B 5/035 (2006.01) G11B 5/09 (2006.01) G11B 19/20 (2006.01) G11B 20/10 (2006.01) G11B 5/00 (2006.01)

Patent

CA 2222178

The present invention relates to circuitry for processing an analog read signal, such as a signal produced by a magnetoresistive head (18), in a magnetic data storage system. The circuitry processes an analog read signal before the signal reaches an analog to digital converter (54). In one embodiment, the invention comprises circuitry (44) for equalizing the amplitudes of the positive and negative pulses in the analog read signal. In another embodiment, the invention comprises circuitry (42) for reducing the baseline shift of the analog read signal. The invention may be used in magnetic data storage systems using any conventional data detection method.

La présente invention se rapporte à des circuits de traitement d'un signal de lecture analogique, tel qu'un signal généré par une tête magnétorésistive (18), dans un système magnétique de stockage de données. Les circuits traitent un signal de lecture analogique avant que le signal atteigne un convertisseur analogique-numérique (54). Selon un mode de réalisation, l'invention comprend des circuits (44) servant à égaliser les amplitudes des impulsions positives et négatives du signal de lecture analogique. Selon un autre mode de réalisation, l'invention comprend des circuits (42) servant à réduire le décalage de la ligne de base du signal de lecture analogique. L'invention peut être utilisée dans des systèmes magnétiques de stockage de données faisant appel à tout procédé conventionnel de détection de données.

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