Error correction via programmable bias current for mr...

G - Physics – 11 – B

Patent

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G11B 20/18 (2006.01) G11B 5/012 (2006.01) G11B 5/03 (2006.01) G11B 5/455 (2006.01) G11B 19/00 (2006.01) G11B 19/04 (2006.01) G11B 27/36 (2006.01) G11B 5/00 (2006.01) G11B 33/10 (2006.01)

Patent

CA 2223146

A data error correction procedure is disclosed for use in a disk drive that includes a magneto-resistive head. The error correction procedure increases the DC bias current applied to the read stripe of the magneto-resistive head. The increased value is predetermined for a disk drive having a particular magneto-resistive head. If conventional error correction procedures are not successful, the increased DC bias current is applied to the read stripe to reduce the bit error rate that has occurred during a read operation conducted by the disk drive.

L'invention concerne un procédé de correction d'erreurs de données qui est mis en oeuvre dans une unité de disque pourvue d'une tête magnéto-résistive. Le procédé de correction d'erreurs augmente le courant continu de polarisation appliqué à la bande de lecture de la tête magnéto-résistive. Cette valeur accrue est prédéterminée pour une unité de disque pourvue d'une tête magnéto-résistive déterminée. Si les procédés classiques de correction d'erreurs échouent, le courant continu accru de polarisation est appliqué à la bande de lecture afin de réduire le taux d'erreurs binaires produites pendant une opération de lecture effectuée par l'unité de disque.

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