Device and signal processing circuit for magnetic recording, magnetic recording apparatus
AssigneeHitachi Global Storage Technologies Japan, Ltd.
InventorsHideki Sawaguchi, Yasutaka Nishida, Hisashi Takano, Toru Matsushita
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Abstract
A magnetic recording/reproducing apparatus includes a partial-response equalization circuit having frequency characteristic of cutting off low-frequency signal components inclusive of DC components; and a maximum-likelihood decoder, in which a reproduced signal outputted from the reproducing head is processed by the partial-response equalization circuit and then inputted into the maximum-likelihood decoder to be data-reproduced, thereby reducing a noise and distortion on the reproduced signal and reducing a data detection error rate.
Claims2
A magnetic recording/reproducing apparatus using a perpendicular magnetic recording double-layer film medium with a soft underlayer and a reproducing head constituted by a magneto-resistive effect head with a shield film, said apparatus comprising a partial-response equalization circuit having frequency characteristic of cutting off low-frequency signal components inclusive of DC components, and a maximum-likelihood decoder, wherein a reproduced signal outputted from said reproducing head is processed by said partial-response equalization circuit and then inputted into said maximum-likelihood decoder to be data-reproduced.
2-14. (canceled)
Dependencies are inferred from the claim text.