Apparatus, signal-processing circuit and device for magnetic recording system

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United States of America Patent

PATENT NO 8144415
APP PUB NO 20110013306A1
SERIAL NO

12923307

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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To effectively suppress a signal in a low frequency region in which the medium noise and the signal distortion are concentrated, and in order to effectively utilize a detected component of the reproduced signal in the low frequency region, a target of partial response equalization to the perpendicularly recorded/reproduced signal is set so that the low-frequency component around the direct current is suppressed to a regulated quantity for both the effective suppression and the effective utilization. Accordingly, a maximum-likelihood decoding process is carried out through the target of partial response equalization. Reliability of data detection is made higher and a signal-to-noise ratio is improved, so that the noise from the recording medium can be reduced more and it is possible to provide a high-density magnetic recording/reproducing apparatus.

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Patent Owner(s)

Patent OwnerAddress
WESTERN DIGITAL TECHNOLOGIES INC5601 GREAT OAKS PARKWAY SAN JOSE CA 95119

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nishida, Yasutaka Kodaira, JP 113 1203
Sawaguchi, Hideki Kokubunji, JP 48 807
Takano, Hisashi Kodaira, JP 118 1606
Tsuchinaga, Hiroyuki Kodaira, JP 32 780

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