Method and apparatus for data reproducing in a disk drive

Details Method and apparatus for data reproducing in a disk drive Method and apparatus for data reproducing in a disk drive

2006-03-07

2006-03-07

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

C360S069000, C360S031000, C360S055000, C360S053000, C360S025000

Reexamination Certificate

active

07009792

ABSTRACT:
A perpendicular magnetic recording type of disk drive having function of removing a component of a shift in a base line of a reproducing signal is to be disclosed. The disk drive has a read channel including an extracting unit which extracts the component of the shift in the base line of the reproducing signal. The extracting unit includes low-pass filters, and parameters of a lower cut-off frequency of the low-pass filter are adjusted in read operation.

REFERENCES:
patent: 4656533 (1987-04-01), Sakai et al.
patent: 4772964 (1988-09-01), Kaida
patent: 5396375 (1995-03-01), Nagase et al.
patent: 5995313 (1999-11-01), Dakroub
patent: 5999348 (1999-12-01), Dakroub
patent: 6078453 (2000-06-01), Dziallo et al.
patent: 6091560 (2000-07-01), Du
patent: 6178053 (2001-01-01), Narita
patent: 6501611 (2002-12-01), Li
patent: 6621649 (2003-09-01), Jiang et al.
patent: 2002/0089773 (2002-07-01), Shimomura et al.
patent: 1 003 155 (2000-05-01), None
patent: 04-286702 (1992-10-01), None
patent: 04-372774 (1992-12-01), None
patent: 07-225901 (1995-08-01), None
patent: 11-120702 (1999-04-01), None
patent: 2001-266301 (2001-09-01), None
patent: 2002-133604 (2002-05-01), None
Ho, et al., “Data Storage and Retrieval Using Perpendicular Media and Magnetoresistive Read Transducer”, Jul. 1997, IEEE Transactions on Magnetics, vol. 33, No. 4, pp. 2538-2542.
Austrian Search Report for Appln. No. 200304986-3, dated Jun. 18, 2004.
Japanese Office Action dated May 31, 2005 for Appln. No. 2002-288909.

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