Dynamic information storage or retrieval – Binary pulse train information signal – Including sampling or a/d converting
Reexamination Certificate
2008-05-27
2008-05-27
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
Including sampling or a/d converting
C369S053190
Reexamination Certificate
active
11012066
ABSTRACT:
A disk apparatus has an equalizing unit which performs PR equalization for the read signal from the disk based on a plurality of tap coefficients, a decoding unit which performs a decoding process for the equalized read signal, a calculating unit which obtains an ideal signal of the decoded read signal, and compares the ideal signal with the decoded read signal, thereby calculating an error signal E, and a control unit which groups the tap coefficients into at least a first and second coefficient groups which are groups of tap coefficients at symmetrical locations each, and determines tap coefficients of the first coefficient group in a range of a first limit value K1according to the calculated error signal, determines tap coefficients of the second coefficient group in a range of a second limit value and supplies the determined tap coefficients to the equalizing unit.
REFERENCES:
patent: 5546367 (1996-08-01), Yoshimura et al.
patent: 6477125 (2002-11-01), Hayami
patent: 6618338 (2003-09-01), Fujiwara et al.
patent: 6618740 (2003-09-01), Staszewski
patent: 6678230 (2004-01-01), Miyashita et al.
patent: 6876618 (2005-04-01), Tonami et al.
patent: 7184381 (2007-02-01), Ohkubo et al.
patent: 06237147 (1994-08-01), None
patent: 2001-195830 (2001-07-01), None
Journal of the Institute of Electronics, Information and Communication Engineers, vol. 81, No. 5, pp. 497-505, May 1998.
Kaneshige Toshihiko
Moro Hiroyuki
Otake Koichi
Tatsuzawa Yukiyasu
Yamakawa Hideyuki
Agustin Peter Vincent
Korzuch William
Pillsbury Winthrop Shaw & Pittman LLP
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