Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2004-10-29
2008-12-02
Ghayour, Mohammad H (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S229000, C375S230000, C375S232000, C369S059160, C369S059220
Reexamination Certificate
active
07460627
ABSTRACT:
A data reproduction device for equalizing a reproduced digital signal. A signal reproduced using a reproduction head is sequentially processed by an analogue filter, an A/D, and an interpolator before being supplied to a digital equalizer. The digital equalizer digitally equalizes an input digital signal to output to a subsequent Viterbi decoder, or the like. The digital equalizer comprises a variable BPF, and a variable FIR filter, and the filtering characteristic is variably adjusted.
REFERENCES:
patent: 4489353 (1984-12-01), Inami et al.
patent: 4785411 (1988-11-01), Thompson et al.
patent: 5121364 (1992-06-01), O'Donnell
patent: 5252905 (1993-10-01), Wills et al.
patent: 5682125 (1997-10-01), Minuhin et al.
patent: 5854717 (1998-12-01), Minuhin
patent: 6385239 (2002-05-01), Okamoto et al.
patent: 6671244 (2003-12-01), Honma
patent: 2001/0009608 (2001-07-01), Tanaka et al.
patent: 2004/0114912 (2004-06-01), Okamoto et al.
patent: 5128729 (1993-05-01), None
patent: 9-198799 (1997-07-01), None
patent: 9185871 (1997-07-01), None
patent: 2000-200462 (2000-07-01), None
patent: 2001-209902 (2001-08-01), None
English Patent Abstract of 2001-209902 from esp@cenet.
Notice of Grounds for Rejection issued in Japanese Patent Application No. 2003-373520 dated Jan. 15, 2008 and the English translation (4 pages).
Japanese Office Action for Japanese Application No. 2003-373520, mailed on Apr. 1, 2008 with partial English translation (3 pages).
esp@cenet patent abstract for Japanese Publication No. 2000200462, Publication date Jul. 18, 2000 (1 page).
esp@cenet patent abstract for Japanese Publication No. 9198799, Publication date Jul. 31, 1997 (1 page).
Ghayour Mohammad H
Malek Leila
Osha•Liang LLP
Sanyo Electric Co,. Ltd.
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