Frequency domain approach for efficient computation of...

Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing

Reexamination Certificate

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C375S232000

Reexamination Certificate

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07924523

ABSTRACT:
Various embodiments of the present invention provide systems and methods for equalizing an input signal. For example, various embodiments of the present invention provide a method for performing equalization in a storage device. Such methods include providing an equalizer circuit that is governed by a target value, and a filter circuit that is governed by a filter coefficient. An initial value is provided to the equalizer circuit as the target value, and an overall target based at least in part on the initial value and the filter coefficient is calculated. An updated value is calculated based on the overall target, and the updated value is provided to the equalizer circuit as the target value.

REFERENCES:
patent: 5262904 (1993-11-01), Tang et al.
patent: 5357520 (1994-10-01), Arnett et al.
patent: 5493454 (1996-02-01), Ziperovich et al.
patent: 5517146 (1996-05-01), Yamasaki
patent: 5583705 (1996-12-01), Ziperovich et al.
patent: 5781358 (1998-07-01), Hasegawa
patent: 5986830 (1999-11-01), Hien
patent: 5999355 (1999-12-01), Behrens et al.
patent: 6043942 (2000-03-01), Cunningham et al.
patent: 6091560 (2000-07-01), Du
patent: 6130794 (2000-10-01), Christensen
patent: 6134691 (2000-10-01), Hirasaka
patent: 6141168 (2000-10-01), Takahashi et al.
patent: 6147828 (2000-11-01), Bloodworth et al.
patent: 6181505 (2001-01-01), Sacks et al.
patent: 6208481 (2001-03-01), Spurbeck et al.
patent: 6212024 (2001-04-01), Igarashi et al.
patent: 6243031 (2001-06-01), Jusuf et al.
patent: 6246723 (2001-06-01), Bliss et al.
patent: 6337778 (2002-01-01), Gagne
patent: 6396651 (2002-05-01), Grover
patent: 6404572 (2002-06-01), Hong
patent: 6535345 (2003-03-01), Shimoda
patent: 6563655 (2003-05-01), Yamasaki et al.
patent: 6621648 (2003-09-01), Elliot et al.
patent: 6662303 (2003-12-01), Toosky et al.
patent: 6671244 (2003-12-01), Honma
patent: 6674590 (2004-01-01), Ottesen et al.
patent: 6678230 (2004-01-01), Miyashita et al.
patent: 6721114 (2004-04-01), Sutardja et al.
patent: 6788481 (2004-09-01), Fang et al.
patent: 6894854 (2005-05-01), Carlson et al.
patent: 6912682 (2005-06-01), Aoki
patent: 6934100 (2005-08-01), Ueno
patent: 6937415 (2005-08-01), Galbraith et al.
patent: 7012772 (2006-03-01), Vis
patent: 7079342 (2006-07-01), Han et al.
patent: 7092179 (2006-08-01), Yamanouchi
patent: 7123429 (2006-10-01), Musungu et al.
patent: 7126773 (2006-10-01), Taratorin
patent: 7193802 (2007-03-01), Cideciyan et al.
patent: 7248424 (2007-07-01), Ueno
patent: 7256954 (2007-08-01), Serizawa
patent: 7262928 (2007-08-01), Oberg
patent: 7271753 (2007-09-01), Padukone et al.
patent: 7308057 (2007-12-01), Patapoutian
patent: 7440224 (2008-10-01), Ehrilich et al.
patent: 7495854 (2009-02-01), Hutchins et al.
patent: 7542227 (2009-06-01), Che et al.
patent: 7715135 (2010-05-01), Sutardja et al.
patent: 7733591 (2010-06-01), Bottemiller et al.
patent: 2002/0159350 (2002-10-01), Ogura
patent: 2003/0048564 (2003-03-01), Koller et al.
patent: 2005/0117243 (2005-06-01), Serizawa et al.
patent: 2006/0061496 (2006-03-01), Stein et al.
patent: 2006/0062125 (2006-03-01), Horie et al.
patent: 2006/0176947 (2006-08-01), Lim
patent: 2007/0041115 (2007-02-01), Lee
patent: 2007/0047120 (2007-03-01), DeGroat
patent: 2007/0076313 (2007-04-01), Hutchins et al.
patent: 2007/0140088 (2007-06-01), Hino et al.
patent: 2008/0031114 (2008-02-01), Hong et al.
patent: 2008/0037153 (2008-02-01), Yoshizawa
patent: 2008/0081382 (2008-04-01), Yang et al.
patent: 2009/0103413 (2009-04-01), Matsui et al.
patent: 2 320 866 (1997-06-01), None
U.S. Appl. No. 12/199,325, filed Aug. 27, 2008, Mathew.
U.S. Appl. No. 12/247,378, filed Oct. 8, 2008, Mathew.
Cho and Lee, “An Estimation Technique for Nonlinear Distortion in High Density Magnetic Recording Channels”, IEEE Transactions on Magnetics, vol. 34, No. 1, pp. 40-44 Jan. 1998.
DeGroat et al., “Experimental Characterization of Media Noise Based on Equalized Synchronized Drive Data”, IEEE Trans. Magnetics, vol. 37, No. 2, pp. 633-638, Mar. 2001.
Farhang-Boroujeny, Adaptive Filters: Theory and Applications. John Wiley & Sons Ltd, 1998, Chapter 11. pp. 373-379.
Kavcic and Patapoutian, “A Signal-Dependent Autoregressive Channel Model”, IEEE Trans. Magnetics, vol. 35 No. 5, pp. 2316-2318, Sep. 1999.
Lin et al. “An estimation technique for accurately modelling the magnetic recording channel including nonlinearities.” IEEE Trans. Mag, vol. 25, No. 5, pp. 4084-4086, Sep. 1989.
Moon, J., “Signal-to-Noise Ratio Definition for Magnetic Recording Channels With Transition Noise”, IEEE Trans. Magnetics, vol. 36, No. 5, pp. 3881-3883, Sep. 2000.
Palmer et al, “Identification of nonlinear write effects using pseudo-random sequences” IEEE Trans. Magnetics, vol. 23 No. 5, pp. 2377-2379, Sep. 1987.
Partovi; et al., “Flow-Through Latch and Edge-Triggered Flip-Flop Hybrid Elements”; Feb. 8, 1996; pp. 138-139; Solid-State Circuits Conference Digest of Technical Papers.
Tokumasu et al. “A New Reduced Clock-Swing Flip-Flop (NDKFF),” Corporate Research & Development Center, Toshiba Corp. IEEE Feb. 2002 Custom lntergrated Circuits Conference.
Wood and Donaldson, “The Helical-Scan Magnetic Tape Recorder as a Digital Communication Channel”, IEEE Transactions on Magnetics, vol. MAG-15, No. 2, pp. 935-943 Mar. 1979.

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