Dynamic magnetic information storage or retrieval – General processing of a digital signal
Reexamination Certificate
2006-02-28
2006-02-28
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
C360S078140, C360S075000, C360S051000, C360S053000, C360S031000
Reexamination Certificate
active
07006311
ABSTRACT:
Systems are provided for improving servo-demodulation robustness. The SAM pattern is searched for in a servo wedge. If the SAM pattern is detected in the first servo wedge, a determination is made whether to characterize the detection of the SAM pattern as either a good SAM detection or a bad SAM detection. If the detection of the SAM pattern is characterized as a good SAM detection, one or more channel control values (e.g., servo AGC and/or PLL values) associated with the first servo wedge are used as (or to predict) starting values when beginning to read a next servo wedge. However, if the SAM pattern is not detected, or a detection is characterized as bad, one or more previously stored or predicted channel control values are used as (or to predict) starting values when beginning to read the next servo wedge.
REFERENCES:
patent: 4188646 (1980-02-01), Sordello et al.
patent: 4271519 (1981-06-01), Hall
patent: 5050016 (1991-09-01), Squires
patent: 5170299 (1992-12-01), Moon
patent: 5255136 (1993-10-01), Machado et al.
patent: 5384671 (1995-01-01), Fisher
patent: 5420730 (1995-05-01), Moon et al.
patent: 5444583 (1995-08-01), Ehrlich et al.
patent: 5477103 (1995-12-01), Romano et al.
patent: 5544135 (1996-08-01), Akin et al.
patent: 5585975 (1996-12-01), Bliss
patent: 5586306 (1996-12-01), Romano et al.
patent: 5706265 (1998-01-01), Bang
patent: 5796535 (1998-08-01), Tuttle et al.
patent: 5903410 (1999-05-01), Blaum et al.
patent: 5963387 (1999-10-01), Son
patent: 5966258 (1999-10-01), Bliss
patent: 6021012 (2000-02-01), Bang
patent: 6108153 (2000-08-01), Glover
patent: 6111710 (2000-08-01), Feyh et al.
patent: 6115199 (2000-09-01), Bang
patent: 6122131 (2000-09-01), Jeppson
patent: 6155199 (2000-12-01), Chen et al.
patent: 6172836 (2001-01-01), Bang
patent: 6181505 (2001-01-01), Sacks et al.
patent: 6285521 (2001-09-01), Hussein
patent: 6392831 (2002-05-01), Yeo et al.
patent: 6483789 (2002-11-01), Kubota et al.
patent: 6487032 (2002-11-01), Cloke et al.
patent: 6504663 (2003-01-01), Hirano et al.
patent: 6525615 (2003-02-01), Masenas et al.
patent: 6545836 (2003-04-01), Ioannou et al.
patent: 6549580 (2003-04-01), Kang
patent: 6594103 (2003-07-01), Despain et al.
patent: 6678110 (2004-01-01), Ellis
patent: 6680807 (2004-01-01), She et al.
patent: 6754019 (2004-06-01), Tokizono et al.
patent: 6760173 (2004-07-01), Kuki et al.
patent: 6798594 (2004-09-01), Belser
patent: 6816013 (2004-11-01), Kao
patent: 6876511 (2005-04-01), Koyanagi
patent: 6943981 (2005-09-01), Ehrlich
patent: 2003/0026017 (2003-02-01), Chong et al.
patent: 2003/0026363 (2003-02-01), Stoter et al.
patent: 2004/0125481 (2004-07-01), Ehrlich
patent: 2004/0125482 (2004-07-01), Ehrlich
patent: 2004/0125483 (2004-07-01), Ehrlich
patent: 2004/0125484 (2004-07-01), Ehrlich
patent: 2004/0125485 (2004-07-01), Ehrlich
patent: 2005/0013026 (2005-01-01), Ehrlich
patent: 2005/0013027 (2005-01-01), Ehrlich
patent: 2005/0013030 (2005-01-01), Ehrlich
patent: 2005/0013031 (2005-01-01), Ehrlich
patent: 2005/0063087 (2005-03-01), Ehrlich
patent: 2005/0063088 (2005-03-01), Ehrlich
Abramovitch et al., “Customizable Coherent Servo Demodulation for Disk Drives,” Sep. 1998, IEEEE/ASME Transactions on Mechatronics, vol. 3, No. 3, pp. 184-193.
Fliesler & Meyer LLP
Hudspeth David
Matsushita Electric Industrial Co. Ltd
Mercedes Dismery
LandOfFree
Systems for preventing channel control values from being... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems for preventing channel control values from being..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems for preventing channel control values from being... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3701229