Asymmetry correction in read signal

Details Asymmetry correction in read signal Asymmetry correction in read signal

2007-11-20

2007-11-20

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

C360S046000

Reexamination Certificate

active

10976110

ABSTRACT:
Systems and techniques relating to interpreting signals on a channel having an asymmetrical signal amplitude response. A signal processor, such as a read channel transceiver device usable in a magnetic recording system, includes an asymmetry correction circuit configured to receive an analog signal and to compensate for asymmetry in the received analog signal, a signal equalizer configured to receive an input signal responsive to an output of the asymmetry correction circuit and to generate an equalized signal, a discrete time sequence detector operable to examine the equalized signal, and a control circuit that provides a coefficient adjustment to the asymmetry correction circuit to affect the asymmetry compensation based on an estimate of non-linearity derived from the equalized signal and an output of the discrete time sequence detector. The estimate can be a least mean squared estimate of the non-linearity in the equalized signal.

REFERENCES:
patent: 5585975 (1996-12-01), Bliss
patent: 5790335 (1998-08-01), Sugawara et al.
patent: 5999355 (1999-12-01), Behrens et al.
patent: 6043943 (2000-03-01), Rezzi et al.
patent: 6141167 (2000-10-01), Nishida et al.
patent: 6400518 (2002-06-01), Bhaumik et al.
patent: 6449110 (2002-09-01), DeGroat et al.
patent: 6493403 (2002-12-01), Ashley et al.
patent: 6519103 (2003-02-01), Cyrusian
patent: 6519106 (2003-02-01), Goh et al.
patent: 6529340 (2003-03-01), Gowda et al.
patent: 6587292 (2003-07-01), Ashley et al.
patent: 6597650 (2003-07-01), Katakura et al.
patent: 6600615 (2003-07-01), Ashley et al.
patent: 6678110 (2004-01-01), Ellis
patent: 6693863 (2004-02-01), Shoji et al.
patent: 6714603 (2004-03-01), Ashley et al.
patent: 6735724 (2004-05-01), McClellan
patent: 7012772 (2006-03-01), Vis
patent: 7061848 (2006-06-01), Shim
patent: 7092180 (2006-08-01), Franck
patent: 2005/0180298 (2005-08-01), Horibe et al.
U.S. Appl. No. 11/092,095, filed Mar. 28, 2005, Ke Han.

Affiliated with

Also associated with

Rating

Asymmetry correction in read signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Asymmetry correction in read signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymmetry correction in read signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3861692