Method of controlling a filter coefficient of a continuous...

Details Method of controlling a filter coefficient of a continuous... Method of controlling a filter coefficient of a continuous...

2010-04-05

2011-11-01

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

Reexamination Certificate

active

08049981

ABSTRACT:
A method of controlling a filter coefficient of a continuous time filter of a data storage device is provided. The method of controlling filter coefficient includes positioning a magnetic head at a first reference height from surface of a magnetic disk and outputting a plurality of CSM values by measuring a channel state from a read signal output from the magnetic head when changing a cut-off frequency of the continuous time filter, positioning the magnetic head at a second reference height spaced from the first reference height and measuring a bit error ratio from a read signal output from the magnetic head positioned at the second reference height according to at least one CSM value selected among a plurality of CSM values, and controlling a filter coefficient value to determine a cut-off frequency of the continuous time filter according to a measured bit error ratio.

REFERENCES:
patent: 5831888 (1998-11-01), Glover
patent: 5862157 (1999-01-01), Bessios
patent: 5995305 (1999-11-01), McNeil et al.
patent: 6108153 (2000-08-01), Glover
patent: 6108554 (2000-08-01), Kawamoto
patent: 6414806 (2002-07-01), Gowda et al.
patent: 6862152 (2005-03-01), Wu et al.
patent: 7097110 (2006-08-01), Sheperek et al.
patent: 7561358 (2009-07-01), Wang
patent: 2006/0222897 (2006-10-01), Kamata et al.
patent: 2009/0256557 (2009-10-01), Kiyono et al.
patent: 2001-338476 (2001-12-01), None
patent: 2002-298506 (2002-10-01), None
patent: 10-594328 (2006-06-01), None

Affiliated with

Also associated with

Rating

Method of controlling a filter coefficient of a continuous... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of controlling a filter coefficient of a continuous..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of controlling a filter coefficient of a continuous... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4279937