Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2011-01-04
2011-01-04
Sniezek, Andrew L (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S031000, C360S077020, C360S078040
Reexamination Certificate
active
07864482
ABSTRACT:
A disk drive is disclosed comprising a disk, a head, a voice coil motor (VCM) for actuating the head over the disk, and control circuitry comprising a notch filter for generating a VCM control signal, wherein a notch of the notch filter comprises a frequency, a width, and a depth. The notch filter is calibrated by initializing at least one of the width and the depth of the notch, measuring a quality metric of the notch filter, and increasing at least one of the width and the depth of the notch until the quality metric indicates good performance.
REFERENCES:
patent: 5325247 (1994-06-01), Ehrlich et al.
patent: 5680272 (1997-10-01), Kadlec et al.
patent: 6122125 (2000-09-01), Clare et al.
patent: 6219196 (2001-04-01), Semba et al.
patent: 6246536 (2001-06-01), Galloway
patent: 6567230 (2003-05-01), Kagami et al.
patent: 6574065 (2003-06-01), Sri-Jayantha et al.
patent: 6741914 (2004-05-01), Tze Ming Pang
patent: 6765749 (2004-07-01), Galloway et al.
patent: 6847502 (2005-01-01), Codilian
patent: 6930853 (2005-08-01), Settje et al.
patent: 6958881 (2005-10-01), Codilian et al.
patent: 7009803 (2006-03-01), Sharma et al.
patent: 7016142 (2006-03-01), Jung et al.
patent: 7023646 (2006-04-01), Bahirat
patent: 7031096 (2006-04-01), Kisaka
patent: 7248428 (2007-07-01), Kim et al.
patent: 2002/0093754 (2002-07-01), Zhang et al.
patent: 2007/0019321 (2007-01-01), Kim et al.
US 6,987,629, 01/2006, Fulkerson et al. (withdrawn)
Babinski Alexander
Huang Jun
Phan Duc T.
Song Yanbin
Sniezek Andrew L
Western Digital Technologies Inc.
LandOfFree
Disk drive calibrating VCM notch filter by increasing the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disk drive calibrating VCM notch filter by increasing the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive calibrating VCM notch filter by increasing the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2694353