Invention Grant
US07864482B1 Disk drive calibrating VCM notch filter by increasing the width and/or the depth of the notch
有权
磁盘驱动器通过增加槽口的宽度和/或深度来校准VCM陷波滤波器
- Patent Title: Disk drive calibrating VCM notch filter by increasing the width and/or the depth of the notch
- Patent Title (中): 磁盘驱动器通过增加槽口的宽度和/或深度来校准VCM陷波滤波器
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Application No.: US12394406Application Date: 2009-02-27
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Publication No.: US07864482B1Publication Date: 2011-01-04
- Inventor: Alexander Babinski , Duc T. Phan , Jun Huang , Yanbin Song
- Applicant: Alexander Babinski , Duc T. Phan , Jun Huang , Yanbin Song
- Applicant Address: US CA Lake Forest
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA Lake Forest
- Main IPC: G11B21/02
- IPC: G11B21/02 ; G11B5/596 ; G11B27/36
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.
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