发明名称 |
Disk storage device |
摘要 |
A disk drive comprises a controller (70) that calculates a drive signal for positioning a head at a desired track on the basis of a desired track-position signal and a measured head-position signal, and a drive circuit for driving a voice-coil motor. The drive circuit includes a current feedback amplifier (21) and a voltage feedback amplifier (50), which can be selectively used. The controller (70) is provided with a speed limiter for determining a maximum speed limiting the speed of a head. The voltage feedback amplifier of the drive circuit is used when the head-position signal is unstable or otherwise malfunctioning, and the current feedback amplifier of the drive circuit is used when the head-position signal is normal.
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申请公布号 |
US2004125492(A1) |
申请公布日期 |
2004.07.01 |
申请号 |
US20030676570 |
申请日期 |
2003.09.30 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. |
发明人 |
HAMADA YOSUKE;DATE KAZUYUKI |
分类号 |
G11B5/55;G11B7/085;G11B21/08;G11B21/10;(IPC1-7):G11B21/02 |
主分类号 |
G11B5/55 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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