发明名称 |
Disk drive apparatus |
摘要 |
A disk drive apparatus for a disk having helically-formed or concentric circle-like formed tracks includes a spindle motor for controlling a rotation of the disk; a pick-up device for recording or reproducing information on or from the disk; a stepping motor for moving the pick-up device in a radial direction of the disk in accordance with a drive current; a system controller for tracking a rotation speed of the spindle motor and for outputting command signals according to the rotation speed of the spindle motor; and a stepping motor controller for controlling the stepping motor by changing a slope of a rising part and a falling part of a waveform of the drive current of the stepping motor according to the command signals.
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申请公布号 |
US2005083800(A1) |
申请公布日期 |
2005.04.21 |
申请号 |
US20040963243 |
申请日期 |
2004.10.12 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
OKADA TAKANORI;YOSHIDA SHUICHI;IMURA MASAHARU;MASAKI KIYOSHI;MIHARA KAZUHIRO;KAI TSUTOMU;AKAGI NORITAKA;HARUI MASANORI;KOUNO KAZUHIKO |
分类号 |
G11B7/085;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/085 |
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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