发明名称 |
Method and apparatus for generating servo information |
摘要 |
A method and apparatus for generating servo information used in positioning the read head of a hard disk drive. The apparatus comprises a disk having a plurality of tracks, at least one of which has a servo field which includes four servo bits: an A bit, a B bit, a C bit and a D bit, where the A bit and the B bit have a common boundary located at the track centerline and where the C bit and the D bit have a common boundary. A servo signal based on the four servo bits is generated and used to position the head relative to a track of the disk. A servo signal may be generated from the sum of the difference between the A and B bits, and the difference between the C and D bits. An offset may be used to eliminate phase errors introduced into the servo signal. The offset may be representative of the magnitude of the difference between the C and D bits. The servo signal may also be generated from the difference of the difference between the A and B bits, and the difference between the C and D bits.
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申请公布号 |
US5781361(A) |
申请公布日期 |
1998.07.14 |
申请号 |
US19960641686 |
申请日期 |
1996.05.01 |
申请人 |
SAMSUNG ELECTRONICS, LTD. |
发明人 |
LE, ME VAN;LIN, JONG-MING |
分类号 |
G11B7/007;G11B5/596;(IPC1-7):G11B5/596 |
主分类号 |
G11B7/007 |
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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