发明名称 |
Apparatus and method of forming evaluation signal used in adjusting focus bias and adjusting skew of disk drive |
摘要 |
An apparatus of forming an evaluation signal used in adjusting focus bias and adjusting skew of a disk drive in which phase error information between a phase of a read data signal and a phase of a clock signal formed in synchronism with the read data signal, is detected, the phase error signal is converted into an analog signal and is outputted as an evaluation signal having a signal level in accordance with the phase error amount and the evaluation signal is inputted after A/D conversion to a portion for carrying out signal quality evaluation by using the evaluation signal whereby pertinent signal evaluation can be carried out by a simple constitution.
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申请公布号 |
US6353585(B1) |
申请公布日期 |
2002.03.05 |
申请号 |
US19970914934 |
申请日期 |
1997.08.20 |
申请人 |
SONY CORPORATION |
发明人 |
KAWASHIMA TETSUJI;AKITA MAMORU;YOSHIMURA SHUNJI |
分类号 |
G11B7/00;G11B7/005;G11B7/09;G11B7/095;G11B20/10;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/00 |
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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