发明授权
US5426541A Self-equalization method for partial-response maximum-likelihood disk
drive systems
失效
部分响应最大似然磁盘驱动系统的自均衡方法
- 专利标题： Self-equalization method for partial-response maximum-likelihood disk drive systems
- 专利标题（中）： 部分响应最大似然磁盘驱动系统的自均衡方法
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申请号： US221321申请日： 1994-03-31
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公开(公告)号： US5426541A公开(公告)日： 1995-06-20
- 发明人: Jonathan D. Coker , Richard L. Galbraith , Walter Hirt , David J. Stanek , Mark D. Warne
- 申请人： Jonathan D. Coker , Richard L. Galbraith , Walter Hirt , David J. Stanek , Mark D. Warne
- 申请人地址： NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： NY Armonk
- 主分类号： G11B5/09
- IPC分类号： G11B5/09 ; G11B20/10
摘要：
Apparatus and method for providing equalization adjustment for a filter are provided in a PRML data channel. A first predetermined test pattern is written. Relative error is measured in both magnitude and phase for predetermined frequencies. A relative magnitude ratio for the predetermined frequencies and a phase delay between the predetermined frequencies are identified. A tap set is generated having predefined frequency responses at a plurality of predefined discrete frequencies.
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