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1. 发明授权

US06219192B1 Method and apparatus for the compensation of an additive signal in a data signal 失效
标题翻译：用于补偿数据信号中的附加信号的方法和装置
公开(公告)号：US06219192B1
公开(公告)日：2001-04-17
申请号：US09179148
申请日：1998-10-26
申请人： Srinivasan Gopalaswamy , Bin Liu , Yuan Xing Lee
发明人： Srinivasan Gopalaswamy , Bin Liu , Yuan Xing Lee
IPC分类号： G11B502
CPC分类号： G11B20/10055 , G11B5/012 , G11B5/09 , G11B20/10009 , G11B20/10037 , G11B2005/0016
摘要： The method and apparatus have application to the compensation of transient signals produced on reading a data storage device with a magneto-resistive head due to thermal contact with asperities on the data storage medium. Preferably, the data channel employs partial-response maximum-likelihood detection. The method compensates for an additive signal in a data signal and comprises the steps of: detecting the contribution to said data signal by said additive signal; initially compensating the data signal by maintaining a DC offset in said data signal, the initial level of said DC offset being set in dependence on the detected contribution; and while compensating the data signal, detecting when the compensated data signal exceeds a predetermined threshold and varying the set level of said DC offset in dependence upon said detection.
摘要翻译：该方法和装置可应用于由于与数据存储介质上的粗糙度的热接触而使用磁阻头读取数据存储装置时产生的瞬态信号的补偿。优选地，数据信道采用部分响应最大似然检测。该方法补偿数据信号中的加法信号，并且包括以下步骤：通过所述加法信号检测对所述数据信号的贡献; 通过维持所述数据信号中的DC偏移来初始地补偿数据信号，根据检测到的贡献来设置所述DC偏移的初始电平; 并且在补偿数据信号的同时，检测补偿数据信号何时超过预定阈值，并根据所述检测改变所述DC偏移的设定电平。

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