公开(公告)号：US06310739B1

公开(公告)日：2001-10-30

申请号：US09283351

申请日：1999-03-31

申请人： Peter A. McEwen ,  Bahjat Zafer ,  Kelly K. Fitzpatrick ,  Ke Han ,  Steve Aronson ,  Kevin Fisher

发明人： Peter A. McEwen ,  Bahjat Zafer ,  Kelly K. Fitzpatrick ,  Ke Han ,  Steve Aronson ,  Kevin Fisher

IPC分类号： G11B502

CPC分类号： G11B27/36 ,  G01R33/1207 ,  G11B5/00 ,  G11B5/012 ,  G11B33/10 ,  G11B2220/20

摘要： A discrete-time filtering method for identifying defects in a magnetic medium, comprising the steps of: reading data signals from at least a portion of the medium; sampling the data signals to generate discrete time sample data; processing the sample data in a discrete time filter to detect deviation of the signal corresponding to media defects; and comparing the deviation of the signal to one or more threshold values to identify corresponding defect types on the recording medium. The filter can be configured to have an impulse response substantially matched to deviation of the signal corresponding to media defects.

摘要翻译： 一种用于识别磁介质中的缺陷的离散时间滤波方法，包括以下步骤：从介质的至少一部分读取数据信号; 对数据信号进行采样以产生离散时间采样数据; 在离散时间滤波器中处理样本数据以检测对应于介质缺陷的信号的偏差; 以及将信号的偏差与一个或多个阈值进行比较，以识别记录介质上的相应缺陷类型。 滤波器可以被配置为具有与对应于介质缺陷的信号的偏差基本匹配的脉冲响应。

公开(公告)号：US07362536B1

公开(公告)日：2008-04-22

申请号：US11440623

申请日：2006-05-25

申请人： Jingfeng Liu ,  Jinghuan Chen ,  Steve Aronson

发明人： Jingfeng Liu ,  Jinghuan Chen ,  Steve Aronson

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/5556 ,  G11B5/59616

摘要： Methods of compensating for radial incoherence in servo information that is read from adjacent servo tracks that have a phase offset relative to one another on a data storage disk of a disk drive are provided. While a transducer is seeking to a target track, the transducer generate a servo information signal that has a first component from servo information read from a first servo track on the disk and a second component from servo information read from a second servo track that is radially adjacent to the first servo track. The servo information in the first and second servo tracks are offset by a non-zero phase error relative to one another and are in a same servo sector on the disk. The servo information signal is sampled to generate a series of sampled servo values. A phase error of a group of the sampled servo values is determined. The sampled servo values are compensated in response to the determined phase error to generate compensated servo values with at least reduced phase error.

摘要翻译： 提供了补偿在磁盘驱动器的数据存储盘上相对于彼此相位偏移的相邻伺服磁道读取的伺服信息中的径向相干性的方法。 当换能器正在寻找目标轨道时，换能器产生伺服信息信号，该伺服信息信号具有从盘上的第一伺服轨迹读取的伺服信息的第一分量，以及从径向地从第二伺服轨道读取的伺服信息的第二分量 邻近第一伺服轨道。 第一和第二伺服磁道中的伺服信息相对于彼此偏移非零相位误差，并且在磁盘上处于相同的伺服扇区中。 伺服信息信号被采样以产生一系列采样的伺服值。 确定一组采样伺服值的相位误差。 响应于所确定的相位误差来补偿采样的伺服值，以产生至少具有减小的相位误差的补偿的伺服值。