Disk drive selecting a global digital-to-analog setting for a plurality of heads
    1.
    发明授权
    Disk drive selecting a global digital-to-analog setting for a plurality of heads 有权
    磁盘驱动器为多个磁头选择全局数模转换设置

    公开(公告)号:US08780473B1

    公开(公告)日:2014-07-15

    申请号:US12608871

    申请日:2009-10-29

    IPC分类号: G11B5/09

    摘要: A method is disclosed for selecting a global digital-to-analog setting for a plurality of heads in a disk drive, the disk drive comprising a plurality of disk surfaces and a plurality of respective heads. The method comprises: adjusting a first digital-to-analog setting for a first head to generate a first signal, adjusting a second digital-to-analog setting for a second head to generate a second signal, selecting a first scalar setting for scaling the first signal, selecting a second scalar setting for scaling the second signal, and selecting the global digital-to-analog setting in response to the adjusted first digital-to-analog setting, the adjusted second digital-to-analog setting, the first scalar setting, and the second scalar setting.

    摘要翻译: 公开了一种用于为盘驱动器中的多个头选择全局数模转换设置的方法,该盘驱动器包括多个盘表面和多个相应的头。 该方法包括:调整用于第一头的第一数字 - 模拟设置以产生第一信号,调整用于第二头的第二数字 - 模拟设置以产生第二信号,选择第一标量设置以缩放 第一信号,选择用于缩放第二信号的第二标量设置,以及响应于调整的第一数模转换设置,调整的第二数模转换设置,第一标量选择全局数模转换设置 设置和第二个标量设置。

    Disk drive detecting touchdown event by evaluating frequency response of a touchdown metric
    2.
    发明授权
    Disk drive detecting touchdown event by evaluating frequency response of a touchdown metric 有权
    磁盘驱动器通过评估接地度量的频率响应来检测触地事件

    公开(公告)号:US08699173B1

    公开(公告)日:2014-04-15

    申请号:US13224118

    申请日:2011-09-01

    IPC分类号: G11B21/02

    CPC分类号: G11B5/6076

    摘要: A disk drive is disclosed comprising a head actuated over a disk, and a fly height actuator operable to control a fly height of the head over the disk. A periodic control signal is applied to the fly height actuator, a frequency response of a touchdown metric at a frequency of the periodic control signal is measured, and a touchdown event is detected in response to the frequency response of the touchdown metric.

    摘要翻译: 公开了一种盘驱动器,其包括在盘上致动的头部,以及可操作以控制头部在盘上的飞行高度的飞行高度致动器。 周期控制信号被施加到飞行高度致动器,测量在周期性控制信号的频率处的触地度量的频率响应,并且响应于触地度量的频率响应来检测触地事件。