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    • 4. 发明授权
    • Disk drive servo writing from spiral tracks using radial dependent timing feed-forward compensation
    • 使用径向相关定时前馈补偿从螺旋轨道进行磁盘驱动器伺服写入
    • US08929021B1
    • 2015-01-06
    • US13431680
    • 2012-03-27
    • Jiangang LiangWei Guo
    • Jiangang LiangWei Guo
    • G11B5/596G11B27/32
    • G11B20/14G11B20/10222G11B27/32
    • A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of spiral tracks, wherein each spiral track comprising a high frequency signal interrupted at a predetermined interval by a sync mark. An offset r0 representing a difference between an axial rotation of the disk and an axial rotation of the spiral tracks is estimated. Radial dependent timing compensation values are generated in response to the estimated r0. A phase error is generated in response to the sync marks in the spiral track crossings. A control signal is generated in response to the phase error and the radial dependent timing compensation values, and a frequency of an oscillator is adjusted in response to the control signal.
    • 公开了一种磁盘驱动器,包括在包括多个螺旋轨道的盘上致动的磁头,其中每个螺旋轨道包括以预定间隔以同步标记中断的高频信号。 估计表示盘的轴向旋转与螺旋轨迹的轴向旋转之间的差异的偏移r​​0。 响应于估计的r0产生径向相关定时补偿值。 响应于螺旋轨道交叉中的同步标记产生相位误差。 响应于相位误差和与径向相关的定时补偿值产生控制信号,并且响应于控制信号调整振荡器的频率。