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    • 4. 发明授权
    • Self-servowriting system with dynamic error propagation reduction
    • 具有动态误差传播减少的自伺服系统
    • US5793554A
    • 1998-08-11
    • US677148
    • 1996-07-09
    • Timothy ChainerMark Delorman SchultzBucknell Chapman WebbEdward John Yarmchuk
    • Timothy ChainerMark Delorman SchultzBucknell Chapman WebbEdward John Yarmchuk
    • G11B5/55G11B5/596G11B21/08
    • G11B21/083G11B5/5534G11B5/59633
    • A self-servowriting system and method for implementation in a storage device such as a disk drive are described. Two problems associated with self-propagation are greater mechanical disturbances and the growth of errors during many thousands of servowriting steps. Error growth is attributable to the special properties of servo loops as applied to a repetitive self-propagation process. Greater resistance to mechanical disturbances and reduction in error growth are achieved, in part, by adjusting a step amplification factor, S, at the initiation of servowriting to within desired parameters. However, S is known to vary with movement of the head in a direction transverse to the direction of the tracks. This problem is addressed by the present invention, wherein S is determined at a plurality of transverse transducer positions. S is dependent upon the closed loop response of the servo system C and upon a set of step-to-step correction factors f. S is therefore determined by monitoring an indicium of S such as C, and is adjusted by adjusting either C or f to provide a value of S which falls within an acceptable range of values. Determination of S is scheduled to occur at predefined intervals. The intervals may be fixed or adjusted adaptively based upon the measured variation of S with transducer position.
    • 描述了用于在诸如磁盘驱动器的存储设备中实现的自伺服驱动系统和方法。 与自传播相关的两个问题是在数千个伺服驱动步骤中更大的机械扰动和误差的增长。 误差增长归因于应用于重复自传播过程的伺服回路的特殊性质。 实现了对机械扰动和误差增长的降低的更大的抵抗力,部分地通过在伺服驱动开始到期望参数期间调整步长放大因子S来实现。 然而,已知S随着头部在与轨道的方向横切的方向上的移动而变化。 本发明解决了这个问题,其中在多个横向换能器位置确定S。 S取决于伺服系统C的闭环响应和一组步进校正因子f。 因此,S通过监视诸如C的S的标记来确定,并且通过调整C或f来调整以提供落在值的可接受范围内的S值。 S的确定计划以预定的间隔发生。 基于测量的S与变换器位置的变化,可以自适应地修改或调整间隔。
    • 6. 发明授权
    • Method, apparatus and computer program product providing energy reduction when storing data in a memory
    • 在将数据存储在存储器中时提供能量减少的方法,装置和计算机程序产品
    • US07783846B2
    • 2010-08-24
    • US11836210
    • 2007-08-09
    • Timothy Chainer
    • Timothy Chainer
    • G06F12/12
    • G11C7/1006G11C7/22
    • A method is disclosed to operate a memory device. The method includes, prior to overwriting a first unit of data at a location in a memory device with a second unit of data, determining if more energy is required to write the second unit of data than to write the second unit of data with at least one sub-unit thereof having bits that are inverted. If it is determined that less energy is required to write the second unit of data with the at least one sub-unit thereof having bits that are inverted, the method further includes overwriting the first unit of data with a modified second unit of data with the at least one sub-unit thereof having bits that are inverted, in conjunction with writing at least one bit memory for indicating a location in the modified unit of data of the sub-unit of data having the inverted bits.
    • 公开了一种操作存储器件的方法。 该方法包括在使用第二数据单元在存储器件中的位置处重写数据的第一单元之前,确定写入第二数据单元是否需要更多的能量而不是至少写入第二数据单元 其一个子单元具有被倒置的位。 如果确定写入第二数据单元的能量少于具有反相位的至少一个子单元,则该方法还包括用经修改的第二数据单元重写第一数据单元, 其至少一个子单元具有被反转的位,结合写入至少一个位存储器,用于指示具有反转位的数据的子单元的修改的数据单元中的位置。
    • 7. 发明申请
    • Method, Apparatus And Computer Program Product Providing Energy Reduction When Storing Data In A Memory
    • 方法,装置和计算机程序产品在存储数据时提供能量减少
    • US20090043944A1
    • 2009-02-12
    • US11836210
    • 2007-08-09
    • Timothy Chainer
    • Timothy Chainer
    • G06F12/00
    • G11C7/1006G11C7/22
    • A method is disclosed to operate a memory device. The method includes, prior to overwriting a first unit of data at a location in a memory device with a second unit of data, determining if more energy is required to write the second unit of data than to write the second unit of data with at least one sub-unit thereof having bits that are inverted. If it is determined that less energy is required to write the second unit of data with the at least one sub-unit thereof having bits that are inverted, the method further includes overwriting the first unit of data with a modified second unit of data with the at least one sub-unit thereof having bits that are inverted, in conjunction with writing at least one bit memory for indicating a location in the modified unit of data of the sub-unit of data having the inverted bits.
    • 公开了一种操作存储器件的方法。 该方法包括在使用第二数据单元在存储器件中的位置处重写数据的第一单元之前,确定写入第二数据单元是否需要更多的能量而不是至少写入第二数据单元 其一个子单元具有被倒置的位。 如果确定写入第二数据单元的能量少于具有反相位的至少一个子单元,则该方法还包括用经修改的第二数据单元重写第一数据单元,其中 其至少一个子单元具有被反转的位,结合写入至少一个位存储器,用于指示具有反转位的数据的子单元的修改的数据单元中的位置。
    • 9. 发明申请
    • Method and apparatus for correcting for systematic errors in timing pattern generation
    • 用于校正定时模式生成中的系统误差的方法和装置
    • US20050105200A1
    • 2005-05-19
    • US11015130
    • 2004-12-17
    • Timothy ChainerAnthony PrainoMark SchultzBucknell WebbEdward Yarmchuk
    • Timothy ChainerAnthony PrainoMark SchultzBucknell WebbEdward Yarmchuk
    • G11B5/55G11B5/596G11B21/10G11B5/09G11B21/02
    • G11B5/59633G11B5/5565G11B21/106
    • Improvements in placement of timing patterns in self-servowriting include correcting for systematic errors due to geometric effects. A correction is made for varying systematic errors, such as when the recording head has spatially separate read and write elements. Further, servopattern rotation due to residual or unmeasured systematic errors is reduced by using a once per revolution clock index derived from the motor drive current waveform or any other sensor. In one aspect of correcting for systematic errors in the writing of timing patterns on a storage medium of a storage device, a time interval between a trigger pattern written at a first radial position of the storage medium and a rotational index is measured. The rotational index is related to the rotational orientation of the storage medium with respect to a fixed frame of the storage device. The location of another trigger pattern to be written is shifted, using the measured time interval to determine the shift in location for the another trigger pattern.
    • 自我维护中定时模式布局的改进包括纠正由于几何效应引起的系统误差。 对变化的系统误差进行校正,例如当记录头具有空间上分离的读和写元件时。 此外,通过使用从电动机驱动电流波形或任何其他传感器导出的每转一次的时钟指数来减少由于残余或未测量的系统误差引起的伺服模式旋转。 在对存储装置的存储介质上的定时模式的写入进行校正系统错误的一个方面,测量在存储介质的第一径向位置上写入的触发模式与旋转指标之间的时间间隔。 旋转指数与存储介质相对于存储装置的固定框架的旋转取向有关。 使用测量的时间间隔来移动要写入的另一个触发模式的位置,以确定另一个触发模式的位置偏移。
    • 10. 发明申请
    • Self-servo -writing multi-slot timing pattern
    • 自动伺服写入多时隙定时模式
    • US20050002120A1
    • 2005-01-06
    • US10903153
    • 2004-07-30
    • Timothy ChainerMark SchultzBucknell Webb
    • Timothy ChainerMark SchultzBucknell Webb
    • G11B21/10G11B5/596G11B5/09G11B21/02
    • G11B5/59633G11B5/59605
    • A system and method for improved self-servo-writing of multi-slot timing patterns is described. Individual timing marks are replaced with groups of timing mark slots. At each timing mark location, a time measurement is made by detecting a timing mark in one of the slots. Also, extensions to the existing timing marks are written in other slots. The combination of timing measurements at every timing mark and extensions to those timing marks written at every opportunity improves the overall precision of the timing propagation. The improved accuracy of timing mark placement produces a commensurate improvement in the placement of the concomitantly written servo-data. In addition, the alignment accuracy of the written pattern is less sensitive to variations in rotation speed and variations in the shape of written transitions. Moreover, only a single disk revolution is required at each servo radius to write servo data and propagate the timing marks to maintain timing alignment.
    • 描述了用于改进多时隙定时模式的自伺服写入的系统和方法。 单个定时标记被定时标记位置组替换。 在每个定时标记位置,通过检测其中一个时隙中的定时标记来进行时间测量。 此外,现有时序标记的扩展也写在其他插槽中。 每个定时标记的定时测量和在每个机会上写入的定时标记的扩展的组合可以提高定时传播的总体精度。 定时标记放置的改进精度在同时写入的伺服数据的位置上产生相应的改进。 此外,写入的图案的对准精度对旋转速度的变化和写入的转变的形状的变化较不敏感。 此外,在每个伺服半径处仅需要一次盘旋转以写入伺服数据并传播定时标记以保持定时对准。