公开(公告)号：US06538835B1

公开(公告)日：2003-03-25

申请号：US09435319

申请日：1999-11-04

申请人： Matthew C. Burton

发明人： Matthew C. Burton

IPC分类号： G11B1512

CPC分类号： G11B5/5547

摘要： Apparatus and method for compensating for position signal distortion during a disc drive seek. A disc drive has first and second data recording surfaces on which tracks are defined, a moveable actuator which supports first and second magneto-resistive heads, and a servo circuit which applies current to an actuator motor to position the heads. During a seek in which the first head is moved from an initial track to a first destination track, upon loss of transduced servo data from the first data recording surface indicative of radial position of the head, the servo circuit switches from the first head to the second head and applies current to the actuator motor to move the second head to a known radial position with respect to the first destination track while transducing servo data from the second data recording surface. The servo circuit subsequently switches back to the first head to position the first head over the first destination track.

摘要翻译： 用于在盘驱动器寻找期间补偿位置信号失真的装置和方法。 磁盘驱动器具有第一和第二数据记录表面，轨道被定义在其上，支撑第一和第二磁阻头的可移动致动器以及向致动器马达施加电流以定位磁头的伺服电路。 在第一头从初始轨迹移动到第一目的地轨道的寻道期间，当从表示头部的径向位置的第一数据记录表面丢失转换的伺服数据时，伺服电路从第一头切换到 第二头，并且将电流施加到致动器电动机，以将第二头相对于第一目的地轨道移动到已知的径向位置，同时从第二数据记录表面传送伺服数据。 伺服电路随后切换回第一磁头，将第一磁头定位在第一目的磁道上。

公开(公告)号：US06373649B1

公开(公告)日：2002-04-16

申请号：US09271541

申请日：1999-03-18

申请人： Timothy T. Walker ,  Robert Matousek ,  Matthew C. Burton

发明人： Timothy T. Walker ,  Robert Matousek ,  Matthew C. Burton

IPC分类号： G11B502

CPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/455 ,  G11B5/4886 ,  G11B19/02 ,  G11B21/00

摘要： An apparatus and method for determining the configuration of a disc drive head-disc assembly (HDA). The HDA includes an array of rotatable discs and an actuator adjacent the discs, with the actuator supporting a maximum number of heads in a fully populated configuration and a reduced number of heads in a depopulated configuration. Each head is disposed at a unique head position. During each spin-up of the disc drive, a servo circuit determines an impedance of a selected head position having a head when the disc drive is fully populated, but not when the disc drive is depopulated. The servo circuit identifies this configuration of the HDA in relation to the determined impedance, and initializes the drive accordingly. The drive then identifies the configuration of the HDA based on the value of the impedance, initializing the drive accordingly.

摘要翻译： 一种用于确定盘驱动头盘组件（HDA）的配置的装置和方法。 HDA包括可旋转圆盘阵列和邻近圆盘的致动器，致动器以完全填充的构型支撑最大数量的头部，并且减少了数量不足的头部。 每个头部处于独特的头部位置。 在磁盘驱动器的每次旋转期间，当盘驱动器完全填充时，伺服电路确定具有磁头的所选磁头位置的阻抗，而不是当磁盘驱动器被人口占用时。 伺服电路相对于确定的阻抗识别HDA的这种配置，并相应地初始化驱动器。 然后，驱动器根据阻抗的值识别HDA的配置，相应地初始化驱动器。

公开(公告)号：US06545838B1

公开(公告)日：2003-04-08

申请号：US09552604

申请日：2000-04-19

申请人： Matthew C. Burton

发明人： Matthew C. Burton

IPC分类号： G11B5596

CPC分类号： G11B21/083 ,  G11B5/5547

摘要： Method and apparatus for moving a head of a disc drive from an initial position to a destination position on a recording surface of a rotatable disc by generating and applying a model reference current to an actuator motor. A servo circuit includes a current profile generator which generates a baseline reference current profile. A gain calculator calculates first and second gain factors in relation to an initial velocity of the head. A gain block generates the model reference current by applying the first gain factor to a first portion of the baseline reference current profile used to accelerate the head and subsequently applying the second gain factor to a second portion of the baseline reference current profile used to decelerate the head, wherein the first and second gain factors have different respective magnitudes to compensate for a nonzero initial velocity of the head.

摘要翻译： 一种用于通过产生模型参考电流并将其施加到致动器马达来将盘驱动器的头从初始位置移动到可旋转盘的记录表面上的目的位置的方法和装置。 伺服电路包括产生基准参考电流分布的电流分布生成器。 增益计算器计算关于头部的初始速度的第一和第二增益因子。 增益块通过将第一增益因子应用于用于加速头的基线参考电流分布的第一部分并随后将第二增益因子应用于用于减速的基准参考电流分布的第二部分来生成模型参考电流 头，其中第一和第二增益因子具有不同的相应幅度以补偿头的非零初始速度。

公开(公告)号：US06490120B1

公开(公告)日：2002-12-03

申请号：US09352461

申请日：1999-07-13

申请人： Matthew C. Burton ,  Jason D. Gregg

发明人： Matthew C. Burton ,  Jason D. Gregg

IPC分类号： G11B5596

CPC分类号： G11B5/5547 ,  G11B5/5565 ,  G11B5/59622 ,  G11B5/59627 ,  G11B21/083 ,  G11B21/106

摘要： Apparatus and method for optimizing a gain of a disc drive servo circuit, the gain used to control the magnitude of current applied by the servo circuit to a voice coil motor to position a head adjacent tracks of a disc. The servo circuit includes a servo processor which selects an initial value of the gain, and then proceeds to perform a gain convergence operation wherein the head is repeatedly moved across the disc over a number of passes and position error is accumulated during each pass. The accumulated position error is used along with a scale factor to converge the gain from an initial gain value to a final, optimal gain value. The scale factor is variable and is also converged over the successive number of passes from an initial value to a final, nominal value, in order to decrease the time required to obtain the final, optimal gain value.

摘要翻译： 用于优化盘驱动器伺服电路的增益的装置和方法，所述增益用于控制由伺服电路施加到音圈电机的电流的大小，以将磁头定位在与磁道相邻的轨道上。 伺服电路包括选择增益的初始值的伺服处理器，然后进行增益收敛操作，其中头部在多次通过中被重复移动穿过该盘，并且在每次通过期间累积位置误差。 累积位置误差与缩放因子一起使用，以将增益从初始增益值收敛到最终的最佳增益值。 比例因子是可变的，并且也在从初始值到最终的标称值的连续数量的传递中收敛，以便减少获得最终的最佳增益值所需的时间。

公开(公告)号：US6055121A

公开(公告)日：2000-04-25

申请号：US920592

申请日：1997-08-29

申请人： Ke Du ,  William C. Little ,  Matthew C. Burton

发明人： Ke Du ,  William C. Little ,  Matthew C. Burton

IPC分类号： G11B5/596

CPC分类号： G11B5/59644

摘要： An apparatus and method for optimizing detection thresholds used to identify addresses of tracks in a disc drive having a head and a disc upon which a plurality of tracks are defined, the tracks including track address fields in which track address information is stored. A comparator is provided which generates track address sequence signals in response to a corresponding plurality of readback signals obtained as the head is maintained in a fixed relationship to a selected track. A demodulator identifies erroneous track address sequence signals therefrom and increments a count in an accumulator for each detected, erroneous signal. A detection threshold circuit sequentially provides the comparator with a set of detection thresholds from a population of detection thresholds, each of which are used in turn by the comparator. An optimal set of thresholds is thereby selected for use by the disc drive in accordance with the relative number of erroneous track address sequence signals accumulated for each of the detection thresholds from the population.

摘要翻译： 一种用于优化检测阈值的装置和方法，用于识别具有头和盘的盘驱动器中的轨道的地址，轨道地址信息被存储在轨道地址字段中。 提供比较器，其响应于当头被保持与所选轨道的固定关系时获得的对应的多个回读信号而产生轨道地址序列信号。 解调器从其识别错误的轨道地址序列信号，并为每个检测到的错误信号增加累加器中的计数。 检测阈值电路依次向比较器提供一组检测阈值，每个检测阈值由比较器依次使用。 因此，根据从群体中的每个检测阈值积累的错误轨道地址序列信号的相对数目，选择最佳阈值集合供磁盘驱动器使用。