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1. 发明授权

US5831786A Disk drive having position sensor for ramp load and unload, and method for its use 失效
标题翻译：具有用于斜坡加载和卸载的位置传感器的磁盘驱动器及其使用方法
公开(公告)号：US5831786A
公开(公告)日：1998-11-03
申请号：US922115
申请日：1997-08-28
申请人： Zine-Eddine Boutaghou , Earl Albert Cunningham , Hal Hjalmar Ottesen
发明人： Zine-Eddine Boutaghou , Earl Albert Cunningham , Hal Hjalmar Ottesen
IPC分类号： G11B21/12 , G11B5/54 , G11B21/02 , G11B21/22
CPC分类号： G11B21/12 , G11B21/02 , G11B21/22 , G11B5/54
摘要： Disclosed is a disk drive having at least one disk for storing data. The disk drive includes at least one transducer for reading or writing data to or from the disk. The transducer is attached to an actuator which positions the transducer with respect to the disk. The actuator includes a controllable motor which is used to move the actuator and the transducer attached thereto. The disk drive also includes a ramp for off loading the transducer or for parking the transducer off of the surface of the disk. Also disclosed is apparatus and methods for measuring and controlling the movement of the actuator and attached transducer while the transducer is coming from a position off of the ramp and onto the surface of the disk.
摘要翻译：公开了一种具有至少一个用于存储数据的盘的磁盘驱动器。磁盘驱动器包括至少一个读取或写入数据到磁盘的传感器。传感器连接到将换能器相对于盘定位的致动器。致动器包括可控马达，其用于移动致动器和连接到其上的换能器。磁盘驱动器还包括用于卸载换能器或将换能器从盘的表面停放的斜坡。还公开了一种装置和方法，用于测量和控制致动器和连接的换能器的运动，同时换能器来自斜坡的位置并且到达盘的表面。

2. 发明授权

US6002540A Method and apparatus for rotary actuator arc compensation correction in a direct access storage device 失效
标题翻译：直接存取存储装置中的旋转执行器电弧补偿校正方法和装置
公开(公告)号：US6002540A
公开(公告)日：1999-12-14
申请号：US87825
申请日：1998-05-29
申请人： Earl Albert Cunningham , Kevin Jack Erickson , Hal Hjalmar Ottesen
发明人： Earl Albert Cunningham , Kevin Jack Erickson , Hal Hjalmar Ottesen
IPC分类号： G11B5/596 , G11B21/10
CPC分类号： G11B5/59644 , G11B21/106 , G11B5/59605 , G11B5/59655 , G11B5/59688
摘要： Rotary actuator arc compensation correction method and apparatus are provided for a direct access storage device (DASD). A reference feedforward correction signal is generated at each of a plurality of sectors around a predetermined track on a disk surface. A specific selected track is identified, and both magnitude and phase of the generated reference feedforward correction signal are modified to correct for the arced trajectory caused by the rotary actuator at the specific selected track. Improved actuator servo control is provided by using pseudo sector compensation to interpolate the feedforward correction signal between servo sectors.
摘要翻译：为直接存取存储设备（DASD）提供旋转执行器电弧补偿校正方法和装置。在盘表面上的预定轨道周围的多个扇区中的每一个处产生参考前馈校正信号。识别特定的所选轨道，并且修改所生成的参考前馈校正信号的幅度和相位，以校正由特定所选轨道处的旋转致动器引起的弧形轨迹。通过使用伪扇区补偿来在伺服扇区之间内插前馈校正信号来提供改进的致动器伺服控制。

3. 发明授权

US5920441A Method and apparatus for controlling a multiple-stage actuator for a disk drive 失效
公开(公告)号：US5920441A
公开(公告)日：1999-07-06
申请号：US532340
申请日：1995-09-22
申请人： Earl Albert Cunningham , Long-Sheng Fan , Hal Hjalmar Ottesen , Timothy Clark Reiley
发明人： Earl Albert Cunningham , Long-Sheng Fan , Hal Hjalmar Ottesen , Timothy Clark Reiley
IPC分类号： G11B5/55 , G11B5/596 , G11B7/085 , G11B7/09 , G11B21/08
CPC分类号： G11B7/0901 , G11B21/085 , G11B5/5552 , G11B5/5556 , G11B5/59605 , G11B5/59627 , G11B7/08505 , G11B7/08576 , G11B7/0937 , G11B7/0945
摘要： A method and apparatus for controlling a multiple-stage actuator for a disk drive which does not require an additional sensor for measuring the relative position between adjacent actuator stages. In a two-stage actuator system, a position-type secondary actuator (SA) rides piggyback on a primary actuator (PA). The repeatable runout is measured and used as a feedforward signal to the PA. If the PA is a rotary actuator, the feedforward signal is preferably arc corrected for the arc that the head transverses from the inner radius to the outer radius of the disk. Added to the feedforward signal is the moving average of the drive signal applied to the SA. Because the SA is of the position-type having a neutral position, this moving average is proportional to the time cumulative drift present in the two-stage actuator system, and forces the PA in a direction that minimizes deviation of the SA from its neutral position. This minimizes the range requirement for the SA, the main purpose of which is to reduce non-repeatable runout.

4. 发明授权

US5783981A Magnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturing 失效
标题翻译：在介质驱动器制造的悬挂级别的薄膜磁阻再现磁头的磁性重新初始化
公开(公告)号：US5783981A
公开(公告)日：1998-07-21
申请号：US462348
申请日：1995-06-05
申请人： Samir Elias Abboud , Nickolas Christopher Apuzzo , Jeffrey Bernard Brown , Earl Albert Cunningham , David Malcolm Hannon , Raymond Patrick Mallette , Paul Sheldon Tyler , Steven Harry Voss , Albert John Wallash
发明人： Samir Elias Abboud , Nickolas Christopher Apuzzo , Jeffrey Bernard Brown , Earl Albert Cunningham , David Malcolm Hannon , Raymond Patrick Mallette , Paul Sheldon Tyler , Steven Harry Voss , Albert John Wallash
IPC分类号： G11B5/00 , G11B5/39 , G11B5/465 , G11B5/48 , H01L43/12 , H01F7/20
CPC分类号： G11B5/3903 , G11B5/465 , G11B5/4886 , G11B2005/0008 , Y10T29/49034
摘要： The magnetic states of MR reproducing heads are reinitialized during media drive manufacturing by applying initializing magnetic fields to the transducers after they have been manufactured and incorporated into media drive assemblies.
摘要翻译：磁记录磁头的磁状态在介质驱动制造过程中被重新初始化，通过在传感器被制造并被并入介质驱动组件之后将其初始化磁场。

5. 发明授权

US5664319A Magnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturing 失效
公开(公告)号：US5664319A
公开(公告)日：1997-09-09
申请号：US471505
申请日：1995-06-06
申请人： Samir Elias Abboud , Nickolas Christopher Apuzzo , Jeffrey Bernard Brown , Earl Albert Cunningham , David Malcolm Hannon , Raymond Patrick Mallette , Paul Sheldon Tyler , Steven Harry Voss , Albert John Wallash
发明人： Samir Elias Abboud , Nickolas Christopher Apuzzo , Jeffrey Bernard Brown , Earl Albert Cunningham , David Malcolm Hannon , Raymond Patrick Mallette , Paul Sheldon Tyler , Steven Harry Voss , Albert John Wallash
IPC分类号： G11B5/00 , G11B5/39 , G11B5/465 , G11B5/48 , H01L43/12 , G11B5/127
CPC分类号： G11B5/3903 , G11B5/465 , G11B5/4886 , G11B2005/0008 , Y10T29/49034
摘要： The magnetic states of MR reproducing heads are reinitialized during media drive manufacturing by applying initializing magnetic fields to the transducers after they have been manufactured and incorporated into media drive assemblies.

6. 发明授权

US06760184B1 Compact servo pattern optimized for M-R heads 失效
标题翻译：针对M-R磁头优化的紧凑型伺服模式
公开(公告)号：US06760184B1
公开(公告)日：2004-07-06
申请号：US09499136
申请日：2000-02-07
申请人： Earl Albert Cunningham
发明人： Earl Albert Cunningham
IPC分类号： G11B5596
CPC分类号： G11B5/59655 , G11B5/59688
摘要： A disk drive system has a servo pattern with bursts that are recorded without multiple passes per burst and without trimming, so that the servo pattern bursts have the same width as the data tracks. The servo write steps occur in partial data track pitch (DTP) increments. A magneto-resistive (M-R) head is used to both record the servo pattern and transduce it. In a two-frequency system, relative gain calibration is performed using AGC circuitry to first calibrate one frequency and then the other. The resulting servo position error sensing (PES) signal has improved linearity and is simpler to write.
摘要翻译：磁盘驱动器系统具有脉冲串的脉冲串，每个脉冲串不进行多次通过而不进行修整，因此伺服模式脉冲串具有与数据磁道相同的宽度。伺服写入步骤发生在部分数据磁道间距（DTP）增量中。磁阻（M-R）头用于记录伺服模式并转换。在双频系统中，使用AGC电路执行相对增益校准，以首先校准一个频率，然后另一个频率。所得到的伺服位置误差感测（PES）信号具有改善的线性，并且写入更简单。

7. 发明授权

US06079044A Method and error correcting code (ECC) apparatus for storing predefined information with ECC in a direct access storage device 失效
标题翻译：用于在直接访问存储设备中用ECC存储预定信息的方法和纠错码（ECC）装置
公开(公告)号：US06079044A
公开(公告)日：2000-06-20
申请号：US892244
申请日：1997-07-14
申请人： Earl Albert Cunningham , Richard Greenberg , Michael J. Shea
发明人： Earl Albert Cunningham , Richard Greenberg , Michael J. Shea
IPC分类号： G11B20/10 , G06F11/10 , G11B20/18 , H03M13/00 , G11C29/00
CPC分类号： G06F11/1008 , H03M13/00
摘要： Apparatus and methods for storing predefined information with error correcting code (ECC) in a direct access storage device are provided. Predetermined information is identified and loaded to an ECC generator for customer data to be read and written. The identified predetermined information includes an address for customer data to be read and written. The customer data is written and loaded in parallel to the ECC generator. Then the generated ECC that reflects the pre-loaded predetermined information is written at the end of the written customer data. The customer data and ECC is read and loaded in parallel to the ECC generator. Errors in the predetermined information that is not written to the disk surface, can be detected from the read ECC.
摘要翻译：提供了用于在直接访问存储设备中存储具有纠错码（ECC）的预定义信息的装置和方法。识别预定信息并将其加载到ECC发生器中，以便客户数据被读取和写入。所识别的预定信息包括要读取和写入的客户数据的地址。客户数据并行编写并加载到ECC发生器。然后，在写入的客户数据的最后写入反映预加载的预定信息的生成的ECC。客户数据和ECC与ECC发生器并行读取和加载。可以从读取的ECC检测到未写入盘表面的预定信息中的错误。

8. 发明授权

US5978163A Circuit and method for optimizing bias supply in a magnetoresistive head based on temperature 失效
标题翻译：基于温度优化磁阻头中的偏置电源的电路和方法
公开(公告)号：US5978163A
公开(公告)日：1999-11-02
申请号：US717918
申请日：1996-09-23
申请人： Earl Albert Cunningham
发明人： Earl Albert Cunningham
IPC分类号： G11B5/00 , G11B5/012 , G11B5/02 , G11B5/40 , G11B19/04 , G11B33/14 , G11B5/03
CPC分类号： G11B5/012 , G11B5/00 , G11B5/02 , G11B5/40 , G11B19/04 , G11B2005/0018 , G11B33/14
摘要： A method and apparatus adaptively controls the bias supply source for magnetoresistive (MR) read heads within a Direct Access Storage Device (DASD) to provide an optimized bias level for the ambient temperature. An optimal bias level for a given ambient temperature is provided in real time by sensing a temperature within a thermal path to the head (e.g., the ambient temperature surrounding the head) and adjusting the bias supply level to the maximum allowable level for that temperature. This adjustable bias level will thereby enhance MR transducer head sensitivity, improve the signal-to-noise ratio, and also reduce errors in reading data from magnetic storage media within the DASD. The maximum allowable bias supply source level is controlled so as to preserve the overall life expectancy of the MR heads.
摘要翻译：一种方法和装置自适应地控制直接存取存储装置（DASD）内的磁阻（MR）读取头的偏置电源，以提供环境温度的优化偏置电平。通过感测到头部的热路径内的温度（例如围绕头部的环境温度）并且将偏置供应水平调整到该温度的最大允许水平，实时地提供给定环境温度的最佳偏置水平。因此，该可调偏置电平将增强MR换能器头灵敏度，提高信噪比，并且还减少从DASD内的磁存储介质读取数据的误差。控制最大允许偏置电源电平以保持MR磁头的总体使用寿命。

9. 发明授权

US5923502A Magneto-resistive head including a selectively placed low-reluctance path between shields 失效
标题翻译：磁阻头包括在屏蔽之间的选择性放置的低磁阻路径
公开(公告)号：US5923502A
公开(公告)日：1999-07-13
申请号：US576496
申请日：1995-12-21
申请人： Thomas Charles Christensen , Jodie Ann Christner , Earl Albert Cunningham , Jay Michael Mosbrucker
发明人： Thomas Charles Christensen , Jodie Ann Christner , Earl Albert Cunningham , Jay Michael Mosbrucker
IPC分类号： G11B5/11 , G11B5/31 , G11B5/39 , G11B5/48 , G11B23/00 , G11B5/008
CPC分类号： G11B5/3903 , G11B5/11 , G11B23/0007 , G11B5/3143 , G11B5/4806
摘要： A magnetic head including a shielded MR element which incorporates a low reluctance path between the shields to reduce interference picked up by inductive reading of the shields. The low reluctance path is provided outside a conductive loop of material which includes the MR element and its associated leads. The low reluctance path may include a magnetic short between the two shields.
摘要翻译：包括屏蔽MR元件的磁头，其在屏蔽之间包含低磁阻路径，以减少通过屏蔽的感应读数拾取的干扰。低磁阻路径设置在包括MR元件及其相关引线的材料的导电回路外部。低磁阻路径可以包括两个屏蔽之间的磁短路。

10. 发明授权

US06307705B1 Method and apparatus for reducing track switch latency in a disk drive 失效
标题翻译：用于减少磁盘驱动器中的轨道交换延迟的方法和装置
公开(公告)号：US06307705B1
公开(公告)日：2001-10-23
申请号：US08084337
申请日：1993-06-28
申请人： Clark Alan Anderson , Todd Barry Anderson , Gerald Lawrence Cadloni , Earl Albert Cunningham , Michael Scott Hicken , Daniel Donald Reno , John Jeffrey Stephenson
发明人： Clark Alan Anderson , Todd Barry Anderson , Gerald Lawrence Cadloni , Earl Albert Cunningham , Michael Scott Hicken , Daniel Donald Reno , John Jeffrey Stephenson
IPC分类号： G11B555
CPC分类号： G11B19/20 , G11B5/5547 , G11B5/59616
摘要： In a ultra high density, multiple-disk drive, track switches within a cylinder of tracks as well as track switches to tracks on other cylinders both require a movement of the head stack actuator. Track switching latency in such a disk drive is reduced by overlapping pre-movement portions of the track switching process with the data transfer operation of the currently active recording head. In addition, post-movement portions of the track switching process are overlapped with the movement of the heads so that the next selected read/write head may begin a data transfer operation immediately upon arrival at the next track. Further, the pre-movement and post-movement portions of the track-switch process may be overlapped with low displacement movement of the read/write heads relative to the currently active track or the next track.
摘要翻译：在超高密度的多磁盘驱动器中，轨道气缸内的轨道开关以及轨道开关到其他气缸上的轨道都需要磁头堆栈致动器的移动。通过与当前活动的记录头的数据传送操作重叠轨道切换过程的预移动部分来减少这种磁盘驱动器中的跟踪切换等待时间。此外，轨道切换处理的后移动部分与磁头的移动重叠，使得下一个所选择的读/写头可以在到达下一个轨道时立即开始数据传送操作。此外，轨道切换过程的预运动和后运动部分可以与读/写头相对于当前活动的轨道或下一个轨道的低位移移动重叠。

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