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1. 发明授权

US07095201B1 Method and apparatus for providing a user selectable start-up current in a disk drive 有权
标题翻译：用于在盘驱动器中提供用户可选择的启动电流的方法和装置
公开(公告)号：US07095201B1
公开(公告)日：2006-08-22
申请号：US09973791
申请日：2001-10-09
申请人： Erhard Schreck , Mark Heimbaugh
发明人： Erhard Schreck , Mark Heimbaugh
IPC分类号： G05B11/01
CPC分类号： G11B5/5521 , G11B19/02
摘要： A method and apparatus for providing a user selectable start-up current in a disk drive are provided. A user may select a relatively high start-up current to provide a relatively fast start-up time in a disk drive. Alternatively, the user may select a relatively low maximum current draw by the hard drive to enable a relatively low power, low cost power supply to be used in connection with the hard drive, for use with applications in which a relatively long start-up time is acceptable. In connection with applications in which a low cost power supply is to be used, the maximum current drawn by the disk drive may be limited to the amount of current required by the disk drive during seek operations.
摘要翻译：提供了一种用于在盘驱动器中提供用户可选择的启动电流的方法和装置。用户可以选择相对较高的启动电流以在磁盘驱动器中提供相对快速的启动时间。或者，用户可以通过硬盘驱动器选择相对较低的最大电流消耗，以使得能够与硬盘驱动器结合使用相对低功率，低成本的电源，以便与其中相对长的启动时间是可以接受的关于要使用低成本电源的应用，磁盘驱动器吸取的最大电流可能被限制在磁盘驱动器在寻找操作期间所需的电流量。

2. 发明授权

US07203019B1 Latch apparatus for latching an actuator arm assembly in a disk drive 失效
标题翻译：用于将致动器臂组件锁定在盘驱动器中的闩锁装置
公开(公告)号：US07203019B1
公开(公告)日：2007-04-10
申请号：US11243815
申请日：2005-10-05
申请人： Yanning Liu , Yanchu Xu , Michael McGrath , David Tung , Mark Heimbaugh
发明人： Yanning Liu , Yanchu Xu , Michael McGrath , David Tung , Mark Heimbaugh
IPC分类号： G11B21/02 , G11B21/22 , G11B5/54 , G11B5/596
CPC分类号： G11B21/22 , G11B5/54
摘要： A latch apparatus is configured to latch an actuator arm assembly that can position a read/write head relative to a data storage disk in a disk drive. The latch apparatus includes a latch arm, a coil, a permanent magnet, and a latch control circuit. The latch arm is configured to be moved between a closed position that inhibits movement of the actuator arm assembly in a landing zone and an open position that does not inhibit movement of the actuator arm assembly in the landing zone. The coil is configured to generate an electromagnetic force on the latch arm responsive to a coil current. The permanent magnet is configured to generate a magnetic force on the latch arm that is substantially opposed to the electromagnetic force from the coil. The latch control circuit is configured to increase according to defined open current profiles over a defined opening time period the coil current to at least an upper defined level to cause the coil to move the latch arm from the closed position to the open position. The latch control circuit is further configured to decrease according to defined close current profiles over a defined closing time period the coil current to no more than a lower defined level to cause the permanent magnet to move the latch arm from the open position to the closed position.
摘要翻译：闩锁装置被配置为闩锁致动器臂组件，该致动臂组件可相对于盘驱动器中的数据存储盘定位读/写头。闩锁装置包括闩锁臂，线圈，永磁体和闩锁控制电路。闩锁臂构造成在关闭位置之间移动，该关闭位置阻止致动器臂组件在着陆区域中的运动和不阻止致动器臂组件在着陆区域中的运动的打开位置。线圈构造成响应于线圈电流而在闩锁臂上产生电磁力。永磁体构造成在闩锁臂上产生与来自线圈的电磁力基本相反的磁力。闩锁控制电路被配置为根据限定的开启时间周期将线圈电流增加到至少上限确定的电平，以使线圈将闩锁臂从关闭位置移动到打开位置。闩锁控制电路还被配置为根据限定的闭合时间周期将线圈电流减小到不大于较低限定水平以使永磁体将闩锁臂从打开位置移动到闭合位置。

3. 发明授权

US06980383B2 Monitoring of phenomena indicative of PTP in a magnetic disk drive 失效
标题翻译：监视磁盘驱动器中指示PTP的现象
公开(公告)号：US06980383B2
公开(公告)日：2005-12-27
申请号：US10369179
申请日：2003-02-19
申请人： Don Brunnett , Duc Banh , Jingbo Yu , Mark Heimbaugh , Suet Teo , Erhard Schreck
发明人： Don Brunnett , Duc Banh , Jingbo Yu , Mark Heimbaugh , Suet Teo , Erhard Schreck
IPC分类号： G11B5/00 , G11B5/012 , G11B5/02 , G11B5/40 , G11B5/455 , G11B27/36
CPC分类号： G11B5/3136 , G11B5/012 , G11B5/02 , G11B5/40 , G11B5/455 , G11B27/36 , G11B2005/001 , G11B2220/20
摘要： A PTP test subsystem of a magnetic disk drive identifies an undesired pole tip protrusion (PTP) condition, and takes steps to prevent problems associated with PTP. A PTP stressing mechanism stresses the disk drive during a PTP test mode to induce a PTP condition. A disk contact detection circuit detects when a head of the disk drive contacts the disk. A PTP write current determining circuit is also provided which comprises a write current level detector to ascertain a write current level at which the disk contact detection circuit detects when the head of the disk drive contacts the disk while the disk drive is stressed during the PTP test mode.
摘要翻译：磁盘驱动器的PTP测试子系统识别不期望的极尖突起（PTP）条件，并采取措施来防止与PTP相关的问题。 PTP应激机制在PTP测试模式下强制磁盘驱动器以诱导PTP状态。磁盘接触检测电路检测磁盘驱动器的磁头何时接触磁盘。还提供了一种PTP写入电流确定电路，其包括一个写入电平电平检测器，用于确定当PTP测试期间磁盘驱动器受到应力时磁盘驱动器的磁头接触磁盘时磁盘接触检测电路检测到的写入电平水平模式。

4. 发明授权

US07369345B1 Mobile hard disk drive free fall detection and protection 有权
标题翻译：移动硬盘驱动器自由落体检测和保护
公开(公告)号：US07369345B1
公开(公告)日：2008-05-06
申请号：US11292831
申请日：2005-12-02
申请人： Yunfeng Li , Erhard Schreck , Wei Guo , Tim Glassburn , Mark Heimbaugh , William Flynn , Oliver Northrup , John E. Scura , Lin Guo , Xiaokun Chew
发明人： Yunfeng Li , Erhard Schreck , Wei Guo , Tim Glassburn , Mark Heimbaugh , William Flynn , Oliver Northrup , John E. Scura , Lin Guo , Xiaokun Chew
IPC分类号： G11B5/54 , G11B21/12
CPC分类号： G11B5/5582
摘要： A system provided for protecting a disk drive from impact damages. More specifically, a disk drive is provided that includes an accelerometer interconnected to a printed circuit board that detects free fall of the disk drive. In addition, the velocity of spinning disks of the disk drive is also monitored to assess changes in velocity thereof that may indicate the presence of a tumbling condition. Furthermore, the change in acceleration measured by the accelerometer is monitored to prevent false indications of free fall due to common vibrations. Thus an enhanced system is provided that protects disk drives from the effect of free falls under a wide variety of conditions and allowing for drops from shorter distances to be identified.
摘要翻译：一种用于保护磁盘驱动器免受冲击损坏的系统。更具体地，提供了一种盘驱动器，其包括与检测盘驱动器的自由落下的印刷电路板互连的加速度计。此外，还监视磁盘驱动器的旋转磁盘的速度以评估其速度的变化，其可以指示存在翻滚状况。此外，监测由加速度计测量的加速度变化，以防止由于共同振动引起的自由落体的错误指示。因此，提供了一种增强的系统，其保护磁盘驱动器免受各种条件下的自由落体的影响，并允许识别较短距离的液滴。

5. 发明授权

US07362534B1 System for detecting a change in head-to-disk contact status in a disk drive 有权
标题翻译：用于检测磁盘驱动器中磁盘到磁盘接触状态变化的系统
公开(公告)号：US07362534B1
公开(公告)日：2008-04-22
申请号：US11101112
申请日：2005-04-07
申请人： Erhard Schreck , Francis P. Crimi , Jingbo Yu , Michael Mallary , Scott Hughes , Duc Bahn , Mark Heimbaugh , Kazuhiro Saito , Andrew LeFebvre , Joerg Ferber , Xiaoping Hu , Douglas J. Krajnovich , Chris Hawks , Donald J Brunnett , Bruce C Schardt
发明人： Erhard Schreck , Francis P. Crimi , Jingbo Yu , Michael Mallary , Scott Hughes , Duc Bahn , Mark Heimbaugh , Kazuhiro Saito , Andrew LeFebvre , Joerg Ferber , Xiaoping Hu , Douglas J. Krajnovich , Chris Hawks , Donald J Brunnett , Bruce C Schardt
IPC分类号： G11B21/02 , G11B5/596 , G11B5/58
CPC分类号： G11B5/5526 , G11B5/3136 , G11B5/54
摘要： A disk drive includes a rotatable storage disk, an actuator motor, a slider that magnetically interacts with the storage disk, and a drive circuitry. A portion of the slider moves between a first position wherein the slider does not contact the storage disk and a second position wherein the slider contacts the storage disk. The drive circuitry can detect when the position of the slider changes between these positions. In one embodiment, the drive circuitry monitors off-track movement of the slider to detect when the slider has moved between these positions. The drive circuitry can also current that is directed to the actuator motor that is used to compensate for off-track movement to detect when the slider moves between these positions. In yet another embodiment, the drive circuitry monitors a rotational velocity of the storage disk to detect approximately when the slider moves between these positions.
摘要翻译：磁盘驱动器包括可旋转存储盘，致动器马达，与存储盘磁性相互作用的滑块和驱动电路。滑块的一部分在滑块不接触存储盘的第一位置和滑块接触存储盘的第二位置之间移动。驱动电路可以检测滑块的位置何时在这些位置之间变化。在一个实施例中，驱动电路监视滑块的偏离轨迹运动，以检测滑块何时在这些位置之间移动。驱动电路还可以引导到致动器马达的电流，该电流用于补偿离轨运动以检测滑块何时在这些位置之间移动。在另一个实施例中，驱动电路监视存储盘的旋转速度，以便在滑块在这些位置之间移动时大致检测。

6. 发明授权

US07633702B1 Method and apparatus for powering voice coil motor retract circuit while braking spindle 有权
标题翻译：在制动主轴时为音圈电机回缩电路供电的方法和装置
公开(公告)号：US07633702B1
公开(公告)日：2009-12-15
申请号：US09820415
申请日：2001-03-29
申请人： Mark Heimbaugh
发明人： Mark Heimbaugh
IPC分类号： G11B21/02
CPC分类号： G11B21/12 , G11B5/54 , G11B19/2063 , G11B19/22
摘要： An apparatus for powering a voice coil motor retract circuit in a disk drive is disclosed. The apparatus allows a disk drive to power the voice coil motor retract circuit while also slowing the spinning disk. A DC-to-DC converter converts the back electromotive force from the spinning disk into voltage which drives the retract circuit. A feedback circuit controls the switching of the DC-to-DC converter based on the available voltage for performing the retract function. Importantly, the DC-to-DC converter allows the disk to be slowed while simultaneously providing power to the retract circuit. In one embodiment, the windings of the spindle motor are used as the inductor element in the DC-to-DC converter. The power MOSFETs associated with the spindle motor are used as the diode unit and the switch unit of the DC-to-DC converter. The power supply capacitor is used as the output capacitor of the DC-to-DC converter. The feedback circuit provides a fixed off time in which energy is transferred from the spindle motor windings into the DC-to-DC converter output capacitor, and a minimum on time in which energy is allowed to build in the spindle motor windings. A method for powering the voice coil motor retract circuit while braking the disk is also disclosed.
摘要翻译：公开了一种用于为盘驱动器中的音圈电动机缩回电路供电的装置。该装置允许磁盘驱动器为音圈电机回缩电路供电，同时也减慢旋转盘。 DC-DC转换器将来自旋转盘的反电动势转换成驱动缩回电路的电压。反馈电路基于用于执行缩回功能的可用电压控制DC-DC转换器的切换。重要的是，DC-DC转换器允许磁盘减速，同时为缩回电路提供电力。在一个实施例中，主轴电机的绕组用作DC-DC转换器中的电感器元件。与主轴电机相关的功率MOSFET用作二极管单元和DC-DC转换器的开关单元。电源电容用作DC-DC转换器的输出电容器。反馈电路提供固定的关断时间，其中能量从主轴电机绕组传送到DC-DC转换器输出电容器中，并且允许在主轴电机绕组中构建能量的最小导通时间。还公开了在制动盘时为音圈电动机缩回电路供电的方法。

7. 发明授权

US07350394B1 Zero-g offset identification of an accelerometer employed in a hard disk drive 有权
标题翻译：用于硬盘驱动器的加速度计的零-G偏移识别
公开(公告)号：US07350394B1
公开(公告)日：2008-04-01
申请号：US11292473
申请日：2005-12-02
申请人： William Flynn , Wei Guo , Mark Heimbaugh , Yunfeng Li
发明人： William Flynn , Wei Guo , Mark Heimbaugh , Yunfeng Li
IPC分类号： G01P21/00
CPC分类号： G01P15/0891 , G01P15/18 , G01P21/00 , G11B19/043
摘要： A method is provided for identifying offsets of accelerometers integrated into hard disk drives. More specifically, often, disk drives employ accelerometers that constantly monitor the acceleration felt by the disk drive. Once the accelerations are less than a predetermined threshold, a free fall event is identified and an actuator arm that is generally positioned above the disk is placed in a safe location prior to impact. Accelerometers must be calibrated prior to use such that their inherent errors are identified and factored into the algorithm that identifies free fall. The method provided herein allows for the 0 g offset to be monitored without having to reorient the device being tested, thus saving time and money.
摘要翻译：提供了一种用于识别集成到硬盘驱动器中的加速度计的偏移的方法。更具体地，磁盘驱动器经常使用加速度计，它们不断地监视磁盘驱动器感觉到的加速度。一旦加速度小于预定阈值，则识别出自由落体事件，并且通常位于盘上方的致动器臂在冲击之前被放置在安全位置。加速度计必须在使用之前进行校准，以便确定其固有误差并将其分解到识别自由落体的算法中。本文提供的方法允许监测0g偏移量，而不必重新定向被测试的装置，从而节省时间和金钱。

8. 发明授权

US07085094B1 Interleaved repeatable runout correction for data storage device 失效
标题翻译：用于数据存储设备的交错重复跳动校正
公开(公告)号：US07085094B1
公开(公告)日：2006-08-01
申请号：US10984558
申请日：2004-11-08
申请人： Mark Heimbaugh , Yu Sun
发明人： Mark Heimbaugh , Yu Sun
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A reduction in computational load associated with correction of repeatable runout is provided. Rather than performing DFT for each analyzed frequency at each interrupt, at least some frequencies are not analyzed in the same interrupt period. DFTs for different frequencies may be staggered or interleaved. DFTs for different frequencies may be performed at different rates, preferably, using higher rates for higher frequencies.
摘要翻译：提供了与可重复跳动校正相关联的计算负载的减少。在每次中断时，不要对每个分析频率执行DFT，而是在相同的中断周期内至少对某些频率进行分析。不同频率的DFT可能交错或交错。可以以不同的速率执行用于不同频率的DFT，优选地，对于较高频率使用较高的速率。

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