公开(公告)号：US06560057B1

公开(公告)日：2003-05-06

申请号：US09303081

申请日：1999-04-30

申请人： Erno Hilbrand Klaassen ,  Bryan Scott Rowan

发明人： Erno Hilbrand Klaassen ,  Bryan Scott Rowan

IPC分类号： G11B2102

CPC分类号： G11B21/12

摘要： A disk drive includes a read/write head mounted on an actuator, a disk having an inner diameter region and an outer diameter region, the head being radially movable by the actuator between the inner diameter region and the outer diameter region. An unload ramp is positioned at the outer diameter region. A controller outputs control signals upon sensing a power down condition. A feedback circuit is adapted to sense a back emf generated by the actuator and to use the back emf to apply a counter-acting voltage to the actuator that tends to bring the actuator to a stop. A switch is responsive to the control signals to (i) connect the feedback circuit to the actuator to enable the actuator to be brought to a stop while the disk continues to rotate and (ii) for then causing the actuator to move the head to the unload ramp. The switch further applies a voltage which causes the actuator to bring the head to the inner diameter region of the disk, before causing the actuator to move the head to the unload ramp.

摘要翻译： 磁盘驱动器包括安装在致动器上的读/写头，具有内径区域和外径区域的磁盘，磁头可由致动器在内径区域和外径区域之间径向移动。 卸载斜坡位于外径区域。 控制器在感测掉电状态时输出控制信号。 反馈电路适于感测由致动器产生的反电动势，并且使用反电动势向致动器施加反作用电压，该致动器倾向于使致动器停止。 开关响应于控制信号以（i）将反馈电路连接到致动器，以使得致动器能够在盘继续旋转时停止，并且（ii）然后使致动器将头部移动到 卸载斜坡 在使致动器将头部移动到卸载斜坡之前，开关进一步施加使致动器将磁头带到盘的内径区域的电压。

公开(公告)号：US06567232B1

公开(公告)日：2003-05-20

申请号：US09430212

申请日：1999-10-29

申请人： Erno Hilbrand Klaassen

发明人： Erno Hilbrand Klaassen

IPC分类号： G11B2102

CPC分类号： G11B21/12

摘要： A self-sufficient electronic device to retract and park a voice coil actuator in a resistive parking position in,hard disk drives whose kinetic energy obtained from the rotating disk stack is not sufficient to be utilized as an energy source for the power-off retract and parking of the actuator. The invention uses electric energy stored in one or more capacitors to perform the necessary tasks. An initial electrical pulse is imposed on the actuator to propel the actuator towards a resistive parking ramp. In the event the actuator bounces off a crash stop barrier a bounce detector recognizes a polarity change of a reactive voice coil voltage and gives a signal for a secondary energy pulse to return the bouncing actuator to the resistive parking position. The simple logical concept of the device conserves space and energy making it suitable for miniature hard disk drives.

摘要翻译： 一种用于将音圈致动器收回并停放在电阻停车位置的自足电子设备，其中从旋转盘堆积获得的动能不足以用作用于断电回缩的能量源的硬盘驱动器， 停车执行器。 本发明使用存储在一个或多个电容器中的电能来执行必要的任务。 致动器上施加初始电脉冲以将致动器推向电阻停车斜坡。 在执行器弹起碰撞停止挡板的情况下，反弹检测器识别出反应式音圈电压的极性变化，并且给出用于二次能量脉冲的信号以将跳动致动器返回到阻力停车位置。 该设备的简单逻辑概念节省空间和能量，使其适用于微型硬盘驱动器。

公开(公告)号：US06316898B1

公开(公告)日：2001-11-13

申请号：US09430517

申请日：1999-10-29

申请人： Thomas Robert Albrecht ,  Erno Hilbrand Klaassen

发明人： Thomas Robert Albrecht ,  Erno Hilbrand Klaassen

IPC分类号： G11B554

CPC分类号： G11B5/4813 ,  G11B21/025 ,  G11B21/12 ,  H02P25/034

摘要： A capacitor powered electronic emergency device retracts and parks an actuator into a resistive parking position with a crash stop barrier. Due to variations of the kinetic status of the actuator at the begin of the retraction, the actuator reaches the resistive parking position with different velocities, which can be at a level that causes the actuator to bounce off the crash stop barrier. A modulating pulsing of the energy flow extends the discharge time of the capacitor long enough to provide sufficient energy to compensate an eventual bounce-off. The use of transistors in the device keeps the internal energy consumption low. An increase of the pulsing frequency in dependence on the capacitor voltage results in a high average current flow.

摘要翻译： 电容器电力电子应急装置将致动器缩回并停放在具有碰撞停止挡板的阻力停车位置。 由于在开始开始时致动器的动力学状态的变化，致动器以不同的速度到达阻力停车位置，这可以在使致动器从碰撞停止挡板反弹的水平上。 能量流的调制脉冲使电容器的放电时间延长到足以提供足够的能量来补偿最终的反弹。 在器件中使用晶体管会使内部能量消耗降低。 根据电容器电压的脉冲频率的增加导致高的平均电流流动。

公开(公告)号：US06400534B1

公开(公告)日：2002-06-04

申请号：US09533722

申请日：2000-03-21

申请人： Erno Hilbrand Klaassen

发明人： Erno Hilbrand Klaassen

IPC分类号： G11B533

CPC分类号： G11B5/3903 ,  G11B5/40 ,  Y10S977/934

摘要： In a magnetic read/write assembly, the magnetoresistive (G)MR sensor element is protected against electrostatic discharge (ESD) and electrical overstress (EOS) by using a low resistance bypass. The low resistance bypass shunts current away from the magnetoresistive sensor element during an ESD or EOS event. This low resistance bypass is made up of two or more resistors connected in series, and positioned in parallel to the magnetoresistive sensor element. The use of electronic circuitry to temporarily disable this low resistance bypass allows the magnetoresistive sensor element to be tested during manufacturing. The low resistance bypass is removed prior to placing the (G)MR head into operation in the magnetic storage system or at any other desired step in the manufacturing process.

摘要翻译： 在磁读/写组件中，磁阻（G）MR传感器元件通过使用低电阻旁路来防止静电放电（ESD）和电应力（EOS）。 在ESD或EOS事件期间，低电阻旁路将电流从磁阻传感器元件分流。 该低电阻旁路由两个或更多个串联连接的电阻器组成，并且与磁阻传感器元件平行。 使用电子电路暂时禁用该低电阻旁路允许在制造期间测试磁阻传感器元件。 在将（G）MR磁头放置在磁存储系统中或在制造过程中的任何其它期望步骤之前，移除低电阻旁路。

公开(公告)号：US06344949B1

公开(公告)日：2002-02-05

申请号：US09352538

申请日：1999-07-13

申请人： Thomas Robert Albrecht ,  Robert Edward Fontana, Jr. ,  Prakash Kasiraj ,  Erno Hilbrand Klaassen ,  Robert Nolan Payne ,  Timothy Clark Reiley

发明人： Thomas Robert Albrecht ,  Robert Edward Fontana, Jr. ,  Prakash Kasiraj ,  Erno Hilbrand Klaassen ,  Robert Nolan Payne ,  Timothy Clark Reiley

IPC分类号： G11B1732

CPC分类号： G11B5/486 ,  G11B5/4833 ,  G11B5/6064 ,  Y10S977/934

摘要： Flying height Adjustment for Air Bearing Sliders An air bearing slider for sliding over a medium surface of a recording medium and having an air bearing surface facing the disk surface, a back surface perpendicular to the air bearing surface and a head at the back surface. During operation the head is maintained at a flying height above the disk surface with the aid of a flying height adjustment mechanism consisting of one or more ducts, each having an inlet at the air bearing surface and an outlet at the back surface. A valve mechanism controls an air flow through the duct or ducts by opening and closing the valve or valves together or independently. Alternatively, a deformable surface feature located on the back surface of the slider is used to alter the air flow to thus control the flying height. The mechanism of the invention allows one to achieve accurate flying height control in a range between 5 and 50 nm and between 0 nm and 15 nm as required for near-field or contact disk drives. By adjusting the flying height the contact can be limited to times of reading or writing data to the disk, thereby lowering the total contact time thereby reducing head/disk interface wear.

摘要翻译： 空气轴承滑块的飞行高度调整用于在记录介质的介质表面上滑动并具有面向盘表面的空气轴承表面的空气轴承滑块，垂直于空气轴承表面的后表面和在后表面处的头部。 在操作期间，借助于由一个或多个管道组成的飞行高度调节机构，将头部保持在盘表面上方的飞行高度，每个管道在空气轴承表面具有入口和在后表面处的出口。 阀机构通过一起或独立地打开和关闭阀或阀来控制通过管道或管道的空气流。 或者，位于滑块后表面的可变形表面特征用于改变气流，从而控制飞行高度。 本发明的机构允许根据近场或接触盘驱动器的需要，在5至50nm之间和0nm至15nm的范围内实现精确的飞行高度控制。 通过调整飞行高度，可以将触点限制在读取或写入数据的次数，从而降低总接触时间，从而减少磁头/磁盘接口磨损。