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1. 发明授权

US06661614B2 Magnetless actuator for disc drive 失效
公开(公告)号：US06661614B2
公开(公告)日：2003-12-09
申请号：US09919547
申请日：2001-07-31
申请人： Tak Koon Ooi , Kevin Arthur Gomez , Xiong Liu , Kwee Teck Say , Choon Kiat Lim
发明人： Tak Koon Ooi , Kevin Arthur Gomez , Xiong Liu , Kwee Teck Say , Choon Kiat Lim
IPC分类号： G11B555
CPC分类号： G11B5/5569
摘要： A magnetless rotary actuator for carrying one or more read/write heads across a data bearing medium, the rotary actuator comprising: a stator including a plurality of independently controllable flux generating means for directing flux between the stator and a rotor; the rotor including means for presenting discrete regions of low magnetic reluctance to the controllable flux generating means; torque coupling means for transmitting operative torque from the rotor to the read/write head; and pivot means for supporting the torque coupling means.

2. 发明授权

US06574061B1 Method and apparatus for run-time temperature compensation of giant magnetoresistive head bias current 失效
标题翻译：巨磁阻头偏置电流的运行时温度补偿方法和装置
公开(公告)号：US06574061B1
公开(公告)日：2003-06-03
申请号：US09610202
申请日：2000-07-03
申请人： Khong Mau Ling , Lian Chong Kwek , Kwee Teck Say , Myint Ngwe , Kah Liang Gan , Beng Wee Quak
发明人： Khong Mau Ling , Lian Chong Kwek , Kwee Teck Say , Myint Ngwe , Kah Liang Gan , Beng Wee Quak
IPC分类号： G11B503
CPC分类号： G11B5/012 , G11B5/02 , G11B5/035 , G11B33/14 , G11B2005/0018 , G11B2005/3996
摘要： A process of run-time temperature compensating bias current to a magnetoresistive read head in which a plurality of temperature ranges are defined with associated bias current values. A hysteresis range of temperatures is defined for each boundary between temperature ranges. A bias current value is selected based on the temperature range of the sensed temperature. The process is repeated. If the sensed temperature is in a different temperature range from that previously identified and the measured temperature is not in a hysteresis range at the boundary with the temperature range previously identified, the selected bias current value is based on the presently identified temperature range. If the sensed temperature is in a hysteresis range at the boundary with the temperature range previously.
摘要翻译：对磁阻读取头的运行时温度补偿偏置电流的过程，其中多个温度范围被定义为具有相关联的偏置电流值。为温度范围内的每个边界定义温度的滞后范围。基于感测温度的温度范围选择偏置电流值。重复该过程。如果检测到的温度处于与先前识别的温度不同的温度范围内，并且测量的温度在与先前识别的温度范围的边界处不在滞后范围内，则所选择的偏置电流值基于当前识别的温度范围。如果检测到的温度在先前与温度范围的边界处于滞后范围。

3. 发明授权

US06678114B2 Disc biasing scheme to minimize single plane unbalance for hard disc drives 失效
标题翻译：光盘偏置方案，以最大限度地减少硬盘驱动器的单平面不平衡
公开(公告)号：US06678114B2
公开(公告)日：2004-01-13
申请号：US09785670
申请日：2001-02-16
申请人： Niroot Jicrapipalanakul , Victor Chi Siang Choo , Poh Lye Lim , Michael Joo Chiang Toh , Kwee Teck Say , Beng Wee Quak , Chee Suan Low
发明人： Niroot Jicrapipalanakul , Victor Chi Siang Choo , Poh Lye Lim , Michael Joo Chiang Toh , Kwee Teck Say , Beng Wee Quak , Chee Suan Low
IPC分类号： G11B2504
CPC分类号： G11B19/2009 , G11B17/0287 , G11B23/0035 , G11B33/08
摘要： A method for minimizing unbalance in the disc pack of a disc drive where the unbalance of the spindle motor is quantified and incorporated into the biasing assembly of the disc pack. In the assembly process, the discs are biased in a manner such that the unbalance of the spindle motor is considered.
摘要翻译：一种用于最小化磁盘驱动器的盘组件中的不平衡的方法，其中主轴电动机的不平衡被量化并结合到盘组件的偏置组件中。在组装过程中，盘以偏心主轴电动机的不平衡的方式被偏压。

4. 发明授权

US06751036B2 Tuning track density for data storage device 有权
标题翻译：调整数据存储设备的磁道密度
公开(公告)号：US06751036B2
公开(公告)日：2004-06-15
申请号：US09902428
申请日：2001-07-10
申请人： Beng Wee Quak , KokHoe Chia , Kwee Teck Say , KianKeong Ooi , Soon Wah Leow , Song Wee Teo
发明人： Beng Wee Quak , KokHoe Chia , Kwee Teck Say , KianKeong Ooi , Soon Wah Leow , Song Wee Teo
IPC分类号： G11B509
CPC分类号： G11B27/36 , G11B5/012 , G11B20/1816 , G11B33/10 , G11B2005/001 , G11B2005/0013 , G11B2220/20
摘要： A data storage device has a plurality of head/surface combinations with different data track densities on at least two surfaces. A minimum head quality is established for the data storage apparatus. Head quality is identified for each of the heads at each of a plurality of track densities. A tuned track density is selected for each surface based on the track density that corresponds to a head quality.
摘要翻译：数据存储装置具有在至少两个表面上具有不同数据磁道密度的多个头/表面组合。为数据存储装置建立最小的头部质量。在多个磁道密度中的每一个处识别每个磁头的磁头质量。基于对应于头部质量的轨道密度，为每个表面选择调谐轨道密度。

5. 发明授权

US06690532B1 Self-diagnostic MR head recovery 有权
标题翻译：自诊断MR头恢复
公开(公告)号：US06690532B1
公开(公告)日：2004-02-10
申请号：US09539796
申请日：2000-03-31
申请人： Swee Kieong Choo , Jack Ming Teng , Hwee Peng Teo , Myint Ngwe , Beng Wee Quak , Kwee Teck Say
发明人： Swee Kieong Choo , Jack Ming Teng , Hwee Peng Teo , Myint Ngwe , Beng Wee Quak , Kwee Teck Say
IPC分类号： G11B2102
CPC分类号： G11B5/012 , G11B5/02
摘要： A method and apparatus for detecting and recovering from head instability in a magneto-resistive (MR) transducer head of a disc-drive system. A head-instability-recovery circuit is described for use in disc drive to recover from a head-instability condition of an MR transducer head. This circuit includes a controller and a current source that supplies current to the MR head. The current source is controlled to supply a nominal amount of current to the MR head when operating in a normal mode, and to supply one or more current bursts having a current above the nominal supply current in order to recover from the head-instability condition. Also described is a method for recovering from a transducer-instability condition of an MR transducer of a disc drive, including detecting a situation that indicates a head-instability-recovery operation is desired, and performing the head-instability-recovery operation.
摘要翻译：一种用于在盘驱动系统的磁阻（MR）换能器头中的头部不稳定性中检测和恢复的方法和装置。描述磁头不稳定性恢复电路用于磁盘驱动器以从MR换能器头的磁头不稳定状态恢复。该电路包括向MR磁头供应电流的控制器和电流源。控制电流源以在正常模式下工作时向MR磁头提供额定电流量，并且提供具有高于额定电源电流的电流的一个或多个电流脉冲串，以便从头部不稳定状态恢复。还描述了一种用于从盘驱动器的MR换能器的换能器不稳定状态恢复的方法，其包括检测指示头部不稳定性恢复操作期望的情况，以及执行头部不稳定性恢复操作。

6. 发明申请

US20080048595A1 Active brake for spindle motor 审中-公开
标题翻译：主轴电机主动制动
公开(公告)号：US20080048595A1
公开(公告)日：2008-02-28
申请号：US11507748
申请日：2006-08-22
申请人： JiaHong Shu , Tze Ming Jimmy Pang , Larry Robert Hedding , KianKeong Ooi , JuneChristian Ang , Kwee Teck Say , Danny Joe Kastler
发明人： JiaHong Shu , Tze Ming Jimmy Pang , Larry Robert Hedding , KianKeong Ooi , JuneChristian Ang , Kwee Teck Say , Danny Joe Kastler
IPC分类号： H02P3/00
CPC分类号： G11B19/20 , G11B19/04
摘要： A reverse torque, forward commutation motor driver system for a phased motor rapidly decelerates or “brakes” the motor by exciting, in sequence, a complementary excitation signal in each normal commutation state of the forward state machine, thereby providing an active braking effect. After active braking reduces the rotational velocity of the motor below a threshold, a dynamic braking technique can replace the active braking, wherein high-side drivers are set to an opposite voltage as compared to low-side drivers.
摘要翻译：用于相位电动机的反向扭矩正向换向电动机驱动器系统通过在前进状态机的每个正常换向状态中依次激励一个互补的激励信号来快速减速或“制动”电动机，由此提供主动的制动效果。在主动制动之后，将电动机的转速降低到阈值以下，动态制动技术可以取代主动制动，其中与低侧驱动器相比，高侧驱动器被设置为相反的电压。

7. 发明授权

US06728053B2 Method and apparatus to reduce retry redundancy during read operations 有权
标题翻译：在读取操作期间减少重试冗余的方法和装置
公开(公告)号：US06728053B2
公开(公告)日：2004-04-27
申请号：US09897802
申请日：2001-06-29
申请人： SweeKieong Choo , WeiLoon Ng , BengWee Quak , Wesley WingHung Chan , Kwee Teck Say
发明人： SweeKieong Choo , WeiLoon Ng , BengWee Quak , Wesley WingHung Chan , Kwee Teck Say
IPC分类号： G11B509
CPC分类号： G11B19/04 , G11B5/012 , G11B20/1816 , G11B2020/183
摘要： A method and apparatus for reducing retry redundancy during disc read operations in a disc drive system are provided in which a number of physical sectors to be read from the disc during read operations is first determined. An attempt is then made to read all sectors of the number of sectors during a first disc revolution. Failed sectors of the number of sectors during the first disc revolution are also identified. A retry cycle is then performed on the failed sectors during a second disc revolution following the completion of the attempt to read all sectors of the number of sectors during the first revolution.
摘要翻译：提供一种用于在盘驱动系统中的盘读取操作期间减少重试冗余的方法和装置，其中首先确定在读操作期间从盘读取的多个物理扇区。然后，尝试在第一盘旋转期间读取扇区数的所有扇区。也确定了在第一盘旋转期间扇区数量的失败扇区。然后在完成在第一次旋转期间读取扇区数量的所有扇区的尝试结束之后的第二次盘片转动期间，对故障扇区进行重试循环。

8. 发明授权

US06633442B2 Adjusting track density and bit density to provide limited excess capacity in a storage device 失效
标题翻译：调整轨道密度和位密度，以在存储设备中提供有限的过剩容量
公开(公告)号：US06633442B2
公开(公告)日：2003-10-14
申请号：US09873579
申请日：2001-06-04
申请人： BengWee Quak , KokHoe Chia , Tien Hiong Lee , Teck Khoon Lim , Kwee Teck Say
发明人： BengWee Quak , KokHoe Chia , Tien Hiong Lee , Teck Khoon Lim , Kwee Teck Say
IPC分类号： G11B2736
CPC分类号： G11B27/36 , G11B5/59633 , G11B20/10 , G11B2220/20
摘要： A method sets bit densities and track densities for a plurality of heads in a data storage device. The method includes determining an initial bit density and an initial track density for each head. An initial total capacity for the storage device is determined based on the initial track densities and the initial bit densities. A desired capacity for the storage device is selected and the initial total capacity and the desired capacity are compared. One of either a bit density or a track density is then adjusted so that the data storage device has an adjusted capacity that provides some excess capacity over the desired capacity where the excess capacity is less than any excess capacity that was present between the initial capacity and the desired capacity. A data storage device formed through this method is also provided.
摘要翻译：一种方法设置数据存储装置中的多个磁头的位密度和磁道密度。该方法包括确定每个头部的初始位密度和初始轨道密度。基于初始轨道密度和初始比特密度来确定存储设备的初始总容量。选择存储设备的期望容量，并比较初始总容量和期望容量。然后调整位密度或磁道密度之一，使得数据存储设备具有经调整的容量，其在超过容量小于存在于初始容量和初始容量之间的任何过剩容量的期望容量上提供一些过剩容量所需容量。还提供了通过该方法形成的数据存储设备。

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