公开(公告)号：US4974107A

公开(公告)日：1990-11-27

申请号：US259490

申请日：1988-10-18

申请人： Jeffrey Liu ,  Kai C. K. Sun ,  Shand-Ling Mao

发明人： Jeffrey Liu ,  Kai C. K. Sun ,  Shand-Ling Mao

IPC分类号： G11B21/22

CPC分类号： G11B21/22

摘要： A high performance linear actuator for a memory storage device includes a carriage having bearings at opposed sides thereof for engaging a pair of rail members. One of the pair of rail members is preloaded against the respective carriage bearings to provide structural stiffness and increased resonant frequency to the carriage assembly. Another set of bearings straddle a third rail member extending medially between the pair of rail members. An electromagnetic coil motor is secured to the carriage and disposed to engage an E-frame driving magnet, with the force vector of the coil extending parallel to the rail members and proximate to the center of gravity of the carriage assembly. A plurality of read/write heads is secured laterally adjacent to the electromagnetic assembly and extend toward the magnetic storage medium. The E-frame is closed at both ends to prevent flux leakage. An electronic latch under program control engages and immobilizes the carriage whenever the system is not operating.

摘要翻译： 用于存储器装置的高性能线性致动器包括在相对侧具有用于接合一对轨道构件的轴承的滑架。 一对轨道构件中的一个预先装载到相应的滑架轴承上以提供结构刚度并且增加了对滑架组件的共振频率。 另一组轴承跨越在一对轨道构件之间中间延伸的第三轨道构件。 电磁线圈电动机被固定到滑架上并且设置成与E形框架驱动磁体接合，线圈的力矢量平行于轨道构件延伸并且靠近支架组件的重心。 多个读/写头被横向地固定在电磁组件附近并朝向磁存储介质延伸。 E框在两端封闭以防止漏磁。 程序控制下的电子锁存器在系统不工作时接合和固定。

公开(公告)号：US4255694A

公开(公告)日：1981-03-10

申请号：US63639

申请日：1979-08-02

申请人： Lyle E. Morris ,  Kai C. K. Sun

发明人： Lyle E. Morris ,  Kai C. K. Sun

IPC分类号： H02M7/5387 ,  H03K4/06 ,  H03K17/16 ,  H03K17/28 ,  G05B23/02

CPC分类号： H02M7/53871 ,  H03K17/16 ,  H03K17/28 ,  H03K4/06

摘要： A power amplifier is disclosed for controlling the current flow through a load. The power amplifier includes a plurality of switching elements connected in bridge fashion with the load and a first predetermined power source for coupling the load across alternate output terminals of the power source in accordance with the levels of a plurality of control signals respectively applied to the plurality of switching elements. Circuitry is coupled to a second predetermined power source for generating the control signals. Logic circuitry, when enabled, is capable of coupling each of the control signals to the respective switching element. A power monitor circuit compares the voltage level of the second power source with a predetermined reference potential and generates a current disable signal when the voltage level is less than the reference potential. A disable circuit coupled to the power monitor circuit disables the coupling circuit in response to the presence of the current disable signal whereby further current flow through the load is inhibited.

摘要翻译： 公开了用于控制通过负载的电流的功率放大器。 功率放大器包括以桥式方式与负载连接的多个开关元件和第一预定电源，用于根据分别施加到多个电源的多个控制信号的电平将功率耦合到电源的备选输出端 的开关元件。 电路耦合到第二预定电源以产生控制信号。 逻辑电路在使能时能够将每个控制信号耦合到相应的开关元件。 功率监视器电路将第二电源的电压电平与预定的参考电位进行比较，并且当电压电平小于参考电位时产生电流禁用信号。 耦合到功率监视器电路的禁用电路响应于当前禁用信号的存在而禁用耦合电路，从而阻止进一步流过负载的电流。

公开(公告)号：US06320828B1

公开(公告)日：2001-11-20

申请号：US09347373

申请日：1999-07-06

申请人： Kai C. K. Sun

发明人： Kai C. K. Sun

IPC分类号： G11B7085

CPC分类号： G11B7/08541 ,  G11B7/08517 ,  G11B7/08529

摘要： A difference counter in a servo system includes RX signal processing circuitry, TX signal processing circuitry, and a latch. The RX processing circuitry includes a RX z-hold (zero order) circuit, a RX delay circuit coupled thereto, and a RX XOR logic circuit coupled thereto for producing an RX processed signal. The TX processing circuitry includes a TX z-hold circuit, a TX delay circuit coupled thereto, and a TX XOR logic circuit coupled thereto for producing an TX processed signal. The RX and TX processed signals are fed into the latch which, in response, generates a noise-free quarter track signal. Half and full track signals are generated therefrom to further process the signal track information.

摘要翻译： 伺服系统中的差分计数器包括RX信号处理电路，TX信号处理电路和锁存器。 RX处理电路包括RX z保持（零级）电路，与其耦合的RX延迟电路和耦合到其上的RX异或逻辑电路，用于产生RX处理的信号。 TX处理电路包括TX z保持电路，与其耦合的TX延迟电路和耦合到其上的TX XOR逻辑电路，用于产生TX处理的​​信号。 RX和TX处理的​​信号被馈送到锁存器中，作为响应，锁存器产生无噪声的四分之一轨道信号。 从其产生半径和全轨道信号以进一步处理信号轨迹信息。

公开(公告)号：US5870363A

公开(公告)日：1999-02-09

申请号：US736960

申请日：1996-10-25

申请人： Kai C. K. Sun ,  John L. Grimsley

发明人： Kai C. K. Sun ,  John L. Grimsley

IPC分类号： G11B19/24 ,  G11B19/26 ,  G11B19/28 ,  G11B7/00

CPC分类号： G11B19/28 ,  G11B19/24 ,  G11B19/26

摘要： An optical disk drive in which changes in rotational speed are achieved under closed loop control, avoiding significant undershoots or overshoots in speed, increasing access time and reducing power. The speed control is suitable for use in a CLV system, in an CAV/CLV scheme, or in any system in which the speed of the disk must be changed at various times. Feedback from the motor, rather than data read from the disk, determines and controls motor speed during all search operations. The disk motor servo determines the desired motor speed for a target track through a speed profile table. The speed profile table can be designed to accommodate a combination of CAV mode and CLV mode of operation such that the disk drive system can run at the maximum data transfer rate permitted by the data processing electronics, or to minimize power consumption. Through closed loop control, the system ensures that the speed of the motor is quickly and accurately changed to the desired speed, typically by the time the optical pickup reaches a target track during a search operation. The closed loop control also allows the disk drive system to be designed for a lower tolerance level and still achieve jitter-free control. Thus the data rate can be increased due to the lower tolerance required. The access time is minimized because the CD-DSP can begin retrieving data as soon as the target track is reached, since the optical disk will generally already at the desired speed.

摘要翻译： 在闭环控制下实现旋转速度变化的光盘驱动器，避免了显着的下冲或速度过冲，增加了访问时间和降低了功率。 速度控制适用于CLV系统，CAV / CLV方案，或任何必须在不同时间改变磁盘速度的系统。 来自电机的反馈，而不是从磁盘读取的数据，确定并控制所有搜索操作中的电机速度。 磁盘电机伺服通过速度曲线表确定目标轨道所需的电机速度。 速度轮廓表可以设计成适应CAV模式和CLV操作模式的组合，使得磁盘驱动器系统可以以数据处理电子设备允许的最大数据传输速率运行，或者最小化功耗。 通过闭环控制，系统通常在搜索操作期间通过光学拾取器到达目标轨道的时间来确保电机的速度快速准确地改变到所需的速度。 闭环控制还允许将磁盘驱动器系统设计为较低的公差水平，并仍然实现无抖动的控制。 因此，由于所需的较低公差可以增加数据速率。 访问时间最小化，因为一旦达到目标轨道，CD-DSP就可以开始检索数据，因为光盘通常已经以所需的速度。

公开(公告)号：US4864444A

公开(公告)日：1989-09-05

申请号：US259271

申请日：1988-10-18

申请人： Jeffrey Liu ,  Kai C. K. Sun ,  Shand-Ling Mao

发明人： Jeffrey Liu ,  Kai C. K. Sun ,  Shand-Ling Mao

IPC分类号： G11B21/22

CPC分类号： G11B21/22

摘要： A high performance linear actuator for a memory storage device includes a carriage having bearings at opposed sides thereof for engaging a pair of rail members. One of the pair of rail members is preloaded against the respective carriage bearings to provide structural stiffness and increased resonant frequency to the carriage assembly. Another set of bearings straddle a third rail member extending medially between the pair of rail members. An electromagnetic coil motor is secured to the carriage and disposed to engage an E-frame driving magnet, with the force vector of the coil extending parallel to the rail members and proximate to the center of gravity of the carriage assembly. A plurality of read/write heads is secured laterally adjacent to the electromagnetic assembly and extend toward the magnetic storage medium. The E-frame is closed at both ends to prevent flux leakage. An electronic latch under program control engages and immobilizes the carriage whenever the system is not operating.

摘要翻译： 用于存储器装置的高性能线性致动器包括在相对侧具有用于接合一对轨道构件的轴承的滑架。 一对轨道构件中的一个预先装载到相应的滑架轴承上以提供结构刚度并且增加了对滑架组件的共振频率。 另一组轴承跨越在一对轨道构件之间中间延伸的第三轨道构件。 电磁线圈电动机被固定到滑架上并且设置成与E形框架驱动磁体接合，线圈的力矢量平行于轨道构件延伸并且靠近支架组件的重心。 多个读/写头被横向地固定在电磁组件附近并朝向磁存储介质延伸。 E框在两端封闭以防止漏磁。 程序控制下的电子锁存器在系统不工作时接合和固定。

公开(公告)号：US6167011A

公开(公告)日：2000-12-26

申请号：US324990

申请日：1999-06-02

申请人： Kai C. K. Sun, deceased ,  John L. Grimsley

发明人： Kai C. K. Sun, deceased ,  John L. Grimsley

IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B21/08

CPC分类号： G11B7/0903 ,  G11B7/08541 ,  G11B21/083

摘要： Processing of disc-drive pickup signals in a manner that maintains an approximate quadrature relationship. Second order matching filters (353, 303) process pickup signals to remove high frequency components and maintain an approximate quadrature relationship.

摘要翻译： 以维持近似正交关系的方式处理磁盘驱动器拾取信号。 二阶匹配滤波器（353,303）处理拾取信号以去除高频分量并保持近似的正交关系。

公开(公告)号：US5003422A

公开(公告)日：1991-03-26

申请号：US385854

申请日：1989-07-26

申请人： Kai C. K. Sun ,  Rey Chen ,  Edward Lee

发明人： Kai C. K. Sun ,  Rey Chen ,  Edward Lee

IPC分类号： G11B21/22

CPC分类号： G11B21/22

摘要： The present invention provides a magnet positioned to attract and hold a portion of a head arm in a disk drive assembly. The magnet is mounted by a resilient mechanism to a support structure so that there is some overtravel when the head arm assembly contacts the magnet, to dampen the impact and prevent the head arm from bouncing away and maintain contact when the disk drive housing receives an external shock. The present invention is preferably implemented with a swing plate which extends downward from the head arm support structure and is mounted at the top portion by a spring-loaded screw. A magnet is mounted on the bottom portion of the swing plate, and interacts with a permeable iron lock pin coupled to the voice coil of the head arm assembly. A pair of locating pins extend through holes in the mid-portion of the swing plate to guide the movement of the swing plate. The swing plate is levered about a short intermediate plate between it and the support structure which extends approximately one-third of the length of the swing plate. The length of this intermediate plate is chosen to give an optimum compromise between the amount of overtravel in the swing plate and the holding force of the swing plate and magnet arrangement. By bending the swing plate, its maget is moved farther from the read/write area of the disk and improved damping is provided, allowing relaxed tolerances.

摘要翻译： 本发明提供了一种定位成将磁头臂的一部分吸引并保持在磁盘驱动组件中的磁体。 磁体通过弹性机构安装到支撑结构，使得当磁头臂组件接触磁体时，存在一些超行程，以便抑制冲击并防止磁头臂反弹并且当磁盘驱动器壳体接收到外部磁盘时保持接触 休克。 本发明优选地由从头臂支撑结构向下延伸并通过弹簧加载的螺钉安装在顶部的摆动板来实现。 磁体安装在摆动板的底部，并与与头臂组件的音圈耦合的可渗透铁锁销相互作用。 一对定位销延伸穿过摆动板的中部的孔，以引导摇摆板的运动。 摇摆板围绕其间延伸约摆动板长度的三分之一的支撑结构之间的短中间板。 选择该中间板的长度以在摆动板中的超程量与摆动板和磁体布置的保持力之间给出最佳的折中。 通过弯曲摇摆板，其磁铁从磁盘的读/写区域移动得更远，并提供改进的阻尼，允许松弛的公差。

公开(公告)号：US4290000A

公开(公告)日：1981-09-15

申请号：US063638

申请日：1979-08-02

申请人： Kai C. K. Sun

发明人： Kai C. K. Sun

IPC分类号： G05B11/28 ,  G05B9/02

CPC分类号： G05B11/28

摘要： A power amplifier is disclosed for controlling the current flow through a load, such as a d-c servo motor. The amplifier includes a plurality of switching elements connected in bridge fashion with the load and a predetermined power source for coupling the load across alternate output terminals of the power source in accordance with the levels of a plurality of control signals respectively coupled to the plurality of switching elements. Logic circuitry, when enabled, couples each of the control signals to their respective switching elements for controlling same. Sensing circuitry is coupled to the load for generating an actual current signal indicative of the actual level of current flow through the load. A current limiter is coupled to the sensing circuitry for comparing the actual current signal with high and low level limit signals and for generating a current disable signal when either the actual current signal exceeds the high limit signal or the low limit signal exceeds the actual current signal. Disable circuitry coupled to the current limiter disables the logic circuitry when a true current disable signal is present.

摘要翻译： 公开了一种用于控制通过诸如d-c伺服电机的负载的电流的功率放大器。 该放大器包括多个开关元件，其以桥式方式与负载相连接，并且用于根据分别耦合到多个开关的多个控制信号的电平，将电源耦合到电源的交替输出端上的预定电源 元素。 逻辑电路在使能时将每个控制信号耦合到它们各自的开关元件以进行控制。 感测电路耦合到负载，用于产生指示通过负载的电流的实际电平的实际电流信号。 电流限制器耦合到感测电路，用于将实际电流信号与高电平和低电平限制信号进行比较，并且当实际电流信号超过上限信号或者下限信号超过实际电流信号时产生电流禁用信号 。 耦合到限流器的禁止电路在存在真电流禁用信号时禁用逻辑电路。

公开(公告)号：US06239934B1

公开(公告)日：2001-05-29

申请号：US09111361

申请日：1998-07-06

申请人： Kai C. K. Sun ,  James A. Herbst ,  Chih-Hsiung Chang ,  Mansur B. Kiadeh

发明人： Kai C. K. Sun ,  James A. Herbst ,  Chih-Hsiung Chang ,  Mansur B. Kiadeh

IPC分类号： G11B15087

CPC分类号： G11B5/59688 ,  G11B5/012 ,  G11B5/02 ,  G11B5/024 ,  G11B5/4886 ,  G11B5/5526 ,  G11B5/5534 ,  G11B5/59627 ,  G11B5/59644 ,  G11B19/00 ,  G11B19/02 ,  G11B19/12 ,  G11B23/0302 ,  G11B23/0303 ,  G11B23/031 ,  G11B23/0318

摘要： A higher-capacity disk drive system and a higher-capacity removable disk cartridge adapted for downward compatibility with older, lower-capacity disk drive systems, wherein a unique control information format is stored on higher-capacity removable disk cartridges to distinguish them from older, lower-capacity removable disk cartridges and thereby to facilitate cartridge capacity recognition by the higher-capacity disk drive system. Upon recognizing the capacity of an inserted removable disk cartridge, the higher-capacity disk drive system can read and write data to the removable disk cartridge such that data which it stores on a lower-capacity removable disk cartridge may be read by lower-capacity disk drive systems.

摘要翻译： 更高容量的磁盘驱动器系统和更高容量的可移动磁盘盒适用于与旧的较低容量的磁盘驱动器系统的向下兼容性，其中独特的控制信息格式存储在较高容量的可移动磁盘盒上，以将其与旧的， 较低容量的可移动磁盘盒，从而便于高容量磁盘驱动器系统的磁带盒容量识别。 在识别插入的可移动磁盘盒的容量时，高容量磁盘驱动器系统可以将数据读取和写入到可移动磁盘盒，使得存储在低容量可移动磁盘盒上的数据可以被较低容量的磁盘读取 驱动系统。

公开(公告)号：US4260936A

公开(公告)日：1981-04-07

申请号：US63637

申请日：1979-08-02

申请人： Kai C. K. Sun

发明人： Kai C. K. Sun

IPC分类号： G05F1/00 ,  G05D3/18 ,  H02M7/5387 ,  H02P7/288 ,  H03K4/06 ,  G05B11/28

CPC分类号： G05D3/18 ,  H02M7/53871 ,  H03K4/06

摘要： Apparatus is disclosed for controlling the current flow through first and second loads, such as motors, to thereby control the direction and speed of the motors. The apparatus comprises a first power amplifier connected to the first motor and including an oscillator for generating an oscillator signal having a predetermined frequency of oscillation and circuitry responsive to the oscillator signal for developing a first control current through the first motor. A second power amplifier is connected to the second motor and includes circuitry responsive to the same oscillator signal for developing a second control current through the second motor. The oscillator signal is coupled from the oscillator of the first power amplifier to the circuitry of the second power amplifier, whereby the second power amplifier is slaved to the first power amplifier.

摘要翻译： 公开了用于控制通过诸如电动机的第一和第二负载的电流的装置，从而控制电动机的方向和速度。 该装置包括连接到第一电动机的第一功率放大器，并且包括用于产生具有预定振荡频率的振荡器信号的振荡器和响应于振荡器信号的电路的振荡器，用于产生通过第一电动机的第一控制电流。 第二功率放大器连接到第二电动机，并且包括响应于相同振荡器信号的电路，用于开发通过第二电动机的第二控制电流。 振荡器信号从第一功率放大器的振荡器耦合到第二功率放大器的电路，由此第二功率放大器从属于第一功率放大器。