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28 条记录 (耗时 0.04 秒)

    Track seeking using a track following loop
    22.
    发明授权
    Track seeking using a track following loop 失效
    追踪使用跟踪循环

    公开(公告)号：US4839876A

    公开(公告)日：1989-06-13

    申请号：US123675

    申请日：1987-11-23

    申请人： Alan A. Fennema

    发明人： Alan A. Fennema

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

    CPC分类号： G11B21/083 ,  G11B7/08517

    摘要： An optical disk recorder includes a position servo control loop for causing a beam of radiation to faithfully follow a track on the disk, jump from a current track to an adjacent track or to a small number of tracks away from the current track. Operation of the position servo loop is altered by selectively reversing the phase of a differentiated position error signal and integrating the differentiated position error signal for comparison with a sawtooth signal for moving the beam of radiation from the current track to an immediately adjacent track under continuous position servo control. Upon reaching the adjacent track, the sawtooth signal returns to a reference potential for initiating track following. The servo error between the integrated differentiated position error signal and the sawtooth signal is sufficiently small such that relaxation of the sawtooth signal does not cause any significant perturbations in the positioning servo loop operation. A velocity long seek servo can be substituted for the position servo loop for more rapid long seeks.

    Self-writing servo and clock fields on a recording medium
    24.
    发明授权
    Self-writing servo and clock fields on a recording medium 有权
    自动写入伺服和时钟字段在记录介质上

    公开(公告)号：US06785075B2

    公开(公告)日：2004-08-31

    申请号：US09915935

    申请日：2001-07-26

    申请人： Lawrence M. Bryant ,  Gabor Szïta ,  Alan A. Fennema ,  Karl A. Belser ,  Robert D. Murphy

    发明人： Lawrence M. Bryant ,  Gabor Szïta ,  Alan A. Fennema ,  Karl A. Belser ,  Robert D. Murphy

    IPC分类号： G11B509

    CPC分类号： G11B20/1403 ,  G11B5/5534 ,  G11B5/59633 ,  G11B21/083 ,  G11B21/106

    摘要： A disc drive with an information portion previously written on a rotatable disc surface, a servo write clock generator phase lock loop circuit controlling timing for writing a reference mark to the rotatable disc surface in substantial time alignment and phase and frequency coherent with the information portion previously written to the rotatable disc surface, a servo write clock generator phase lock loop circuit controlling timing for writing the reference mark, a pulse detector circuit for creating logic level signals from the reference mark, a pattern generator for generating reference mark write signals from the logic level signals, a memory buffer for storing radial position correction tables and values for writing the reference mark, and a self-servo control and sequencing circuit synchronizing timing signals for writing the reference mark to rotatable disc surface of disc drive.

    摘要翻译： 具有先前写在可旋转盘表面上的信息部分的磁盘驱动器，伺服写时钟发生器锁相环电路，控制在基本时间对准中将参考标记写入可旋转盘表面的定时，以及与先前信息部分相干的相位和频率 写入可旋转盘表面的伺服写入时钟发生器锁相环电路控制用于写入参考标记的定时，用于从参考标记产生逻辑电平信号的脉冲检测器电路，用于从逻辑产生参考标记写入信号的模式发生器 电平信号，用于存储径向位置校正表的存储器缓冲器和用于写入参考标记的值，以及自伺服控制和排序电路，用于将用于将参考标记写入盘驱动器的可旋转盘表面的定时信号同步。

    System and method of efficient servo sector encoding
    25.
    发明授权
    System and method of efficient servo sector encoding 失效
    高效伺服扇区编码的系统和方法

    公开(公告)号：US06345021B1

    公开(公告)日：2002-02-05

    申请号：US09189234

    申请日：1998-11-10

    申请人： Karl A. Belser ,  Alan A. Fennema

    发明人： Karl A. Belser ,  Alan A. Fennema

    IPC分类号： G11B700

    CPC分类号： G11B11/10578 ,  G11B5/59677 ,  G11B11/10565 ,  G11B2005/0021

    摘要： A system and method for encoding servo sector information in a nonvolatile data storage and retrieval system using rotating recording disks. Servo sectors are angularly-spaced approximately radial regions reserved for position reference and tracking adjustment information. Servo timing marks including means for detecting defects on the recording surface, encoded track address and sector address data, and position error signal blocks are permanently fabricated into a number of servo sectors. The present invention helps the storage system controller locate, certify, and follow any particular track and sector while maximizing the amount of disk surface area available for data storage and retrieval.

    摘要翻译： 一种用于使用旋转记录盘在非易失性数据存储和检索系统中对伺服扇区信息进行编码的系统和方法。 伺服扇区为保留位置参考和跟踪调整信息的角度间隔近似径向区域。 包括用于检测记录表面上的缺陷的装置，编码的轨道地址和扇区地址数据以及位置误差信号块的伺服定时标记被永久地制成多个伺服扇区。 本发明有助于存储系统控制器定位，认证和跟踪任何特定的轨道和扇区，同时最大化可用于数据存储和检索的磁盘表面积的量。

    Optical system for two-dimensional positioning of light beams
    26.
    发明授权
    Optical system for two-dimensional positioning of light beams 失效
    光束二维定位光学系统

    公开(公告)号：US5974019A

    公开(公告)日：1999-10-26

    申请号：US061839

    申请日：1998-04-16

    申请人： Karl A. Belser ,  Joseph Drake ,  John H. Jerman ,  Alan A. Fennema

    发明人： Karl A. Belser ,  Joseph Drake ,  John H. Jerman ,  Alan A. Fennema

    IPC分类号： G02B6/35 ,  G02B6/42 ,  G11B7/12 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

    CPC分类号： G02B6/422 ,  G11B11/10543 ,  G11B7/12 ,  G11B7/122 ,  G11B7/1353 ,  G11B7/1384 ,  G02B6/4222 ,  G11B11/1058

    摘要： A positioning system for selectively directing a first beam of light towards a destination and a second beam of light towards a first diffractive optic. The first beam of light and the second beam of light traverse a substantially co-linear optical path. The first diffractive optic diffracts the second beam of light into a plurality of optical spots. The second beam of light comprising the plurality of optical spots is directed onto a second diffractive optic. A change in position of the plurality of optical spots relative to the second diffractive optic is sensed in a reflection of the second beam of light by a detection element and representative signals are derived thereof. The signals are coupled to a directing assembly, which directs the first beam of light towards the destination.

    摘要翻译： 一种定位系统，用于选择性地将第一光束朝向目的地引导，而第二光束朝向第一衍射光学器件。 第一光束和第二光束穿过基本上共线的光路。 第一衍射光将第二光束衍射成多个光点。 包括多个光点的第二光束被引导到第二衍射光学元件上。 通过检测元件在第二光束的反射中感测到多个光点相对于第二衍射光学器件的位置变化，并且导出代表性的信号。 信号耦合到引导组件，该引导组件将第一光束引向目的地。

    Optical disk drive with multiple data layer disk and system for focusing the optical beam
    27.
    发明授权
    Optical disk drive with multiple data layer disk and system for focusing the optical beam 失效
    具有多个数据层磁盘的光盘驱动器和用于聚焦光束的系统

    公开(公告)号：US5499231A

    公开(公告)日：1996-03-12

    申请号：US339626

    申请日：1994-11-15

    申请人： Alan A. Fennema ,  Wayne I. Imaino ,  Hal J. Rosen

    发明人： Alan A. Fennema ,  Wayne I. Imaino ,  Hal J. Rosen

    IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/09

    CPC分类号： G11B7/0037 ,  G11B7/0945 ,  G11B2007/0013

    摘要： An optical disk drive with a multiple data layer optical disk uses computed axial velocity values of the data layers to optimize the interlayer transition of the focused light beam. In the preferred embodiment, the axial velocities of the data layers are computed for a set of radial and angular positions on the data layer surfaces using one of several techniques. The data layer axial velocity values are computed from the measured current values to the voice coil motor focus actuator or from the output of the detector that generates the focus error signal (FES). A routine is run at disk drive startup, or at various times during disk drive operation, to measure the coil current or FES at different radial and angular positions and compute the axial velocity values. The computed axial velocity values are then mapped into memory storage according to addresses corresponding to their radial and angular positions. When it is desired to move the focused light beam from one data layer (the initial or take-off data layer) to another data layer (the final or target data layer) the computed axial velocity values are retrieved for the radial and angular positions nearest the take-off and target sectors on the respective data layers. These velocity values are then used to modify the acceleration profile of the focusing lens so that the focused light beam arrives at the desired position on the target data layer with a velocity close to the target data layer axial velocity.

    摘要翻译： 具有多数据层光盘的光盘驱动器使用计算出的数据层的轴向速度值来优化聚焦光束的层间转变。 在优选实施例中，使用几种技术之一，针对数据层表面上的一组径向和角度位置来计算数据层的轴向速度。 从测量的电流值到音圈电动机聚焦致动器或从产生聚焦误差信号（FES）的检测器的输出计算数据层轴向速度值。 在磁盘驱动器启动或在磁盘驱动器操作期间的不同时间运行例程来测量不同径向和角位置处的线圈电流或FES，并计算轴向速度值。 然后根据与其径向和角度位置对应的地址，将计算的轴向速度值映射到存储器存储器中。 当希望将聚焦的光束从一个数据层（初始或起飞数据层）移动到另一个数据层（最终或目标数据层）时，针对最近的径向和角度位置检索计算出的轴向速度值 各个数据层的起飞和目标部门。 然后使用这些速度值来修改聚焦透镜的加速度分布，使得聚焦光束以接近目标数据层轴向速度的速度到达目标数据层上的期望位置。