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27 条记录 (耗时 0.029 秒)

    Individual MR transducer head/disk/channel adaptive bias current system
    2.
    发明授权
    Individual MR transducer head/disk/channel adaptive bias current system 失效
    单个MR换能器头/磁盘/通道自适应偏置电流系统

    公开(公告)号：US5412518A

    公开(公告)日：1995-05-02

    申请号：US168630

    申请日：1993-12-16

    申请人： Jodie A. Christner ,  Earl A. Cunningham ,  Gregory J. Kerwin ,  Joe M. Poss

    发明人： Jodie A. Christner ,  Earl A. Cunningham ,  Gregory J. Kerwin ,  Joe M. Poss

    IPC分类号： G11B5/39 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/465 ,  G11B19/02 ,  G11B5/09

    CPC分类号： G11B19/02 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B2005/0008 ,  G11B2005/0018 ,  G11B5/465

    摘要： A method and apparatus is disclosed for adaptively controlling the biasing current applied to magnetoresistive (MR) read heads within a magnetic disk drive to provide optimized bias for each head/disk/channel component combination. An optimized bias current for each head is ascertained and stored on the disk surface at the time of manufacture. During each power up operation the values are transferred to random access memory which is accessed during the execution of each head switch command to apply bias current in accordance with the optimized value to the active MR head. Periodic reoptimization and updating of the stored values is effected by general error measurement circuitry that forms a part of the device control system and is invoked to perform the reoptimization upon the occurrence of an event such as a predetermined duration of power on operation subsequent to the last reoptimization procedure.

    摘要翻译： 公开了一种用于自适应地控制施加到磁盘驱动器内的磁阻（MR）读取头的偏置电流的方法和装置，以为每个磁头/磁盘/通道组件组合提供优化的偏置。 在制造时，确定每个头部优化的偏置电流并将其存储在盘表面上。 在每个上电操作期间，这些值被传送到随机存取存储器，随机存取存储器是在执行每个磁头开关命令期间被访问的，以根据优化的值向偏置电流施加偏置电流。 存储值的定期重新优化和更新由构成设备控制系统的一部分的一般误差测量电路实现，并且被调用以在事件发生之后执行重新优化，例如在最后一个之后的预定的上电周期 重新优化程序。

    Self servo writing file
    3.
    发明授权
    Self servo writing file 失效
    自动伺服写入文件

    公开(公告)号：US5570247A

    公开(公告)日：1996-10-29

    申请号：US456973

    申请日：1995-06-01

    申请人： Dana H. Brown ,  Thomas C. Christensen ,  Earl A. Cunningham ,  Wayne A. Rogelstad

    发明人： Dana H. Brown ,  Thomas C. Christensen ,  Earl A. Cunningham ,  Wayne A. Rogelstad

    IPC分类号： G11B5/596 ,  G11B27/32 ,  G11B27/19

    CPC分类号： G11B5/59633 ,  G11B27/322

    摘要： A self servo writing file and method for writing servo patterns in a direct access storage device are provided. First servo information is written on a data storage media at a first crash stop. The transducer heads are moved offset from the written servo information while reading the last written servo information until the detected servo signal equals a predetermined value. Then servo information is written on the data storage media responsive to the detected servo signal equal to the predetermined value. The moving and writing steps are sequentially repeated until a second crash stop is reached. A quad-burst servo amplitude pattern or phase pattern can be used for the servo information. The servo writing method is adapted easily for many different servo options. When the file uses a hybrid servo or sector servo, the other surfaces can be written by duplicating the servo bursts with a high bandwidth servo system of the file. Alternatively, the servo writing steps can be repeated for each of the other surfaces for providing head dependent pitch. Variable track pitch can be provided by selectively varying the predetermined value compared with the detected servo signal.

    摘要翻译： 提供一种用于在直接存取存储装置中写入伺服模式的自伺服写入文件和方法。 第一伺服信息在第一次碰撞停止时被写入数据存储介质。 当读取最后写入的伺服信息直到检测到的伺服信号等于预定值时，传感器头与写入的伺服信息偏移。 然后根据检测到的等于预定值的伺服信号将伺服信息写入数据存储介质上。 顺序重复移动和写入步骤，直到达到第二次碰撞停止。 伺服信息可以使用四脉冲串伺服幅度模式或相位模式。 伺服写入方式适用于许多不同的伺服选项。 当文件使用混合伺服或扇区伺服时，其他​​表面可以通过用文件的高带宽伺服系统复制伺服脉冲串来写入。 或者，可以针对每个其他表面重复伺服写入步骤，以提供与头部相关的音调。 可以通过与检测到的伺服信号相比选择性地改变预定值来提供可变轨道间距。

    Multipath channel apparatus and method for data storage devices and communications systems wherein a data path is selected based on errors
    5.
    发明授权
    Multipath channel apparatus and method for data storage devices and communications systems wherein a data path is selected based on errors 失效
    用于数据存储设备和通信系统的多径通道设备和方法，其中基于错误选择数据路径

    公开(公告)号：US5557482A

    公开(公告)日：1996-09-17

    申请号：US359215

    申请日：1994-12-19

    申请人： Thomas C. Christensen ,  Earl A. Cunningham

    发明人： Thomas C. Christensen ,  Earl A. Cunningham

    IPC分类号： G06F13/00 ,  G11B20/10 ,  G11B20/18 ,  G11B5/09

    CPC分类号： G11B20/10009 ,  G11B20/1833 ,  G11B2020/183

    摘要： A multipath channel apparatus for a data storage device wherein data is stored on a storage medium and is read from the storage medium by a transducer or for a data communications system wherein data is transmitted to a receiver. A data channel having a plurality of data paths is operatively connected to the transducer to receive data read from the storage medium by the transducer, or operatively connected to receive data demodulated by the receiver or base band data received by the receiver. Preferably, each of the data paths has a differing parameter value. An error checking unit checks customer and redundancy data from each of the data paths. A selecting unit, which is responsive to the error checking unit, selects data from one of the data paths. In a preferred embodiment, the data stored on a storage medium includes a data field and an error correcting code field, and the customer and redundancy data from each of the data paths is checked using a calculated error correcting code sydrome.

    摘要翻译： 一种用于数据存储装置的多路径通道装置，其中数据被存储在存储介质上，并且由换能器或数据通信系统从存储介质读取，其中数据被发送到接收器。 具有多个数据路径的数据通道可操作地连接到换能器，以接收由换能器从存储介质读取的数据，或可操作地连接以接收由接收器接收的接收器或基带数据解调的数据。 优选地，每个数据路径具有不同的参数值。 错误检查单元从每个数据路径检查客户和冗余数据。 响应于错误检查单元的选择单元从数据路径之一中选择数据。 在优选实施例中，存储在存储介质上的数据包括数据字段和纠错码字段，并且使用计算出的纠错码信息来检查来自每个数据路径的客户和冗余数据。

    Data recovery procedure using DC offset and gain control for timing loop compensation for partial-response data detection
    6.
    发明授权
    Data recovery procedure using DC offset and gain control for timing loop compensation for partial-response data detection 失效
    使用DC偏移和增益控制的数据恢复程序用于部分响应数据检测的定时环路补偿

    公开(公告)号：US5442492A

    公开(公告)日：1995-08-15

    申请号：US85069

    申请日：1993-06-29

    申请人： Earl A. Cunningham ,  Joe M. Poss

    发明人： Earl A. Cunningham ,  Joe M. Poss

    IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10 ,  G11B20/14 ,  G11B20/18

    CPC分类号： G11B20/10009 ,  G11B20/1419 ,  G11B5/09 ,  G11B2005/0016 ,  G11B5/012

    摘要： Apparatus and method of data recovery are provided for data detection in a partial-response (PR) data channel. The PR data channel includes an analog-to-digital converter (ADC) for providing digital samples of a readback data signal and a voltage controlled oscillator (VCO) timing control coupled to the ADC. A data recovery procedure (DRP) is established responsive to a detected readback error. Using amplitude offset circuitry, amplitude of the readback data signal is selectively adjusted responsive to the detected readback error; and using gain control, a correction current applied to the VCO timing control is changed responsive to the detected readback error.

    摘要翻译： 提供数据恢复的装置和方法用于部分响应（PR）数据信道中的数据检测。 PR数据通道包括用于提供耦合到ADC的回读数据信号和压控振荡器（VCO）定时控制的数字样本的模拟 - 数字转换器（ADC）。 响应于检测到的回读错误建立数据恢复过程（DRP）。 使用幅度偏移电路，响应于检测到的回读误差来选择性地调节回读数据信号的幅度; 并且使用增益控制，响应于检测到的回读误差改变施加到VCO定时控制的校正电流。

    Transducer head for rigid disk drive
    7.
    发明授权
    Transducer head for rigid disk drive 失效
    硬盘驱动器用传感器头

    公开(公告)号：US5245487A

    公开(公告)日：1993-09-14

    申请号：US784067

    申请日：1991-10-30

    申请人： Earl A. Cunningham

    发明人： Earl A. Cunningham

    IPC分类号： G11B5/55 ,  G11B5/596

    CPC分类号： G11B5/596 ,  G11B5/5526

    摘要： A dedicated servo transducer head for phase skewed position information signals in servo information tracks of a rigid magnetic disk drive unit has a width spanning up to eight servo information tracks in order to overcome problems in gain irregularity caused by abrupt phase jumps between tracks. An embodiment of the invention includes a track reading surface that varies in sensitivity across the width of the head to avoid gain loss during incremental radial movement with head edges overlying track edge fringes.

    摘要翻译： 用于刚性磁盘驱动单元的伺服信息轨道中的相位偏移位置信息信号的专用伺服传感器头具有跨越多达八个伺服信息轨迹的宽度，以克服由轨迹之间的突然相位跳跃引起的增益不均匀性的问题。 本发明的实施例包括轨迹读取表面，其在头部宽度上的灵敏度变化，以避免增量径向运动期间的增益损失，头部边缘覆盖轨迹边缘条纹。

    Differentially sensitive single track read/write head design with improved biasing
    10.
    发明授权
    Differentially sensitive single track read/write head design with improved biasing 失效
    差分敏感的单轨读/写头设计具有改进的偏置

    公开(公告)号：US4860138A

    公开(公告)日：1989-08-22

    申请号：US119501

    申请日：1987-11-12

    申请人： Albert W. Vinal ,  Earl A. Cunningham

    发明人： Albert W. Vinal ,  Earl A. Cunningham

    IPC分类号： G11B5/127 ,  G11B5/39

    CPC分类号： G11B5/3964 ,  G11B5/1278 ,  G11B5/3903 ,  G11B5/3967

    摘要： A simplified structure for a single track read/write head design is disclosed. The design incorporates a simplified write coil structure and an improved and simplified combined magnetic bias and sensor current structure. The active sensing current is utilized both to create an anti-parallel magnetic vector couple in a coupled film magneto resistive sensor and to magnetically bias or torque the anti-parallel couple so that magnetization within the sensor films lies at an angle with the easy magnetic axis. Sensor current is fed in series through an electro-magnetic coil wrapped about the magneto resistive sensor so that sense current simultaneously creates an anti-parallel magnetic vector couple in the sensor and generates an electromagnetic bias field to torque the anti-parallel couple at an angle with the easy axis of magnetization. An improved spirally laid-out planar deposited writing flux coil is positioned about the writing electromagnetic core which greatly simplifies fabrication steps in making the device.