System and method for low acoustic noise spindle motor commutation
    1.
    发明授权
    System and method for low acoustic noise spindle motor commutation 失效
    低噪声主轴电动机换向系统及方法

    公开(公告)号:US06215266B1

    公开(公告)日:2001-04-10

    申请号:US09100761

    申请日:1998-06-17

    IPC分类号: H02P620

    摘要: A system for low acoustic noise spindle motor commutation is disclosed. The system contains a control device that generates commutation control signals which cause spindle motor drivers to source or sink current through windings of a spindle motor. The windings create electromagnetic fields which induce rotational movement in a spindle motor rotor. Low acoustic noise snubber devices are coupled to each winding and are dynamically configurable by the control device to provide low spindle motor driver charging current upon initial application of power to the spindle motor, and reduced acoustic noise and back EMF-generated current and voltage surges at the spindle motor driver during spindle motor commutation.

    摘要翻译: 公开了一种用于低声噪声主轴电动机换向的系统。 该系统包含一个产生换向控制信号的控制装置,使得主轴电动机驱动器通过主轴电动机的绕组来产生或吸收电流。 绕组产生在主轴电机转子中引起旋转运动的电磁场。 低噪声缓冲装置耦合到每个绕组,并且可由控制装置动态地配置,以在初始向主轴电机施加电力时提供低主轴电动机驱动器充电电流,并且减少了噪声和反电动势产生的电流和电压浪涌 主轴电机换向时的主轴电机驱动器。

    Method and apparatus for correcting digital asymmetric read signals
    2.
    发明授权
    Method and apparatus for correcting digital asymmetric read signals 失效
    用于校正数字非对称读信号的方法和装置

    公开(公告)号:US06519106B1

    公开(公告)日:2003-02-11

    申请号:US09553073

    申请日:2000-04-20

    IPC分类号: G11B535

    摘要: A method for compensating digital samples of an asymmetric read signal is presented. The method involves reading a digital sample of an asymmetric read signal V(t) (160), generating a compensated sample at least when the digital sample requires compensation (164), and outputting either the digital sample (168) or the compensated sample (166). Also presented is an asymmetry correction block (158) of a read channel (144) of a disc drive (110) that includes an input (200), a level detector (202), a compensator (204), and an output (208). The level detector (202) and the compensator (204) receive the digital sample through the input (200). The level detector (202) determines whether the digital sample requires compensation. The compensator (204) generates a compensated sample at least when the digital sample requires compensation. The output (208) selectively outputs either the digital sample or the compensated sample.

    摘要翻译: 提出了一种用于补偿非对称读信号的数字样本的方法。 该方法涉及读取非对称读取信号V(t)(160)的数字样本,至少当数字样本需要补偿时产生补偿样本(164),并输出数字样本(168)或补偿样本 166)。 还提出了包括输入(200),电平检测器(202),补偿器(204)和输出(208)的盘驱动器(110)的读通道(144)的不对称校正块(158) )。 电平检测器(202)和补偿器(204)通过输入(200)接收数字采样。 电平检测器(202)确定数字样本是否需要补偿。 至少当数字样本需要补偿时,补偿器(204)产生补偿样本。 输出(208)选择性地输出数字样本或补偿样本。

    Intelligent speed monitoring auto retract system
    3.
    发明授权
    Intelligent speed monitoring auto retract system 失效
    智能速度监控系统

    公开(公告)号:US06636374B1

    公开(公告)日:2003-10-21

    申请号:US09556887

    申请日:2000-04-19

    IPC分类号: G11B2102

    CPC分类号: G11B5/54 G11B19/20 G11B21/12

    摘要: A system for hardware intelligent speed monitoring and auto-retract is disclosed. The system contains a monitoring device that monitors the TACH (Tachometer) output of motor driver. The device provides a trigger to the signal processor and a retract mechanism to retract the actuator when the spindle motor speed is unexpectedly much higher or lower than normal speed. The system DSP (Digital Signal Processor) is unaware of such occurrence.

    摘要翻译: 公开了一种用于硬件智能速度监测和自动缩回的系统。 该系统包含监控电机驱动器的TACH(转速表)输出的监控装置。 当主轴电机速度意外地高于或低于正常速度时,该装置向信号处理器提供触发器和一个缩回机构以使致动器缩回。 系统DSP(数字信号处理器)不知道这种情况。