Calibrating write pre-equalization in a data storage device
    1.
    发明授权
    Calibrating write pre-equalization in a data storage device 有权
    在数据存储设备中校准写预均衡

    公开(公告)号:US06256158B1

    公开(公告)日:2001-07-03

    申请号:US09311481

    申请日:1999-05-12

    IPC分类号: G11B2736

    CPC分类号: G11B20/10194 G11B5/09

    摘要: A method is described of calibrating a write pre-equalization circuit in the write channel of a magnetic data storage device which maximizes the rate at which the write channel can write to a data storage medium. The method includes the steps of: setting an amplitude of a delayed current to a minimum value ; setting a delay period of the delayed current to a minimum value; setting an amplitude of a main driver current to a minimum value; recording a low frequency test signal to the data storage medium; reading the low frequency test signal from the data storage medium; monitoring a quality metric of the low frequency test signal; varying the amplitude of the main driver current over a range of amplitudes; selecting an optimum amplitude of the main driver current; setting the delay period of the delayed signal to a predetermined value; recording a pseudo-random test signal to the data storage medium; reading the pseudo-random test signal from the data storage medium; monitoring a quality metric of the read pseudo-random test signal; varying the amplitude of the delayed current over a range of amplitudes; and selecting an optimum value of the delayed current, depending on the monitored quality metric.

    摘要翻译: 描述了一种校准磁数据存储装置的写通道中的写预均衡电路的方法,其使写信道能够写入数据存储介质的速率最大化。 该方法包括以下步骤:将延迟电流的振幅设定为最小值; 将延迟电流的延迟时间设定为最小值; 将主驱动器电流的幅度设定为最小值; 将低频测试信号记录到数据存储介质; 从数据存储介质读取低频测试信号; 监测低频测试信号的质量度量; 改变主驱动器电流在幅度范围上的幅度; 选择主驱动器电流的最佳幅度; 将延迟信号的延迟周期设定为预定值; 将伪随机测试信号记录到数据存储介质; 从数据存储介质读取伪随机测试信号; 监测读取的伪随机测试信号的质量度量; 在一定幅度范围内改变延迟电流的振幅; 并根据所监测的质量度量来选择延迟电流的最佳值。

    Double pulse write driver
    2.
    发明授权
    Double pulse write driver 有权
    双脉冲写驱动

    公开(公告)号:US06307692B1

    公开(公告)日:2001-10-23

    申请号:US09313453

    申请日:1999-05-18

    IPC分类号: G11B509

    CPC分类号: G11B20/10194 G11B5/09

    摘要: A device is described for increasing the rate at which data may be written to a magnetic data storage medium. The device includes circuitry for amplifying the data and circuitry for writing the data to a data storage medium. The circuitry for amplifying the data includes: circuits for amplifying the data; delaying and amplifying the data; and adding the amplified data and the delayed and amplified data.

    摘要翻译: 描述了一种用于增加可将数据写入磁数据存储介质的速率的装置。 该装置包括用于放大数据的电路和用于将数据写入数据存储介质的电路。 用于放大数据的电路包括:放大数据的电路; 延迟和放大数据; 并添加放大数据和延迟和放大的数据。