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    ZONE SELF SERVO WRITING WITH SYNCHRONIZED PARALLEL CLOCKS
    1.
    发明公开
    ZONE SELF SERVO WRITING WITH SYNCHRONIZED PARALLEL CLOCKS 审中-公开

    公开(公告)号：EP3671744A1

    公开(公告)日：2020-06-24

    申请号：EP19217455.5

    申请日：2019-12-18

    申请人： Marvell World Trade Ltd.

    发明人： KATCHMART, Supaket

    IPC分类号： G11B5/596 ,  G11B20/10

    摘要： Zone self-servo write (SSW) technology is disclosed that leverages two clock signals synchronized in parallel to transition between zones to write servo patterns at different frequencies while minimizing error rate despite the different frequencies. Two separate clock signals ("clocks") are used to locate and lock to different reference spirals. By updating both clocks in parallel instead of in series, error rate for writing while stepping up frequency across zones is reduced.

    Motor drive circuit
    6.
    发明公开
    Motor drive circuit 审中-公开
    电机驱动电路

    公开(公告)号：EP2434487A1

    公开(公告)日：2012-03-28

    申请号：EP11182564.2

    申请日：2011-09-23

    申请人： ON Semiconductor Trading Ltd.

    发明人： Arai, Takeshi

    IPC分类号： G11B5/55 ,  G11B21/10 ,  G11B5/596 ,  G11B21/08 ,  G05B11/36 ,  G02B7/04 ,  G05D13/62

    CPC分类号： G11B5/5526 ,  G02B7/102 ,  G11B5/59622 ,  G11B21/083 ,  G11B21/106 ,  H02P25/034

    摘要： A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, which is a digital signal indicating a target value of a driving current to be supplied to a voice-coil motor that drives the actuator; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the motor in accordance with the current-control signal, the filter circuit including: a digital-notch filter to attenuate a frequency band around the resonance frequency in the target-current signal; and a digital-low-pass filter to attenuate a frequency band greater than or equal to a predetermined frequency in the output signal of the digital-notch filter, the digital-low-pass filter having a sampling frequency higher than a sampling frequency of the digital-notch filter.

    摘要翻译： 一种电动机驱动电路包括：滤波器电路，用于衰减包括目标电流信号中的致动器的谐振频率的频带，该目标电流信号是指示要提供给音圈的驱动电流的目标值的数字信号 驱动执行器的电机; 数字模拟转换器，将滤波器电路的输出信号转换为模拟信号，作为电流控制信号输出; 以及驱动电路，根据所述电流控制信号向所述电动机提供所述驱动电流，所述滤波器电路包括：数字陷波滤波器，用于衰减所述目标电流信号中的谐振频率附近的频带; 以及数字低通滤波器，用于衰减数字陷波滤波器的输出信号中的大于或等于预定频率的频带，所述数字低通滤波器的采样频率高于所述数字陷波滤波器的采样频率 数字陷波滤波器。

    Systems and methods for efficient data storage
    8.
    发明公开
    Systems and methods for efficient data storage 审中-公开
    Systeme und Verfahren zur wirksamen Speicherung von Daten

    公开(公告)号：EP2372713A1

    公开(公告)日：2011-10-05

    申请号：EP10170182.9

    申请日：2010-07-20

    申请人： LSI Corporation

    发明人： Jin, Ming ,  Yang, Shaohua

    IPC分类号： G11B20/12 ,  G11B5/596

    CPC分类号： G11B20/1217 ,  G11B5/59655 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1284 ,  G11B2020/1289 ,  G11B2020/1292 ,  G11B2020/185 ,  G11B2220/2516

    摘要： Various embodiments of the present invention provide systems and methods for preparing and accessing super sector data sets. As an example, a data storage system including a storage medium is disclosed. The storage medium includes a first servo data region and a second servo data region separated by a user data region. The user data region includes at least a portion of a first codeword and a portion of a second codeword that are together associated with a common header data.

    摘要翻译： 本发明的各种实施例提供了用于准备和访问超扇区数据集的系统和方法。 作为示例，公开了包括存储介质的数据存储系统。 存储介质包括第一伺服数据区和由用户数据区隔开的第二伺服数据区。 用户数据区域包括与公共报头数据相关联的第一码字和第二码字的一部分的至少一部分。

    Control device for the change of the driving modality of an electromagnetic load
    9.
    发明公开
    Control device for the change of the driving modality of an electromagnetic load 有权
    Steuervorrichtung zum Wechseln derAntriebsmodalitäteiner elektromagnetischen Last

    公开(公告)号：EP2237405A1

    公开(公告)日：2010-10-06

    申请号：EP10158288.0

    申请日：2010-03-30

    申请人： STMicroelectronics S.r.l.

    发明人： Galbiati, Ezio ,  Peritore, Roberto ,  Bartolini, Michele ,  Mirabelli, Agostino

    IPC分类号： H02P6/08 ,  H02P6/22 ,  G11B5/55 ,  G11B5/596 ,  H02P25/02

    CPC分类号： H02P6/08 ,  G11B5/022 ,  G11B5/5547 ,  H02P6/085 ,  H02P6/22 ,  H02P25/034

    摘要： There is described a control device for the change of the driving modality of an electromagnetic load (3); the electromagnetic load is passed through by a current (Ivcm). The device has at the input a control signal (L/P) to change the operation modality of an electromagnetic load (3) from a first operation modality (PWM) to a second operation modality (LIN) or vice versa and a signal (Tri_Peak, Tri_Mid) representative of the passage of current (Icvm) that passes through the load (3) for substantially its average value (IM). The device comprises first means (100, 201) adapted to synchronize the driving signal (L/P) for changing the first operation modality to the second operation modality or vice versa of the electromagnetic load with the signal (Tri_Peak, Tri_Mid) of the passage of current (Ivcm) passing through the load (3) for substantially its average value, and to generate a driving signal (S1p) as a function of said synchronization. ( Fig. 6 )

    摘要翻译： 描述了用于改变电磁负载（3）的驱动模态的控制装置; 电流负载通过电流（Ivcm）。 该设备在输入端具有控制信号（L / P），以将电磁负载（3）的操作模式从第一操作模式（PWM）改变为第二操作模态（LIN）或反之亦然，信号（Tri_Peak ，Tri_Mid）代表通过负载（3）基本上其平均值（IM）的电流（Icvm）的通过。 所述装置包括适于使所述第一操作模态的驱动信号（L / P）与所述电磁负载的第二操作模态（或反之亦然）同步的通道的信号（Tri_Peak，Tri_Mid）的第一装置（100,201） 通过负载（3）的电流（Ivcm）基本上为其平均值，并且产生作为所述同步的函数的驱动信号（S1p）。 （图6）