公开(公告)号：US09633688B2

公开(公告)日：2017-04-25

申请号：US14902941

申请日：2014-04-08

申请人： Sharp Kabushiki Kaisha ,  Memory-Tech Holdings Inc.

发明人： Hideharu Tajima ,  Masaki Yamamoto ,  Hirohisa Yamada ,  Takayuki Naka ,  Masahito Konishi

IPC分类号： G11B7/00 ,  G11B7/135 ,  G11B20/10 ,  G11B7/1392 ,  G11B7/013 ,  G11B7/005

CPC分类号： G11B20/10314 ,  G11B7/0052 ,  G11B7/0053 ,  G11B7/013 ,  G11B7/13 ,  G11B7/1374 ,  G11B7/13927 ,  G11B2007/0133

摘要： A reproducing device (100) includes (i) an optical pickup (6) for irradiating, with reproduction light, an optical disk (1) which is a super-resolution medium, (ii) an RF signal processing circuit (9) for converting, into a reproduction signal, light which reflected off optical disk (1), (iii) an i-MLSE detecting section (141) for evaluating quality of the reproduction signal, and (iv) a spherical aberration correcting section (142) for correcting a spherical aberration by using a result of evaluation of the quality of the reproduction signal.

公开(公告)号：US09093122B1

公开(公告)日：2015-07-28

申请号：US13925734

申请日：2013-06-24

申请人： WD Media, LLC.

发明人： Dragos I. Mircea ,  Steven E. Lambert ,  Andreas Moser ,  Harold H. Gee ,  Douglas N. Bartholomew

IPC分类号： G11B27/36 ,  G11B5/012 ,  G11B20/10

CPC分类号： G11B27/36 ,  G11B5/012 ,  G11B5/455 ,  G11B20/10305 ,  G11B20/10314 ,  G11B2220/2516

摘要： Systems and methods for improving the accuracy of test measurements involving aggressor tracks written to the disks are provided. One such method involves erasing a circumferential band of a disk, writing a central track on the circumferential band, measuring and storing a first track profile of the central track, writing an aggressor track on each side of the central track at a preselected aggressor track offset from the central track, measuring and storing a track profile of the aggressor tracks at the preselected aggressor track offset, measuring and storing a second track profile of the central track, performing the prior actions exactly n times where n is greater than or equal to 1, determining an estimated distance between the aggressor tracks based on the respective track profiles, determining a selected measurement using the estimated distance between the aggressor tracks, and the first and second track profiles of the central track.

摘要翻译： 提供了用于提高涉及写入磁盘的侵入轨迹的测试测量精度的系统和方法。 一种这样的方法包括擦除盘的周向带，在圆周带上写入中心轨道，测量和存储中心轨道的第一轨道轮廓，在预选的侵略者轨道偏移处写入中心轨道的每一侧上的侵略轨道 测量和存储在预选的侵略者轨道偏移处的侵略者轨道的轨道轮廓，测量和存储中心轨迹的第二轨道轮廓，执行n次大于或等于1的n次的先前动作 基于相应的轨道轮廓来确定攻击者轨道之间的估计距离，使用侵略者轨道之间的估计距离以及中心轨道的第一和第二轨道轮廓确定所选择的测量。

公开(公告)号：US08593913B2

公开(公告)日：2013-11-26

申请号：US13284293

申请日：2011-10-28

申请人： Yuichi Yamada ,  Akihiko Takeo ,  Hiroshi Isokawa

发明人： Yuichi Yamada ,  Akihiko Takeo ,  Hiroshi Isokawa

IPC分类号： G11B11/00

CPC分类号： G11B5/02 ,  G11B5/455 ,  G11B20/10314 ,  G11B20/10509 ,  G11B20/1879 ,  G11B2005/001 ,  G11B2005/0021 ,  G11B2220/2516

摘要： According to one embodiment, a magnetic recording device includes: a magnetic recording medium provided with data regions for data recording; a light output module which outputs an optical signal to be applied to a recording position where recording data is recorded of the data regions; a write head which records the recoding data at the recording position magnetically; a light quantity setting module which sets a light quantity value of the optical signal output from the light output module; a heat-assisted recording controller which performs a control so that the recording data is recorded by the write head at the recording position which is heat-assisted by applying an optical signal with the set light quantity value; and a controller which adjusts the light quantity value of the optical signal set by the light quantity setting module using the recording position being a part of the data regions.

摘要翻译： 根据一个实施例，磁记录装置包括：磁记录介质，设置有用于数据记录的数据区; 光输出模块，其输出要施加到记录数据的数据区域的记录位置的光信号; 写入头，其在记录位置上磁记录记录数据; 光量设定模块，其设定从所述光输出模块输出的光信号的光量值; 一种热辅助记录控制器，其执行控制，使得记录数据由写入头记录在通过施加具有设定光量值的光信号而被热辅助的记录位置处; 以及控制器，其使用作为数据区域的一部分的记录位置来调整由光量设定模块设置的光信号的光量值。

公开(公告)号：US08514506B1

公开(公告)日：2013-08-20

申请号：US13371252

申请日：2012-02-10

申请人： Shaoping Li ,  Yimin Guo ,  Francis H. Liu ,  Sining Mao

发明人： Shaoping Li ,  Yimin Guo ,  Francis H. Liu ,  Sining Mao

IPC分类号： G11B5/09 ,  G11B20/10

CPC分类号： G11B5/3954 ,  G11B5/012 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10074 ,  G11B20/10175 ,  G11B20/10222 ,  G11B20/10231 ,  G11B20/10277 ,  G11B20/10305 ,  G11B20/10314 ,  G11B20/10379 ,  G11B20/1258 ,  G11B2220/2516

摘要： A disk drive is disclosed comprising a disk having a plurality of data tracks, and a head actuated over the disk, the head comprising a first read element and a second read element. A data track is read to generate a first read signal emanating from the first read element and a second read signal emanating from the second read element. The first read signal is delayed in continuous time relative to the second read signal to generate a delayed read signal, and the second read signal is combined with the delayed read signal to generate a combined read signal. An estimated data sequence is detected from the combined read signal.

摘要翻译： 公开了一种磁盘驱动器，其包括具有多个数据磁道的磁盘，以及在盘上驱动的磁头，磁头包括第一读取元件和第二读取元件。 读取数据磁道以产生从第一读取元件发出的第一读取信号和从第二读取元件发出的第二读取信号。 第一读取信号相对于第二读取信号以连续时间延迟，以产生延迟的读取信号，并且将第二读取信号与延迟的读取信号组合以产生组合的读取信号。 从组合的读取信号中检测估计的数据序列。

公开(公告)号：US08457926B2

公开(公告)日：2013-06-04

申请号：US12841599

申请日：2010-07-22

申请人： Kenichi Shitara ,  Yasuhiro Tokumaru

发明人： Kenichi Shitara ,  Yasuhiro Tokumaru

IPC分类号： G01B5/20 ,  G01B21/20 ,  G06F19/00 ,  G06F17/40

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10314 ,  G11B2220/2516

摘要： The present invention relates to a disk protrusion detection/flatness measurement circuit and a disk glide tester, in which protrusion detection and average value calculation can be performed without switching signal processing circuits of two systems, one for the protrusion detection of a disk and the other for the average value calculation with respect to a track or a sector of the disk. This also makes it possible to reduce the size of the measurement circuit. In the protrusion detection/flatness measurement circuit, a signal from a protrusion detection sensor is amplified and converted from an analog signal to a digital signal. The signal passes through a band-pass filter to obtain a digital signal with a predetermined bandwidth. Then, peak detection and average value calculation processes are applied in parallel to the obtained digital signal. Thus, pass/fail decision of the disk can be made based on the detected peak and average values.

摘要翻译： 盘突起检测/平坦度测量电路和盘滑动测试仪技术领域本发明涉及一种能够在不切换两个系统的信号处理电路的情况下执行突起检测和平均值计算的盘突起检测/平坦度测量电路和盘滑动测试仪，一个用于盘的突出检测和另一个 用于相对于盘的轨道或扇区的平均值计算。 这也可以减小测量电路的尺寸。 在突起检测/平坦度测量电路中，来自突起检测传感器的信号被放大并从模拟信号转换成数字信号。 信号通过带通滤波器以获得具有预定带宽的数字信号。 然后，与所获得的数字信号并行地应用峰值检测和平均值计算处理。 因此，可以基于检测到的峰值和平均值来进行盘的通过/失败判定。

公开(公告)号：US20110051580A1

公开(公告)日：2011-03-03

申请号：US12841599

申请日：2010-07-22

申请人： Kenichi SHITARA ,  Yasuhiro TOKUMARU

发明人： Kenichi SHITARA ,  Yasuhiro TOKUMARU

IPC分类号： G11B20/18

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10314 ,  G11B2220/2516

摘要： The present invention relates to a disk protrusion detection/flatness measurement circuit and a disk glide tester, in which protrusion detection and average value calculation can be performed without switching signal processing circuits of two systems, one for the protrusion detection of a disk and the other for the average value calculation with respect to a track or a sector of the disk. This also makes it possible to reduce the size of the measurement circuit. In the protrusion detection/flatness measurement circuit, a signal from a protrusion detection sensor is amplified and converted from an analog signal to a digital signal. The signal passes through a band-pass filter to obtain a digital signal with a predetermined bandwidth. Then, peak detection and average value calculation processes are applied in parallel to the obtained digital signal. Thus, pass/fail decision of the disk can be made based on the detected peak and average values.

摘要翻译： 盘突起检测/平坦度测量电路和盘滑动测试仪技术领域本发明涉及一种能够在不切换两个系统的信号处理电路的情况下执行突起检测和平均值计算的盘突起检测/平坦度测量电路和盘滑动测试仪，一个用于盘的突出检测和另一个 用于相对于盘的轨道或扇区的平均值计算。 这也可以减小测量电路的尺寸。 在突起检测/平坦度测量电路中，来自突起检测传感器的信号被放大并从模拟信号转换成数字信号。 信号通过带通滤波器以获得具有预定带宽的数字信号。 然后，与所获得的数字信号并行地应用峰值检测和平均值计算处理。 因此，可以基于检测到的峰值和平均值来进行盘的通过/失败判定。

公开(公告)号：US07729071B2

公开(公告)日：2010-06-01

申请号：US11896211

申请日：2007-08-30

申请人： Kohsuke Harada

发明人： Kohsuke Harada

IPC分类号： G11B5/09

CPC分类号： H03M13/3905 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/1012 ,  G11B20/10296 ,  G11B20/10314 ,  G11B20/10481 ,  G11B20/1833 ,  G11B2220/2516 ,  H03M13/1102 ,  H03M13/2957 ,  H03M13/41 ,  H03M13/4146 ,  H03M13/6331

摘要： A readback apparatus (a) calculates a variance value of a signal read by a head from a disc medium, (b) estimates a degree of offtracking of the head from a target track to an adjacent track, and interference power from the adjacent track using the variance value of the signal, (c) calculates a soft decision likelihood value for the signal using the degree of offtracking and the interference power, and (d) performs error correcting decoding using the soft decision likelihood value.

摘要翻译： 回读装置（a）计算由盘介质读取的信号的方差值，（b）估计头部从目标轨道到相邻轨道的后掠程度，以及来自相邻轨道的干扰功率，使用 信号的方差值，（c）使用跟踪程度和干扰功率计算信号的软判决似然值，（d）使用软判决似然值进行纠错解码。

公开(公告)号：US20070290756A1

公开(公告)日：2007-12-20

申请号：US11757421

申请日：2007-06-04

申请人： Yu-Hsuan Lin ,  Yuh Cheng

发明人： Yu-Hsuan Lin ,  Yuh Cheng

IPC分类号： H03G3/00

CPC分类号： H03G3/3036 ,  G11B20/10009 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10314 ,  G11B27/22

摘要： An electrical device and a loop control method are provided. A data signal is obtained from a front end. A variable gain amplifier amplifies the data signal based on a gain value. An analog to digital converter samples the amplified data signal output therefrom to generate a digital data signal. A peak bottom detector detects a peak level and a bottom level of the digital data signal. A threshold controller compares the peak and bottom levels with a threshold value, and generates a first control signal accordingly. An auto gain controller updates the gain value based on the peak and bottom levels with a first step size. The first step size is determined by the first control signal.

摘要翻译： 提供电气装置和环路控制方法。 从前端获得数据信号。 可变增益放大器基于增益值放大数据信号。 模数转换器对从其输出的放大数据信号进行采样以产生数字数据信号。 峰值检测器检测数字数据信号的峰值电平和底部电平。 阈值控制器将峰值和底部电平与阈值进行比较，并相应地产生第一控制信号。 自动增益控制器根据具有第一步长的峰值和最低电平来更新增益值。 第一步尺寸由第一控制信号确定。

公开(公告)号：US07301871B2

公开(公告)日：2007-11-27

申请号：US10791532

申请日：2004-03-03

申请人： Yi-Lin Lai ,  Yi-Chung Chan

发明人： Yi-Lin Lai ,  Yi-Chung Chan

IPC分类号： G11B27/36

CPC分类号： G11B20/1816 ,  G11B20/1024 ,  G11B20/10314 ,  G11B20/10388 ,  G11B20/14 ,  G11B27/10 ,  G11B2020/1823 ,  G11B2220/2537

摘要： The device includes a servo control unit, a data path control unit, a defect detection unit, and a logic combination unit. The data path control unit further includes a preamplifier receiving data from a lens and generating RF signals for data process. The defect detection unit receives the various signals for detecting different kinds of defects to set corresponding defect flag signals. The defect detection unit includes means for ADefect1 detection, means for EFMDefect detection, means for RPDefect detection, means for Interruption detection, means for ADefect detection, and means for DSPDefect detection.

摘要翻译： 该装置包括伺服控制单元，数据路径控制单元，缺陷检测单元和逻辑组合单元。 数据路径控制单元还包括从镜头接收数据并产生用于数据处理的RF信号的前置放大器。 缺陷检测单元接收用于检测不同种类的缺陷的各种信号，以设置相应的缺陷标志信号。 缺陷检测单元包括用于ADEULT 1检测的装置，用于EFMDefect检测的装置，用于RPDefect检测的装置，用于中断检测的装置，用于AD检测的装置，以及用于DSPDefect检测的装置。

公开(公告)号：US20050157626A1

公开(公告)日：2005-07-21

申请号：US10906541

申请日：2005-02-24

申请人： Jyh-Fong Lin ,  Yi-Bin Hsieh ,  Chih-Chang Chien

发明人： Jyh-Fong Lin ,  Yi-Bin Hsieh ,  Chih-Chang Chien

IPC分类号： G11B3/00 ,  G11B5/09 ,  G11B20/10

CPC分类号： G11B20/10027 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10314

摘要： A signal processing circuit for adjusting an input signal and generating a corresponding digital output signal in an optical disk driver is provided. The signal processing circuit includes an attenuator for receiving and attenuating the input signal and then generating an attenuated output signal; a gain controllable amplifier for receiving and amplifying the input signal and then generating an amplified output signal; a control unit providing a control signal and a select signal, the control signal is directed to the attenuator and the gain controllable amplifier for enabling/disabling the attenuator and the gain controllable amplifier and for controlling their gains such that one of the attenuator and gain controllable amplifier is enabled at a time; and a waveform adjuster circuit for adjusting the amplified/attenuated output signal delivered from the gain controllable amplifier or the attenuator so as to generate the digital signal related to the input signal.

摘要翻译： 提供了一种用于在光盘驱动器中调整输入信号并产生相应的数字输出信号的信号处理电路。 信号处理电路包括：衰减器，用于接收和衰减输入信号，然后产生衰减的输出信号; 增益可控放大器，用于接收和放大输入信号，然后产生放大的输出信号; 提供控制信号和选择信号的控制单元，控制信号被引导到衰减器和增益可控放大器，用于使能/禁用衰减器和增益可控放大器并用于控制其增益，使得衰减器和增益中的一个可控 放大器一次启用; 以及用于调整从增益可控放大器或衰减器传送的放大/衰减的输出信号的波形调节器电路，以产生与输入信号有关的数字信号。