公开(公告)号：US20130148224A1

公开(公告)日：2013-06-13

申请号：US13316419

申请日：2011-12-09

申请人： Patrick Mesquita Braganca ,  Richard Leo Galbraith ,  Bruce Alvin Gurney ,  Neil Smith ,  Bruce Wilson ,  Rehan Ahmed Zakai

发明人： Patrick Mesquita Braganca ,  Richard Leo Galbraith ,  Bruce Alvin Gurney ,  Neil Smith ,  Bruce Wilson ,  Rehan Ahmed Zakai

IPC分类号： G11B20/06

CPC分类号： H03D3/009 ,  G11B20/10018 ,  G11B20/10027 ,  G11B2220/2516

摘要： A method, apparatus, and system are provided for implementing spin-torque oscillator sensing with an enhanced integrated demodulator for hard disk drives. The demodulator receives an input signal from a STO read sensor having an oscillation frequency ω related to the strength of the detected magnetic signal field. The demodulator includes a pair of mixers coupled to a quadrature reference oscillator with respective quadrature components cos(ω0t), and sin(ω0t) of the quadrature reference oscillator being mixed with a received input signal to form signals at the sum and difference frequencies, ω±ω0. Each of these mixer products is lowpass filtered by a respective a lowpass filter to remove the sum frequency components for providing a demodulator output signal that is directly proportional the STO oscillation frequency ω. The demodulator output signal is used for processing by data detection electronics.

摘要翻译： 提供了一种用于通过用于硬盘驱动器的增强型集成解调器来实现自旋扭矩振荡器感测的方法，装置和系统。 解调器接收来自具有与所检测的磁信号场的强度相关的振荡频率ω的STO读取传感器的输入信号。 解调器包括耦合到具有相应正交分量cos（ωωt）的正交参考振荡器的正交参考振荡器对，并且正交基准振荡器的sin（ω0t）与接收的输入信号混合以形成和频率和差频率ω ±omega0。 这些混频器产品中的每一个由相应的低通滤波器进行低通滤波，以去除和频分量，以提供与STO振荡频率ω直接成比例的解调器输出信号。 解调器输出信号用于数据检测电子设备的处理。

公开(公告)号：US20110157736A1

公开(公告)日：2011-06-30

申请号：US12651259

申请日：2009-12-31

申请人： John CONTRERAS ,  Bernhard E. Knigge

发明人： John CONTRERAS ,  Bernhard E. Knigge

IPC分类号： G11B27/36 ,  G11B20/06

CPC分类号： G11B5/6011 ,  G11B5/6023 ,  G11B5/607 ,  G11B5/6076

摘要： A hard disk drive (HDD) including a slider. The slider includes a resistive temperature detector (RTD) configured to detect a temperature generated by one or more of slider spacing and contact with a media of said HDD. HDD also includes a slider signal controller configured to control bias signal of a slider with respect to a media potential, a real-time media-disk fly-height and contact detector configured to detect one or more of temperature generated by real-time media-disk slider spacing and real-time media-disk contact, and a real-time relative fly-height determiner configured to detect real-time relative fly-height of the slider based on analysis of a modulated portion of a high-frequency signal coupled to an element of the slider.

摘要翻译： 包括滑块的硬盘驱动器（HDD）。 滑块包括电阻温度检测器（RTD），其被配置为检测由滑块间隔中的一个或多个产生的温度并与所述HDD的介质接触。 HDD还包括滑块信号控制器，其被配置为控制滑块相对于媒体电位的偏置信号，实时媒体盘飞行高度和接触检测器，被配置为检测由实时媒体产生的温度中的一个或多个温度， 磁盘滑块间隔和实时媒体磁盘接触，以及实时相对飞行高度确定器，其被配置为基于耦合到高频信号的高频信号的调制部分的分析来检测滑块的实时相对飞行高度 滑块的元素。

公开(公告)号：US07907359B2

公开(公告)日：2011-03-15

申请号：US12345561

申请日：2008-12-29

申请人： William G. Bliss ,  Razmik Karabed

发明人： William G. Bliss ,  Razmik Karabed

IPC分类号： G11B5/02 ,  G11B20/06 ,  G11B20/08 ,  G11B5/09 ,  G11B15/52 ,  G11B19/02 ,  G11B20/00

CPC分类号： G11B20/10194 ,  G11B20/10009 ,  G11B20/1426 ,  G11B20/1833 ,  G11B2220/2516

摘要： The invention relates to a data modulation method applicable to make data streams tend to have desired properties, useful for clock recovery, making signals more distinguishable, or enforcing run-length conditions. A stream of input data and a corresponding stream of output data are grouped into elements of a finite field. Input elements of said input data are modified by a transform generating output elements of the output data, such that a current output element is a linear combination of a current input element and at least one previous output element. A multiplier applied to at least one previous output element is a non-zero and non-unity element of the finite field. A set of initial conditions inherent to the transform, is selected such that the output elements resulting from the transform tend to have the desired property.

摘要翻译： 本发明涉及一种适用于使数据流倾向于具有期望属性的数据调制方法，对于时钟恢复有用，使得信号更可区分，或者执行运行长度条件。 输入数据流和相应的输出数据流被分组成有限域的元素。 通过产生输出数据的输出元件的变换来修改所述输入数据的输入元件，使得当前输出元件是当前输入元件和至少一个先前输出元件的线性组合。 应用于至少一个先前输出元素的乘数是有限域的非零和非单位元素。 选择变换固有的一组初始条件，使得由变换产生的输出元素倾向于具有期望的属性。

公开(公告)号：US07881821B2

公开(公告)日：2011-02-01

申请号：US11850444

申请日：2007-09-05

申请人： Atul K. Kampani ,  Pranav A. Kampani

发明人： Atul K. Kampani ,  Pranav A. Kampani

IPC分类号： G06F17/00 ,  G06F7/00 ,  G11B15/18 ,  G11B17/00 ,  G11B19/02 ,  G11B20/06

CPC分类号： G11B17/225

摘要： A media storage system includes a disc input element for receiving a media disc, a disc output element for ejecting a disc, and a media reader for reading information from a disc. If insufficient information is readable from a disc, it may be obtained through a computer network. The system includes a disc transporter for moving received discs to respective internal storage locations. The system includes a data input device for entering disc catalogue data and a data output device such as a display for displaying disc catalogue data. The data input and output devices may be input buttons and a display on a remote control. Each disc and related information is associated with an identifier such that access to disc data may be by restricted by user identifier or content ratings.

摘要翻译： 媒体存储系统包括用于接收媒体盘的盘输入元件，用于弹出盘的盘输出元件以及用于从盘读取信息的媒体读取器。 如果从光盘读取不足的信息，则可以通过计算机网络获得。 该系统包括用于将接收到的盘移动到相应的内部存储位置的盘传送器。 该系统包括用于输入光盘目录数据的数据输入装置和诸如显示盘目录数据的显示器之类的数据输出装置。 数据输入和输出设备可以是遥控器上的输入按钮和显示器。 每个盘和相关信息与标识符相关联，使得对盘数据的访问可能受到用户标识符或内容评级的限制。

公开(公告)号：US07619841B1

公开(公告)日：2009-11-17

申请号：US11286604

申请日：2005-11-23

申请人： Hanan Kupferman

发明人： Hanan Kupferman

IPC分类号： G11B5/02 ,  G11B20/06 ,  G11B5/09

CPC分类号： G11B5/5582 ,  G11B5/59688 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/1217 ,  G11B2020/1284 ,  G11B2220/2516

摘要： A disk drive is disclosed including a disk having a plurality of data tracks, wherein each data track comprises a plurality of data sectors and a plurality of servo sectors, and each servo sector comprises a plurality of servo bursts. A data path comprising a data decoder decodes a data read signal generated as a head passes over the data sectors, and a servo path demodulates a servo read signal generated as the head passes over the servo bursts. The servo path comprises a low pass filter operable to extract a low frequency component from the servo read signal, wherein the low pass filter does not operate on the data read signal. The servo path further comprises a subtractor operable to subtract the low frequency component from the servo read signal to generate a servo burst signal, and a servo demodulator operable to demodulate the servo burst 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，其中每个数据磁道包括多个数据扇区和多个伺服扇区，并且每个伺服扇区包括多个伺服脉冲串。 包括数据解码器的数据路径解码当磁头通过数据扇区时产生的数据读取信号，并且伺服路径解调当磁头通过伺服脉冲串时产生的伺服读取信号。 伺服路径包括低通滤波器，其可操作以从伺服读取信号中提取低频分量，其中低通滤波器不对数据读取信号进行操作。 伺服路径还包括减法器，用于从伺服读取信号中减去低频分量以产生伺服脉冲串信号;以及伺服解调器，用于解调伺服脉冲串信号。

公开(公告)号：US07486456B2

公开(公告)日：2009-02-03

申请号：US11016283

申请日：2004-12-17

申请人： William G. Bliss ,  Razmik Karabed

发明人： William G. Bliss ,  Razmik Karabed

IPC分类号： G11B5/02 ,  G11B20/06 ,  G11B20/08 ,  G11B5/09 ,  G11B15/52 ,  G11B19/02 ,  G11B20/00

CPC分类号： G11B20/10194 ,  G11B20/10009 ,  G11B20/1426 ,  G11B20/1833 ,  G11B2220/2516

摘要： The invention relates to a data modulation method applicable to make data streams tend to have desired properties, useful for clock recovery, making signals more distinguishable, or enforcing run-length conditions. A stream of input data and a corresponding stream of output data are grouped into elements of a finite field. Input elements of said input data are modified by a transform generating output elements of the output data, such that a current output element is a linear combination of a current input element and at least one previous output element. A multiplier applied to at least one previous output element is a non-zero and non-unity element of the finite field. A set of initial conditions inherent to the transform, is selected such that the output elements resulting from the transform tend to have the desired property.

摘要翻译： 本发明涉及一种适用于使数据流倾向于具有期望属性的数据调制方法，对于时钟恢复有用，使得信号更可区分，或者执行运行长度条件。 输入数据流和相应的输出数据流被分组成有限域的元素。 通过产生输出数据的输出元件的变换来修改所述输入数据的输入元件，使得当前输出元件是当前输入元件和至少一个先前输出元件的线性组合。 应用于至少一个先前输出元素的乘数是有限域的非零和非单位元素。 选择变换固有的一组初始条件，使得由变换产生的输出元素倾向于具有期望的属性。

公开(公告)号：US20050063088A1

公开(公告)日：2005-03-24

申请号：US10665264

申请日：2003-09-18

申请人： Richard Ehrlich

发明人： Richard Ehrlich

IPC分类号： G11B5/596 ,  G11B19/28 ,  G11B20/06 ,  G11B20/10

CPC分类号： G11B20/10009 ,  G11B5/596 ,  G11B19/28 ,  G11B20/10055 ,  G11B2020/1284 ,  G11B2020/1484

摘要： Systems are provided for limiting channel control values, such as servo automatic gain control (AGC) values and/or servo phase lock loop (PLL) values, within respective desired ranges. Keeping such values within desired ranges improves servo demodulation robustness.

摘要翻译： 系统被提供用于在相应的期望范围内限制通道控制值，例如伺服自动增益控制（AGC）值和/或伺服锁相环（PLL）值。 将这些值保持在所需范围内可提高伺服解调的鲁棒性。

公开(公告)号：US5663844A

公开(公告)日：1997-09-02

申请号：US156408

申请日：1993-11-19

申请人： Makoto Gohda ,  Shinichi Yamashita

发明人： Makoto Gohda ,  Shinichi Yamashita

IPC分类号： G11B5/035 ,  G11B20/06 ,  H04L25/03

CPC分类号： H04L25/03019 ,  G11B20/06 ,  G11B5/035

摘要： A circuit is provided for emphasizing or suppressing both a frequency corresponding to an upper sideband and a frequency corresponding to a lower sideband with respect to a frequency corresponding to the carrier of a frequency-modulated signal in equalizing the frequency-modulated signal reproduced from the recording medium. With this arrangement, it is possible to effectively compensate for the nonlinearity of a magnetic recording and reproducing system even in the case of a wide deviation. Also, the envelope levels of the portions of a frequency-modulated signal which are formed by frequency-modulating portions of a signal whose levels differ from each other, are extracted to adjust the equalizing characteristics of the equalizing circuit in accordance with the difference between the levels, whereby variations in the characteristics of a reproduction equalizing circuit due to variations with time can be appropriately compensated for.

摘要翻译： 提供一种电路，用于相对于与频率调制信号的载波相对应的频率来强调或抑制对应于上边带的频率和对应于下边带的频率，以均衡从记录再现的频率调制信号 中。 利用这种布置，即使在宽偏差的情况下，也可以有效地补偿磁记录和再现系统的非线性。 此外，提取通过其电平彼此不同的信号的频率调制部分形成的频率调制信号的部分的包络电平，以根据所述均衡电路的差异来调整均衡电路的均衡特性 电平，由此可以适当地补偿由于随时间变化的再现均衡电路的特性的变化。

公开(公告)号：US5592132A

公开(公告)日：1997-01-07

申请号：US433666

申请日：1995-05-04

申请人： Holger Ernst ,  Holger Moll

发明人： Holger Ernst ,  Holger Moll

IPC分类号： H03C3/09 ,  H04N5/922 ,  H04N9/80 ,  H04N9/83 ,  H03C3/00 ,  G11B20/06 ,  H03C3/08

CPC分类号： H03C3/0966 ,  H04N9/80

摘要： In a frequency modulator (1) having an adjusting circuit by which frequency modulator an applied luminance signal of a color video signal that contains synchronization pulses is frequency modulated, while the chrominance signal of the color video signal is modulated on a carrier, that has a quiescent frequency if no color information is available. A capacitor is provided for an automatic mode of operation, and is charged or discharged, respectively, in dependence on the period duration of the modulator output signal and in dependence on the period duration of the quiescent frequency of the chrominance carrier. The steepness of the voltage/frequency characteristic curve of the modulator is set dependent upon the charge condition of the capacitor, while the charging-to-discharging ratio is selected such that the charge of the capacitor is maintained constant on average, if the modulator frequency is equal to a predefined nominal frequency and increases or decreases, respectively, if the modulator frequency falls short of or exceeds the nominal frequency during the synchronization pulses.

摘要翻译： 在具有调制电路的频率调制器（1）中，通过该调整电路，调频电路包含同步脉冲的彩色视频信号的施加亮度信号被调频，而彩色视频信号的色度信号在载波上被调制， 静态频率，如果没有颜色信息可用。 提供了一种用于自动操作模式的电容器，并且根据调制器输出信号的周期持续时间并根据色度载波的静态频率的周期持续时间分别进行充电或放电。 调制器的电压/频率特性曲线的陡度取决于电容器的充电条件，而放电比例选择使得电容器的电荷平均保持恒定，如果调制器频率 如果在同步脉冲期间调制器频率低于或超过标称频率，则等于预定义的标称频率并分别增加或减小。

公开(公告)号：US5430705A

公开(公告)日：1995-07-04

申请号：US676505

申请日：1991-03-28

申请人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Tsutou Asakura ,  Masato Furuya ,  Yoshihisa Koyama ,  Yuji Uchiyama

发明人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Tsutou Asakura ,  Masato Furuya ,  Yoshihisa Koyama ,  Yuji Uchiyama

IPC分类号： G11B9/00 ,  G11B11/00 ,  G11B20/06 ,  G11B20/08 ,  G11B20/10 ,  H04N1/21 ,  H04N5/84 ,  H04N9/802 ,  H04N9/82 ,  G03B31/00

CPC分类号： H04N1/32112 ,  G11B11/00 ,  G11B20/06 ,  G11B20/08 ,  G11B20/10527 ,  G11B9/00 ,  H04N5/84 ,  H04N9/802 ,  H04N9/8216 ,  H04N2201/3264 ,  H04N2201/3277

摘要： In an information recording apparatus, light containing information to be recorded is generated, and a photo-to-electric converting device serves to convert the light into a charge latent image. The photo-to-electric converting device includes a photoconductive member exposed to the light. Information corresponding to the charge latent image is recorded on a recording medium. A first recording device serves to record main information on a first region of the recording medium. A second recording device separate from the first recording device serves to record sub information on a second region of the recording medium. The second region is different from the first region.

摘要翻译： 在信息记录装置中，产生包含要记录的信息的光，并且光电转换装置用于将光转换成电荷潜像。 光电转换装置包括暴露于光的感光体。 与电荷潜像对应的信息被记录在记录介质上。 第一记录装置用于在记录介质的第一区域上记录主信息。 与第一记录装置分离的第二记录装置用于在记录介质的第二区域上记录子信息。 第二个区域与第一个区域不同。