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1. 发明授权

US08929017B2 Systems and methods for SNR measurement using equalized data 有权
标题翻译：使用均衡数据进行SNR测量的系统和方法
公开(公告)号：US08929017B2
公开(公告)日：2015-01-06
申请号：US13316953
申请日：2011-12-12
申请人： Haitao Xia , Ming Jin , Dahua Qin , Shaohua Yang
发明人： Haitao Xia , Ming Jin , Dahua Qin , Shaohua Yang
IPC分类号： G11B5/035 , G11B5/596 , G11B20/10
CPC分类号： G11B5/59605 , G11B5/035 , G11B5/09 , G11B5/59622 , G11B20/10046 , G11B2220/415
摘要： Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing system is discussed that includes: an equalizer circuit, a signal to noise ratio calculation circuit, and a parameter adjustment circuit. The equalizer circuit is operable to equalize a data input to yield an equalized output. The signal to noise ratio calculation circuit is operable to calculate a signal to noise ratio of the equalized output based at least in part on a noise power derived from the equalized output. The parameter adjustment circuit is operable to adjust a parameter based at least in part on the signal to noise ratio.
摘要翻译：本发明的各种实施例提供了用于数据处理的系统和方法。例如，讨论了包括均衡器电路，信噪比计算电路和参数调整电路的数据处理系统。均衡器电路可操作以均衡数据输入以产生均衡的输出。信噪比计算电路可用于至少部分地基于从均衡输出得到的噪声功率来计算均衡输出的信噪比。参数调整电路可操作以至少部分地基于信噪比来调整参数。

2. 发明申请

US20130148233A1 Systems and Methods for SNR Measurement Using Equalized Data 有权
标题翻译：使用均衡数据进行SNR测量的系统和方法
公开(公告)号：US20130148233A1
公开(公告)日：2013-06-13
申请号：US13316953
申请日：2011-12-12
申请人： Haitao Xia , Ming Jin , Dahua Qin , Shaohua Yang
发明人： Haitao Xia , Ming Jin , Dahua Qin , Shaohua Yang
IPC分类号： H03H7/30 , G11B5/035
CPC分类号： G11B5/59605 , G11B5/035 , G11B5/09 , G11B5/59622 , G11B20/10046 , G11B2220/415
摘要： Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing system is discussed that includes: an equalizer circuit, a signal to noise ratio calculation circuit, and a parameter adjustment circuit. The equalizer circuit is operable to equalize a data input to yield an equalized output. The signal to noise ratio calculation circuit is operable to calculate a signal to noise ratio of the equalized output based at least in part on a noise power derived from the equalized output. The parameter adjustment circuit is operable to adjust a parameter based at least in part on the signal to noise ratio.
摘要翻译：本发明的各种实施例提供了用于数据处理的系统和方法。例如，讨论了包括均衡器电路，信噪比计算电路和参数调整电路的数据处理系统。均衡器电路可操作以均衡数据输入以产生均衡的输出。信噪比计算电路可用于至少部分地基于从均衡输出得到的噪声功率来计算均衡输出的信噪比。参数调整电路可操作以至少部分地基于信噪比来调整参数。

3. 发明授权

US08031428B1 Single-pass spiral self-servo-write 有权
标题翻译：单通螺旋自伺服写
公开(公告)号：US08031428B1
公开(公告)日：2011-10-04
申请号：US12853328
申请日：2010-08-10
申请人： David Rutherford
发明人： David Rutherford
IPC分类号： G11B21/02
CPC分类号： G11B5/59633 , G11B5/59605 , G11B5/59666
摘要： A self-servo-write system including a timing control module and a position control module. The timing control module is configured to generate (i) timing information of a first set of servo spirals and (ii) timing control signals for writing a second set of final servo wedges based on the timing information. The position control module is configured to generate (i) position information of the first set of servo spirals and (ii) positioning control signals for writing the second set of final servo wedges based on the timing information. Less than half of the servo spirals in the first set of servo spirals are over-written while writing the second set of final servo wedges. A ratio of a first number of final servo wedges in the second set of final servo wedges to a second number of servo spirals in the first set of servo spirals is a non-integer greater than one.
摘要翻译：一种自伺服写入系统，包括定时控制模块和位置控制模块。定时控制模块被配置为产生（i）第一组伺服螺旋的定时信息和（ii）基于定时信息写入第二组最终伺服楔的定时控制信号。位置控制模块被配置为基于定时信息产生（i）第一组伺服螺旋的位置信息和（ii）用于写入第二组最终伺服楔的定位控制信号。在写入第二组最终伺服楔时，第一组伺服螺旋中伺服螺旋的不到一半被重写。第二组最终伺服楔形中的第一数量的最终伺服楔与第一组伺服螺旋中的第二数量的伺服螺旋的比率是大于1的非整数。

4. 发明申请

US20100271723A1 HARMONIC SELECTION FOR TRACK FOLLOWING ON A HARD DISK DRIVE 有权
标题翻译： HARMONIC选择跟踪在硬盘驱动器
公开(公告)号：US20100271723A1
公开(公告)日：2010-10-28
申请号：US12429417
申请日：2009-04-24
申请人： Jr-Yi SHEN , Zhi Wang
发明人： Jr-Yi SHEN , Zhi Wang
IPC分类号： G11B27/36 , G11B21/02
CPC分类号： G11B5/59627 , G11B5/59605 , G11B19/048 , G11B20/1816 , G11B2220/2516
摘要： Harmonic selection for track following is described for a hard disk drive comprising at least one magnetic disk capable of storing data and spinning, a controller capable of controlling a read/write head capable of reading and writing data while following a track on a surface of the at least one magnetic disk, and a memory device capable of storing data relating to the operation of the hard disk drive. A drive function test on the hard disk drive is performed, during which harmonic frequencies are identified which cause disturbances for the hard disk drive. Data regarding the harmonic frequencies which cause the greatest disturbances for the hard disk drive is stored in the memory device. The data regarding the harmonic frequencies which cause the greatest disturbances is forwarded to the controller upon the at least one magnetic disk spinning.
摘要翻译：对于包括至少一个能够存储数据和旋转的磁盘的硬盘驱动器描述了跟踪跟踪的谐波选择，控制器能够控制能够读取和写入数据的读/写头，同时跟踪在至少一个磁盘，以及能够存储与硬盘驱动器的操作有关的数据的存储器件。执行硬盘驱动器上的驱动功能测试，在此期间识别出谐波频率，从而导致硬盘驱动器的干扰。有关造成硬盘驱动器干扰最大的谐波频率的数据存储在存储器件中。关于造成最大扰动的谐波频率的数据在至少一个磁盘旋转时转发到控制器。

5. 发明申请

US20100097714A1 GENERATING PES USING READBACK SIGNAL DISTORTION 有权
标题翻译：使用阅读信号失真生成PES
公开(公告)号：US20100097714A1
公开(公告)日：2010-04-22
申请号：US12255776
申请日：2008-10-22
申请人： Walter Richard Eppler , Inci Ozgunes , Xiangjun Feng , Kevin Arthur Gomez , Mark David Bedillion , Stephen John Wrazien
发明人： Walter Richard Eppler , Inci Ozgunes , Xiangjun Feng , Kevin Arthur Gomez , Mark David Bedillion , Stephen John Wrazien
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B5/59605 , G11B20/10046 , G11B20/10425 , G11B2020/1281 , G11B2220/2516
摘要： A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.
摘要翻译：数据存储系统包括具有多个数据扇区的存储介质和与数据存储介质进行通信的磁头。当从数据存储介质读取信息时，磁头产生回读信号。计算单元提取回读信号的失真分量，并从失真分量生成位置误差信号。

6. 发明授权

US07697233B1 Disk drive comprising a servo accelerator implementing state space equations for a plurality of task objects 失效
标题翻译：磁盘驱动器包括对多个任务对象执行状态空间方程的伺服加速器
公开(公告)号：US07697233B1
公开(公告)日：2010-04-13
申请号：US12255542
申请日：2008-10-21
申请人： George J. Bennett , Orhan Beker , Aswartha Narayana
发明人： George J. Bennett , Orhan Beker , Aswartha Narayana
IPC分类号： G11B21/02 , G11B5/55 , G11B5/596
CPC分类号： G11B5/5547 , G11B5/59605
摘要： A disk drive is disclosed comprising a disk, a head, and an actuator for actuating the head over the disk. The disk drive further comprises a state variable memory for storing a plurality of state variable sets, wherein each state variable set comprises a plurality of state variables and each state variable set corresponds to a task object. A coefficient memory for stores a plurality of coefficient sets, wherein each coefficient set comprises a plurality of coefficients and each coefficient set corresponds to a task object. A task object is executed by initializing a base state register to address a selected one of the state variable sets in the state variable memory, and initializing a base coefficient register to address a selected one of the coefficient sets in the coefficient memory.
摘要翻译：公开了一种磁盘驱动器，其包括用于在盘上致动磁头的磁盘，磁头和致动器。磁盘驱动器还包括用于存储多个状态变量集合的状态变量存储器，其中每个状态变量集合包括多个状态变量，并且每个状态变量集对应于任务对象。一种用于存储多个系数组的系数存储器，其中每个系数组包括多个系数，并且每个系数组对应于任务对象。通过初始化基本状态寄存器来对状态变量存储器中的状态变量集合中的一个选择的一个进行初始化，并且初始化基本系数寄存器以对系数存储器中的所选择的一个系数集进行寻址来执行任务对象。

7. 发明授权

US07652445B2 On-chip compensation for a fully differential voice coil motor control 有权
标题翻译：片内补偿全差分音圈电机控制
公开(公告)号：US07652445B2
公开(公告)日：2010-01-26
申请号：US11733712
申请日：2007-04-10
申请人： Degang Xia , Robert E. Whyte, Jr.
发明人： Degang Xia , Robert E. Whyte, Jr.
IPC分类号： G05D23/275
CPC分类号： G11B5/5526 , G11B5/59605 , H02P25/034
摘要： A disk drive controller including a differential voice coil motor control function is disclosed. The differential voice coil motor control function includes an on-chip compensation network for the inner control loop, including a resistor formed of one or more MOS transistors connected in series. The gate of the MOS transistors in the compensation network is driven with a bias voltage based on a tuning current, where the tuning current is derived so that it varies with process and temperature variations of the integrated circuit, for example with variations in an on-chip capacitor. The on-chip compensation network can be tuned with sufficient precision to properly compensate the inner control loop to provide the desired frequency response in driving the voice coil motor in the disk drive.
摘要翻译：公开了一种包括差分音圈电机控制功能的磁盘驱动器控制器。差分音圈电机控制功能包括用于内部控制回路的片上补偿网络，包括由串联连接的一个或多个MOS晶体管形成的电阻器。补偿网络中的MOS晶体管的栅极由基于调谐电流的偏置电压驱动，其中调谐电流被导出，使得其随集成电路的过程和温度变化而变化，例如，片式电容器。可以以足够的精度调整片上补偿网络，以适当地补偿内部控制回路，以在驱动盘驱动器中的音圈电机时提供期望的频率响应。

8. 发明授权

US07576939B2 Discontinuous mode back EMF measurement 有权
标题翻译：不连续模式反电动势测量
公开(公告)号：US07576939B2
公开(公告)日：2009-08-18
申请号：US11940521
申请日：2007-11-15
申请人： KianKeong Ooi , KeXiu Liu , Shuyu Cao , MingZhong Ding
发明人： KianKeong Ooi , KeXiu Liu , Shuyu Cao , MingZhong Ding
IPC分类号： G11B21/02
CPC分类号： H02P6/182 , G11B5/022 , G11B5/5526 , G11B5/59605
摘要： A terminal voltage of an actuator motor is measured while the actuator motor is in a high impedance state. An internal voltage of the actuator motor is measured, and a back-EMF voltage of the actuator motor is estimated in response to the terminal voltage of the actuator motor and the internal voltage of the actuator motor. A drive current supplied to the actuator motor is controlled in response to the estimated back-EMF.
摘要翻译：在执行器电动机处于高阻抗状态的同时测量致动器电动机的端子电压。测量致动器电动机的内部电压，并且响应于致动器电动机的端子电压和致动器电动机的内部电压来估计致动器电动机的反电动势电压。响应于估计的反电动势来控制提供给致动器电动机的驱动电流。

9. 发明授权

US07522368B2 Differential voice coil motor control 有权
标题翻译：差动音圈电机控制
公开(公告)号：US07522368B2
公开(公告)日：2009-04-21
申请号：US11733717
申请日：2007-04-10
申请人： Degang Xia , Robert E. Whyte, Jr.
发明人： Degang Xia , Robert E. Whyte, Jr.
IPC分类号： G11B5/02 , G11B5/596
CPC分类号： G11B5/5526 , G11B5/59605 , H02P25/034
摘要： A disk drive controller including a differential voice coil motor control function is disclosed. The differential voice coil motor control function includes an on-chip compensation network for the inner control loop, including a resistor formed of one or more MOS transistors connected in series. The gate of the MOS transistors in the compensation network is driven with a bias voltage based on a tuning current, where the tuning current is derived so that it varies with process and temperature variations of the integrated circuit, for example with variations in an on-chip capacitor. The on-chip compensation network can be tuned with sufficient precision to properly compensate the inner control loop to provide the desired frequency response in driving the voice coil motor in the disk drive.
摘要翻译：公开了一种包括差分音圈电机控制功能的磁盘驱动器控制器。差分音圈电机控制功能包括用于内部控制回路的片上补偿网络，包括由串联连接的一个或多个MOS晶体管形成的电阻器。补偿网络中的MOS晶体管的栅极由基于调谐电流的偏置电压驱动，其中调谐电流被导出，使得其随集成电路的过程和温度变化而变化，例如，片式电容器。可以以足够的精度调整片上补偿网络，以适当地补偿内部控制回路，以在驱动盘驱动器中的音圈电机时提供期望的频率响应。

10. 发明授权

US07489619B2 Probe position error detecting method and apparatus in probe-based data storage system 失效
标题翻译：基于探针的数据存储系统中探头位置误差检测方法及装置
公开(公告)号：US07489619B2
公开(公告)日：2009-02-10
申请号：US11202242
申请日：2005-08-12
申请人： Dong-ki Min , Seung-bum Hong
发明人： Dong-ki Min , Seung-bum Hong
IPC分类号： G11B9/00
CPC分类号： G11B5/59605 , B82Y10/00 , G11B5/59627 , G11B9/14 , G11B9/1454 , G11B20/1426 , Y10S977/947
摘要： A probe position error detecting method and apparatus in a probe-based data storage system are provided. The method includes preparing servo codes, which are Gray codes. The Gray codes have a Hamming distance of 1 and satisfy alternate conditions for Q (a natural number) and Q+1, the conditions being based on the numbers of “1” bits of codewords of the Gray codes. The method further includes detecting a probe position error from a signal read by a servo probe when the servo probe consecutively scans “1” bits of codewords of the servo codes when tracking. The apparatus includes: a plurality of servo probes; a tracking condition checker; a plurality of position error detectors that correspond to the plurality of servo probes, respectively; and an average position error calculator. Probe position errors are be detected with a stable noise characteristic using fewer probes.
摘要翻译：提供了一种基于探针的数据存储系统中的探针位置误差检测方法和装置。该方法包括制作格雷码的伺服码。格雷码的汉明距离为1，满足Q（自然数）和Q + 1的替代条件，条件基于格雷码的码字“1”比特数。该方法还包括当伺服探头在跟踪时连续扫描伺服代码的“1”位的码元时，从伺服探针读取的信号中检测探头位置误差。该装置包括：多个伺服探针; 跟踪条件检查器; 分别对应于多个伺服探针的多个位置误差检测器; 和平均位置误差计算器。使用更少的探头，可以用稳定的噪声特性检测探头位置误差。

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