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1. 发明授权

US06246346B1 Storage system employing high-rate code with constraint on run length between occurrences of an influential pattern 失效
标题翻译：存储系统采用具有约束条件的高速率代码，影响模式发生之间的运行长度
公开(公告)号：US06246346B1
公开(公告)日：2001-06-12
申请号：US08957763
申请日：1997-10-24
申请人： Robert Leslie Cloke , Patrick James Lee , Steven William McLaughlin
发明人： Robert Leslie Cloke , Patrick James Lee , Steven William McLaughlin
IPC分类号： H03M500
CPC分类号： H03M5/00 , H03M7/00 , H03M7/46
摘要： A storage system employs a method for encoding a sequence of input data blocks into a sequence of codewords. Each input data block includes a first predetermined number of bits (the data block length). Each codeword includes a second predetermined number of bits (the codeword length). The code rate, i.e., the ratio of the first number to the second number, is greater than ¾. The method is performed in a sampled-data channel in a storage system; and the channel includes a circuit the performance of which is adversely affected by an excessive run length of bits between occurrences of a predetermined influential pattern. Preferably, the influential pattern is a two-bit sequence of adjacent 1's, which favorably influences the performance of a timing recovery circuit. The method includes receiving the sequence of input data blocks and generating the sequence of codewords responsive to the received sequence of input data blocks. The sequence of codewords has a constraint on the maximum run length of bits between occurrences of the influential pattern, the maximum run length of bits being less than or equal to the codeword length.
摘要翻译：存储系统采用将输入数据块序列编码成码字序列的方法。每个输入数据块包括第一预定数量的位（数据块长度）。每个码字包括第二预定数量的比特（码字长度）。码率，即第一个数字与第二个数字的比率大于3。该方法在存储系统中的采样数据信道中执行; 并且该通道包括电路，其性能受预定影响模式的出现之间的位的过度游程长度的不利影响。优选地，影响模式是相邻1的两位序列，其有利地影响定时恢复电路的性能。该方法包括接收输入数据块的序列并响应于所接收的输入数据块的序列产生码字序列。码字的序列对影响模式的出现之间的比特的最大游程长度具有约束，比特的最大游程长度小于或等于码字长度。

2. 发明授权

US5822143A Decision feedback equalization implementation of partial-response signaling in a magnetic recording channel 失效
标题翻译：磁记录通道中部分响应信号的判决反馈均衡实现
公开(公告)号：US5822143A
公开(公告)日：1998-10-13
申请号：US661573
申请日：1996-06-11
申请人： Robert Leslie Cloke , Patrick James Lee
发明人： Robert Leslie Cloke , Patrick James Lee
IPC分类号： G11B5/09 , G11B20/10 , G11B5/35
CPC分类号： G11B20/10046 , G11B20/10009 , G11B5/09
摘要： A partial-response maximum-likelihood (PRML) sequence detector with decision feedback equalization (DFE) for a disk drive read channel. The symbol recovery method for a disk drive read channel produces a sequence of samples X.sub.n of a magnetic readback signal with amplitudes representing the readback signal during corresponding sample intervals n=1-N. A DFE circuit generates a sequence of equalized samples y.sub.n and includes a feed-forward filter that removes precursor ISI from the sequence of sample signals x.sub.n to produce a sequence of feed-forward equalized samples w.sub.n, detection logic that translates the sequence of equalized samples y.sub.n into a sequence of detected symbols y.sub.n, and a feedback filter that filters the sequence of detected symbols y.sub.n to produce a sequence of equalization feedback values e.sub.n to offset postcursor ISI remaining in the sequence of feed-forward equalized samples w.sub.n. A combinational circuit receives the feed-forward equalized samples w.sub.n and the feedback values e.sub.n and combines a sample w.sub.k with an equalization feedback value e.sub.k to produce an equalized sample y.sub.k for each sample interval k in the range of k=1-N. A PRML sequence detector, such as a Viterbi detector, is used with the DFE circuit to recover a user data symbol a.sub.k for sample interval k corresponding to the equalized sample y.sub.k in response to the sequence of equalized samples y.sub.n. The detected symbols y.sub.n used in the feedback path are generated using separate detectors, which allows for feedback with a delay of only one sample interval.
摘要翻译：具有用于磁盘驱动器读通道的判决反馈均衡（DFE）的部分响应最大似然（PRML）序列检测器。磁盘驱动器读取通道的符号恢复方法产生磁回读信号的样本序列Xn，其中幅度表示相应的采样间隔n = 1-N期间的回读信号。 DFE电路产生均衡样本序列yn，并且包括前馈滤波器，其从采样信号序列xn中去除前体ISI以产生前馈均衡样本序列wn，将均衡样本序列yn 成为检测符号序列+ E，cir y + EE n，以及反馈滤波器，其对检测到的符号序列+ E，cir y + EE n进行滤波，以产生均衡反馈值en的序列，以抵消后前馈均衡样本序列wn。组合电路接收前馈均衡样本wn和反馈值en，并将采样wk与均衡反馈值ek组合，以产生在k = 1-N范围内的每个采样间隔k的均衡采样y k。与DFE电路一起使用诸如维特比检测器的PRML序列检测器，以响应于均衡样本序列yn来恢复对应于均衡样本y k的采样间隔k的用户数据符号+ E，cir a + EE k 。在反馈路径中使用的检测符号+ E，cir y + EE n使用单独的检测器生成，这允许仅具有一个采样间隔的延迟的反馈。

3. 发明授权

US06292912B1 Disk drive having built-in self-test system for characterizing performance of the drive 失效
标题翻译：具有内置自检系统的磁盘驱动器，用于表征驱动器的性能
公开(公告)号：US06292912B1
公开(公告)日：2001-09-18
申请号：US09032220
申请日：1998-02-27
申请人： Robert Leslie Cloke , Patrick James Lee , Howard Anthony Baumer
发明人： Robert Leslie Cloke , Patrick James Lee , Howard Anthony Baumer
IPC分类号： G11C2900
CPC分类号： G11B20/1816 , G06F11/3485
摘要： A disk drive has a normal mode of operation and a built-in self-test (BIST) mode of operation for producing a sequence of channel metrics {&Ggr;n}. The disk drive includes a recording surface having a plurality of bit cells and a transducer for reading the plurality of bit cells to produce a noise-corrupted read signal. The disk drive further includes means responsive to the noise-corrupted read signal for generating a sequence of observed samples {yn}, the sequence of observed samples {yn} forming a sequence of observed-sample subsequences {Yn}. An expected sample generator operates during the BIST mode of operation to provide a sequence of expected samples {wn}, the sequence of expected samples forming a sequence of expected-sample subsequences {Wn}. A channel metrics &Ggr;n computation system computes a sequence of channel metrics {&Ggr;n}. Each channel metric &Ggr;n is a function of a distance determined from one of the observed-sample subsequences Yn to the corresponding expected-sample subsequence Wn. Each channel metric &Ggr;n is independent of the earliest observed sample in every prior observed-sample subsequence Yn and the earliest expected sample in every prior expected-sample subsequence Wn.
摘要翻译：磁盘驱动器具有正常的操作模式和内置的自检（BIST）操作模式，用于产生一系列信道度量{＆Ggr; n}。磁盘驱动器包括具有多个位单元的记录表面和用于读取多个位单元以产生噪声损坏的读取信号的换能器。磁盘驱动器还包括响应于噪声损坏的读取信号的装置，用于产生观察到的样本序列{yn}，观察样本序列{yn}形成观察样本子序列{Yn}的序列。期望的样本发生器在BIST操作模式期间操作以提供预期样本序列（wn}，预期样本的序列形成预期样本子序列{Wn}的序列。信道度量＆Ggrn计算系统计算信道度量序列{＆Ggr; n}。每个信道度量＆Ggr; n是从观测样本子序列Yn到相应的预期样本子序列Wn确定的距离的函数。每个通道度量＆Ggr; n独立于每个先前观察样品子序列Yn中最早观察到的样本，以及每个先前预期样本子序列Wn中最早的预期样本。

4. 发明授权

US06208477B1 Hard disk drive having a built-in self-test for measuring non-linear signal distortion 失效
标题翻译：具有内置自检功能的硬盘驱动器用于测量非线性信号失真
公开(公告)号：US06208477B1
公开(公告)日：2001-03-27
申请号：US08870515
申请日：1997-06-06
申请人： Robert Leslie Cloke , Patrick James Lee
发明人： Robert Leslie Cloke , Patrick James Lee
IPC分类号： G11B2736
CPC分类号： G11B20/10481 , G11B5/012 , G11B5/09 , G11B20/10009 , G11B20/22 , G11B27/36 , G11B2220/20
摘要： In a hard disk drive, a semiconductor chip includes a circuit used in a built-in self test (“BIST”) to determine an amplitude of a dibit echo for characterizing nonlinear distortion of a readback signal. Preferably, write precompensation is performed based on results of the BIST to minimize distortion attributable to intersymbol interference. A generator is used to generate a maximal length pseudo-random sequence. This maximal length pseudo-random sequence is input to a correlator which performs a correlation between the maximal length pseudo-random bit sequence and a readback signal responsive to the pseudo-random sequence that was stored onto a disk of the hard disk drive. In one embodiment, a seed value stored in memory is loaded into the generator upon detection of a synchronization signal read from the disk. With the appropriate seed value loaded into the generator, a specific pseudo-random bit sequence corresponding to a sample point of interest is then generated. The cross-correlation between this specific pseudo-random sequence with the readback signal produces a sample point corresponding to the dibit echo. By iteratively generating sample points corresponding to the echo, the peak amplitude of that dibit echo can be accurately estimated. The magnitude of the peak amplitude of the dibit echo is then used to characterize the nonlinear intersymbol interference, which in turn, can be used to perform write precompensation as well as other functions. With this semiconductor chip, a hard disk drive can accurately characterize nonlinear intersymbol interference in the field as part of a built-in self-test function.
摘要翻译：在硬盘驱动器中，半导体芯片包括用于内置自检（“BIST”）中用于确定用于表征回读信号的非线性失真的双重回波的幅度的电路。优选地，基于BIST的结果执行写入预补偿，以最小化符号码间干扰的失真。生成器用于生成最大长度伪随机序列。该最大长度伪随机序列被输入到相关器，该相关器执行响应于存储在硬盘驱动器的盘上的伪随机序列的最大长度伪随机比特序列和回读信号之间的相关性。在一个实施例中，存储在存储器中的种子值在检测到从盘读取的同步信号时被加载到生成器中。随着适当的种子值被加载到生成器中，然后产生对应于一个采样点的特定伪随机比特序列。该特定伪随机序列与回读信号之间的互相关产生对应于双向回波的采样点。通过迭代产生对应于回波的采样点，可以准确地估计该双重回波的峰值幅度。然后使用双重回波的峰值幅度的大小来表征非线性符号间干扰，其反过来可以用于执行写入预补偿以及其他功能。使用该半导体芯片，硬盘驱动器可以精确地表征现场的非线性码间干扰作为内置自检功能的一部分。

5. 发明授权

US06693760B1 Preamplifier circuit configurable to allow simultaneous read and write operations for self-servo writing a disk drive 有权
标题翻译：前置放大器电路可配置为允许同时读写操作，用于自动写入磁盘驱动器
公开(公告)号：US06693760B1
公开(公告)日：2004-02-17
申请号：US09540445
申请日：2000-03-31
申请人： Mohamad T. Krounbi , John Cuda , Jack M. Chue , Robert Leslie Cloke , David Price Turner , Gary L. Dunbar
发明人： Mohamad T. Krounbi , John Cuda , Jack M. Chue , Robert Leslie Cloke , David Price Turner , Gary L. Dunbar
IPC分类号： G11B2102
CPC分类号： G11B5/59633 , G11B5/024
摘要： A preamplifier circuit is disclosed comprising a data input for receiving write data, a read signal output for outputting an amplified read signal, a read signal input for receiving a read signal from a read element, and a write signal output for supplying a write signal to a write element. The preamplifier circuit further comprises a first amplifier circuit, responsive to the write data, for generating the write signal supplied to the write element, and a second amplifier circuit for amplifying the read signal from the read element to generate the amplified read signal output via the read signal output. A head control circuit, responsive to head select data, simultaneously enables the first and second amplifier circuits to perform a simultaneous read and write operation.
摘要翻译：公开了一种前置放大器电路，包括用于接收写入数据的数据输入端，用于输出放大的读取信号的读取信号输出端，用于从读取元件接收读取信号的读取信号输入端和用于将写入信号提供给写元素。前置放大器电路还包括响应于写入数据的第一放大器电路，用于产生提供给写入元件的写入信号，以及第二放大器电路，用于放大来自读取元件的读取信号，以产生经由读信号输出。响应于头部选择数据的头部控制电路同时使第一和第二放大器电路执行同时的读取和写入操作。

6. 发明授权

US06600620B1 Self-servo writing a disk drive by propagating interleaved sets of timing clocks and servo bursts during alternate time intervals 有权
标题翻译：通过在交替时间间隔期间传播交错的定时时钟和伺服脉冲串来自动伺服写入磁盘驱动器
公开(公告)号：US06600620B1
公开(公告)日：2003-07-29
申请号：US09541136
申请日：2000-03-31
申请人： Mohamad T. Krounbi , John Cuda , Jack M. Chue , Robert Leslie Cloke , David Price Turner , Gary L. Dunbar
发明人： Mohamad T. Krounbi , John Cuda , Jack M. Chue , Robert Leslie Cloke , David Price Turner , Gary L. Dunbar
IPC分类号： G11B2102
CPC分类号： G11B5/59644
摘要： The present invention may be regarded as a self-servo writing disk drive comprising a head having a read element radially offset from a write element. During a first time interval, the read element is positioned over a first radial location to read first A clock data to generate first circumferential timing information and first A servo bursts to generate first position control information. The first position control information is used for positioning the write element over a second radial location, and the first circumferential timing information is used for writing second B clock data and second B servo bursts to the second radial location. During a second time interval, the read element is positioned over the first radial location to read first B clock data to generate second circumferential timing information and first B servo bursts to generate second position control information. The second position control information is used for positioning the write element over the second radial location, and the second circumferential timing information is used for writing second A clock data and second A servo bursts to the second radial location.
摘要翻译：本发明可以被认为是包括具有从写入元件径向偏移的读取元件的头的自伺服写入盘驱动器。在第一时间间隔期间，读取元件位于第一径向位置上以读取第一A时钟数据以产生第一周期定时信息和第一A伺服脉冲串以产生第一位置控制信息。第一位置控制信息用于在第二径向位置定位写元件，并且第一周期定时信息用于将第二B时钟数据和第二B伺服脉冲串写入第二径向位置。在第二时间间隔期间，读取元件位于第一径向位置上以读取第一B时钟数据以产生第二周期定时信息和第一B伺服突发，以产生第二位置控制信息。第二位置控制信息用于将写元件定位在第二径向位置上，并且第二周期定时信息用于将第二A时钟数据和第二A伺服脉冲串写入第二径向位置。

7. 发明授权

US06178056B1 Disk drive employing state variable trap registers for providing stored servo and user data state variables to sampled-data channel 有权
标题翻译：采用状态变量陷阱寄存器的磁盘驱动器，用于向采样数据通道提供存储的伺服和用户数据状态变量
公开(公告)号：US06178056B1
公开(公告)日：2001-01-23
申请号：US09293487
申请日：1999-04-15
申请人： Robert Leslie Cloke , Richard W. Hull , Vafa James Rakshani , David Price Turner
发明人： Robert Leslie Cloke , Richard W. Hull , Vafa James Rakshani , David Price Turner
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/5965 , G11B20/10009 , G11B20/10037 , G11B20/1217 , G11B20/1258 , G11B20/1403 , G11B27/3027 , G11B2020/10888 , G11B2020/1232 , G11B2020/1267 , G11B2020/1275 , G11B2020/1282 , G11B2020/1287 , G11B2020/1292 , G11B2220/20 , G11B2220/2516
摘要： A disk drive includes a disk surface having a plurality of tracks arranged in an embedded servo format including servo track segments for storing servo data and data track segments for storing user data. The disk drive includes a read element operative during a user-data read operation for reading data from the disk surface to produce a time-multiplexed analog read signal that during a revolution of the disk represents analog read servo data during each of a first set of time intervals and represents analog read user data during each of a second set of time intervals. The disk drive includes a sampled signal processing circuit that generates a servo state variable while processing the time-multiplexed read signal during the first servo time interval and a user data state variable while processing the time-multiplexed read signal during the first user data time interval. The disk drive includes a servo state variable trap register for storing the servo state variable at the end of the first servo time interval. The disk drive includes a data state variable trap register for storing the user data state variable at the end of the first user data time interval. The disk drive includes a control circuit for providing the stored servo state variable to the sampled signal processing circuit at the beginning of the second servo time interval. The control circuit provides the stored user data state variable to the sampled signal processing circuit at the beginning of the second user data time interval.
摘要翻译：磁盘驱动器包括具有以嵌入式伺服格式布置的多个磁道的磁盘表面，包括用于存储伺服数据的伺服磁道段和用于存储用户数据的数据磁道段。磁盘驱动器包括在用户数据读取操作期间操作用于从盘表面读取数据的读取元件，以产生时间复用的模拟读取信号，该时间复用模拟读取信号在盘的转动期间代表模拟读取伺服数据，每个第一组时间间隔，并且在第二组时间间隔中的每一个期间表示模拟读取用户数据。磁盘驱动器包括采样信号处理电路，其在第一伺服时间间隔期间处理时间复用的读取信号和在第一用户数据时间间隔期间处理时间复用的读取信号的用户数据状态变量时产生伺服状态变量。磁盘驱动器包括伺服状态变量陷阱寄存器，用于在第一伺服时间间隔结束时存储伺服状态变量。磁盘驱动器包括用于在第一用户数据时间间隔结束时存储用户数据状态变量的数据状态变量陷阱寄存器。磁盘驱动器包括控制电路，用于在第二伺服时间间隔开始时将所存储的伺服状态变量提供给采样信号处理电路。控制电路在第二用户数据时间间隔开始时将采集的用户数据状态变量提供给采样信号处理电路。

8. 发明授权

US06441981B1 Disk drive including a recording surface employing servo zones recorded at a channel frequency different from data zones 有权
标题翻译：磁盘驱动器包括采用以不同于数据区的通道频率记录的伺服区的记录表面
公开(公告)号：US06441981B1
公开(公告)日：2002-08-27
申请号：US09846056
申请日：2001-05-01
申请人： Robert Leslie Cloke , Richard William Hull , Vafa James Rakshani , David Price Turner
发明人： Robert Leslie Cloke , Richard William Hull , Vafa James Rakshani , David Price Turner
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/5965 , G11B20/10009 , G11B20/10037 , G11B20/1217 , G11B20/1258 , G11B20/1403 , G11B27/3027 , G11B2020/10888 , G11B2020/1232 , G11B2020/1267 , G11B2020/1275 , G11B2020/1282 , G11B2020/1287 , G11B2020/1292 , G11B2220/20 , G11B2220/2516
摘要： A disk drive includes a disk having a disk surface, the disk surface having a plurality of tracks arranged in an embedded servo format. The disk surface includes a plurality of radially-extending user-data regions and a plurality of radially-extending servo-data regions. Each user-data region has a plurality of data zones in each of which user data are stored in a plurality of track segments at a data channel frequency particular to that data zone. Each servo-data region has a plurality of servo zones in each of which servo data are stored in a plurality of track segments at a servo channel frequency particular to that servo zone, wherein in at least one of the tracks having servo data and user data, the servo channel frequency differs from the data channel frequency.
摘要翻译：磁盘驱动器包括具有盘表面的盘，盘表面具有以嵌入式伺服格式布置的多个轨道。盘表面包括多个径向延伸的用户数据区域和多个径向延伸的伺服数据区域。每个用户数据区域具有多个数据区域，每个数据区域中的每一个用户数据以特定于该数据区域的数据通道频率存储在多个轨道段中。每个伺服数据区域具有多个伺服区，每个伺服区中的伺服数据以特定于该伺服区的伺服通道频率存储在多个磁道段中，其中至少一个磁道具有伺服数据和用户数据伺服通道频率与数据通道频率不同。

9. 发明授权

US06411452B1 Disk drive employing read error tolerant sync mark detection 失效
标题翻译：磁盘驱动器采用读容错同步标记检测
公开(公告)号：US06411452B1
公开(公告)日：2002-06-25
申请号：US08815352
申请日：1997-03-11
申请人： Robert Leslie Cloke
发明人： Robert Leslie Cloke
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/5965 , G11B20/10009 , G11B20/10037 , G11B20/1217 , G11B20/1258 , G11B20/1403 , G11B27/3027 , G11B2020/10888 , G11B2020/1232 , G11B2020/1267 , G11B2020/1275 , G11B2020/1282 , G11B2020/1287 , G11B2020/1292 , G11B2220/20 , G11B2220/2516
摘要： A hard disk drive has a pattern detector for providing fault-tolerant detection of a data sync mark represented by a substring of a concatenated string of error-prone read symbols and for providing a reduced risk that a nonmark substring of the concatenated string of error-prone read symbols will be misdetected as a sync mark. The data sync mark write string corresponds to an ordered set of m expected symbols selected to have maximum distance from all non-mark substrings of m consecutive expected symbols that exist in the concatenated string of expected symbols.
摘要翻译：硬盘驱动器具有模式检测器，用于提供容错检测由容易错误的读符号的级联字符串的子串表示的数据同步标记，并且用于提供降低的错误级联串联的非标记子串的风险，容易读取的符号将被误检为同步标记。数据同步标记写入字符串对应于选择为与存在于预期符号的级联串中的m个连续期望符号的所有非标记子串具有最大距离的m个预期符号的有序集合。

10. 发明授权

US06262857B1 Disk drive including a recording surface employing servo zones with banded data zones 失效
标题翻译：磁盘驱动器包括采用具有带状数据区域的伺服区域的记录表面
公开(公告)号：US06262857B1
公开(公告)日：2001-07-17
申请号：US09103674
申请日：1998-06-23
申请人： Richard William Hull , Vafa James Rakshani , David Price Turner , Robert Leslie Cloke
发明人： Richard William Hull , Vafa James Rakshani , David Price Turner , Robert Leslie Cloke
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/5965 , G11B20/10009 , G11B20/10037 , G11B20/1217 , G11B20/1258 , G11B20/1403 , G11B27/3027 , G11B2020/10888 , G11B2020/1232 , G11B2020/1267 , G11B2020/1275 , G11B2020/1282 , G11B2020/1287 , G11B2020/1292 , G11B2220/20 , G11B2220/2516
摘要： A disk drive includes a disk having a disk surface, the disk surface having a plurality of tracks arranged in an embedded servo format. The disk surface includes a plurality of radially-extending user-data regions and a plurality of radially-extending servo-data regions. Each user-data region has a plurality of data zones in each of which user data are stored in a plurality of track segments at a data channel frequency particular to that data zone. Each servo-data region has a plurality of servo zones in each of which servo data are stored in a plurality of track segments at a servo channel frequency particular to that servo zone. The servo channel frequency differs from the data channel frequency for at least one track.
摘要翻译：磁盘驱动器包括具有盘表面的盘，盘表面具有以嵌入式伺服格式布置的多个轨道。盘表面包括多个径向延伸的用户数据区域和多个径向延伸的伺服数据区域。每个用户数据区域具有多个数据区域，每个数据区域中的每一个用户数据以特定于该数据区域的数据通道频率存储在多个轨道段中。每个伺服数据区域具有多个伺服区域，每个伺服区域中的每个伺服区域以特定于该伺服区域的伺服通道频率存储在多个磁道段中。伺服通道频率与至少一个轨道的数据通道频率不同。

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