利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

78 条记录 (耗时 0.024 秒)

    Servo positioning adjustment
    63.
    发明授权
    Servo positioning adjustment 有权
    伺服定位调整

    公开(公告)号：US07477473B2

    公开(公告)日：2009-01-13

    申请号：US11655799

    申请日：2007-01-18

    申请人： Ara Patapoutian ,  Zoran Coric

    发明人： Ara Patapoutian ,  Zoran Coric

    IPC分类号： G11B5/596 ,  G05B11/01

    CPC分类号： G11B5/59627

    摘要： An apparatus and associated method for observing an analog position signal of a control object in relation to positional indicia, recalling a previously stored runout correction value associated with the positional indicia, and calculating a corrected position signal for the control object in relation to the position signal and the runout correction value.

    摘要翻译： 一种用于观察与位置标记相关的控制对象的模拟位置信号的装置和相关联的方法，回收与该位置标记相关联的先前存储的跳动校正值，以及针对该位置信号计算控制对象的校正位置信号 和跳动校正值。

    Error recovery strategies for iterative decoders
    65.
    发明授权
    Error recovery strategies for iterative decoders 有权
    迭代解码器的错误恢复策略

    公开(公告)号：US07266750B1

    公开(公告)日：2007-09-04

    申请号：US10454326

    申请日：2003-06-04

    申请人： Ara Patapoutian ,  Bruce Buch ,  Rose Shao

    发明人： Ara Patapoutian ,  Bruce Buch ,  Rose Shao

    IPC分类号： H03M13/00 ,  H03M13/03

    CPC分类号： H03M13/1111 ,  H03M13/1105 ,  H03M13/3738 ,  H03M13/3746 ,  H03M13/3784 ,  H03M13/616 ,  H03M13/6325 ,  H04L1/0057

    摘要： An iterative decoder is controlled to iteratively decode a block by performing one or more decoding iterations for the block during a predetermined block time. The iterative decoder is further controlled to perform more decoding iterations for the block during a time in which the hardware of the iterative decoder is available, if the block fails to converge to correct data during the predetermined block time. The iterative decoder uses a parity-check matrix and can be configured to process that parity-check matrix for parallel, sequential or a combination of parallel and sequential (“hybrid”) parity constraint updates.

    摘要翻译： 控制迭代解码器以在预定的块时间期间对块执行一个或多个解码迭代来迭代地解码块。 迭代解码器被进一步控制，以便在迭代解码器的硬件可用的时间期间对块进行更多的解码迭代，如果块在预定块时间期间未能收敛以校正数据。 迭代解码器使用奇偶校验矩阵，并且可以被配置为处理用于并行，顺序或并行和顺序（“混合”）奇偶校验约束更新的组合的奇偶校验矩阵。

    Class of fixed partial response targets in a PRML sampled data detection channel
    66.
    发明授权
    Class of fixed partial response targets in a PRML sampled data detection channel 失效
    PRML采样数据检测通道中固定部分响应目标的类别

    公开(公告)号：US06249398B1

    公开(公告)日：2001-06-19

    申请号：US09034933

    申请日：1998-03-04

    申请人： Kevin Fisher ,  Kelly K. Fitzpatrick ,  Cory Modlin ,  Ara Patapoutian ,  Jeffrey L. Sonntag ,  Necip Sayiner

    发明人： Kevin Fisher ,  Kelly K. Fitzpatrick ,  Cory Modlin ,  Ara Patapoutian ,  Jeffrey L. Sonntag ,  Necip Sayiner

    IPC分类号： G11B5035

    CPC分类号： G11B20/10055 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10296

    摘要： A new class of fixed partial response targets are disclosed for use in a PRML magnetic medium read channel. The preferred embodiment exhibits an equalization response characterized by the polynomial 7+4*D−4*D2−5*D3−2*D4, where D represents the unit delay operator. This read channel target provides improved matching to the inherent magnetic channel over the known canonical class of targets (1−D)(1+D){circumflex over ( )}N, and thereby reduces equalization losses. The improved spectral matching reduces amplification of noise in the channel, thereby reducing bit-error-rates. The new class of targets also exhibits a spectral null at DC, reducing problems for offset cancellation circuitry and making the disk drive less sensitive to thermal asperities. It also exhibits a spectral depression rather than a spectral null at the Nyquist frequency, making quasi-catastrophic error sequences virtually impossible. The new class of target simplifies coding and allows RLL code ratios that approach unity, improving effective recording densities, while significantly reducing BER.

    摘要翻译： 公开了一类新的固定部分响应目标，用于PRML磁介质读取通道。 优选实施例表现出由多项式7 + 4 * D-4 * D2-5 * D3-2 * D4表征的均衡响应，其中D表示单位延迟算子。 这个读通道目标在已知的典型目标类别（1-D）（1 + D）{circumflex over（）} N上提供与固有磁通道的改进的匹配，从而减少均衡损失。 改进的频谱匹配减少了信道中噪声的放大，从而降低了误码率。 新类别的目标还在DC处表现出光谱零点，减少偏移消除电路的问题，并使磁盘驱动器对热凹凸不敏感。 在奈奎斯特频率下，它也表现出光谱抑制而不是光谱零点，使得准灾难性误差序列实际上是不可能的。 新类别的目标简化了编码，并允许RLL代码比率达到统一，提高了有效的记录密度，同时显着降低了BER。

    Multiuse data channel
    68.
    发明授权
    Multiuse data channel 有权
    多用数据通道

    公开(公告)号：US09130596B2

    公开(公告)日：2015-09-08

    申请号：US13172457

    申请日：2011-06-29

    申请人： Ara Patapoutian ,  Hieu V. Nguyen ,  Prafulla Bollampalli Reddy

    发明人： Ara Patapoutian ,  Hieu V. Nguyen ,  Prafulla Bollampalli Reddy

    IPC分类号： H03M13/29 ,  H03M13/00 ,  H03M13/09 ,  H03M13/11 ,  H03M13/15

    CPC分类号： H04L1/0045 ,  G06F11/1072 ,  G11C29/52 ,  H03M13/09 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/2906 ,  H03M13/6516 ,  H03M13/6561

    摘要： Presented is a data channel with selectable components, such as encoders or decoders. Also, data having different data signal characteristics can be processed through a data channel based on the data signal characteristics. Further, a data channel may have independent encoding path and an independent decoding path. For example, a first data transmission having first data signal characteristics may be processed via a data channel based on a first selected set of components of the data channel and a second data transmission having second data signal characteristics different than the first data signal characteristics may be processed via the data channel using a second selected set of components in the data channel. The first selected set of components may be different than the second selected set of components, but may share one or more common components.

    摘要翻译： 提出了具有可选组件的数据通道，例如编码器或解码器。 此外，可以基于数据信号特性通过数据信道来处理具有不同数据信号特性的数据。 此外，数据信道可以具有独立的编码路径和独立的解码路径。 例如，具有第一数据信号特性的第一数据传输可以经由数据信道基于数据信道的第一选定组件集合进行处理，并且具有与第一数据信号特性不同的第二数据信号特性的第二数据传输可以是 通过数据信道使用数据信道中的第二组选择的组来处理。 第一选择的组件集合可以不同于第二选择的组件集合，但是可以共享一个或多个公共组件。

    Programmable soft-output Viterbi algorithm system and method
    69.
    发明授权
    Programmable soft-output Viterbi algorithm system and method 有权
    可编程软输出维特比算法系统及方法

    公开(公告)号：US08307267B2

    公开(公告)日：2012-11-06

    申请号：US12048830

    申请日：2008-03-14

    申请人： Raman Venkataramani ,  Alexander Kuznetsov ,  Ara Patapoutian

    发明人： Raman Venkataramani ,  Alexander Kuznetsov ,  Ara Patapoutian

    IPC分类号： H03M13/03

    CPC分类号： G11B20/10009 ,  G11B20/10287 ,  G11B20/10296 ,  G11B2220/2516

    摘要： In a particular embodiment, a channel detector is disclosed that includes a programmable look-up table (LUT) to relate user bits to channel bits. The programmable LUT is adapted to be implemented on a state trellis of arbitrary radix. The channel detector further includes a sectional precoder coupled to a channel and having access to the programmable LUT. The sectional precoder is adapted to map channel bits to user bits and vice versa using a programmable LUT.

    摘要翻译： 在特定实施例中，公开了一种信道检测器，其包括用于将用户比特与信道比特相关联的可编程查找表（LUT）。 可编程LUT适于在任意基数的状态网格上实现。 信道检测器还包括耦合到信道并且访问可编程LUT的分段预编码器。 分段预编码器适于使用可编程LUT将通道位映射到用户位，反之亦然。

    Reuse of information from memory read operations
    70.
    发明授权
    Reuse of information from memory read operations 有权
    从内存读取操作重新使用信息

    公开(公告)号：US08243511B2

    公开(公告)日：2012-08-14

    申请号：US12891475

    申请日：2010-09-27

    申请人： Ara Patapoutian ,  Bernardo Rub ,  Bruce D. Buch

    发明人： Ara Patapoutian ,  Bernardo Rub ,  Bruce D. Buch

    IPC分类号： G11C16/08 ,  G11C16/28

    CPC分类号： G11C11/5628 ,  G11C16/0483 ,  G11C16/06 ,  G11C16/3418

    摘要： A nominal reference read operation compares analog voltages of the memory cells to at least one nominal reference voltage. A shifted reference read operation compares the analog voltages of the memory cells to at least one shifted reference voltage that is shifted from the nominal reference voltage to compensate for an expected change in the analog voltages of the memory cells. Data stored in the memory cells is decoded by a first decoding process that uses the information from either the nominal reference read operation or the shifted reference read operation. The data stored in the memory cells is decoded by a second decoding process that uses the information from both the nominal reference read operation and the shifted reference read operation.

    摘要翻译： 标称参考读取操作将存储器单元的模拟电压与至少一个标称参考电压进行比较。 移位的参考读取操作将存储器单元的模拟电压与从标称参考电压偏移的至少一个移位的参考电压进行比较，以补偿存储器单元的模拟电压的预期变化。 通过使用来自标称参考读取操作或移位参考读取操作的信息的第一解码处理对存储单元中存储的数据进行解码。 通过使用来自标称参考读取操作和偏移的参考读取操作的信息的第二解码处理来对存储单元中存储的数据进行解码。