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    IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED INTEGRATED DEMODULATOR FOR HARD DISK DRIVES
    1.
    发明申请
    IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED INTEGRATED DEMODULATOR FOR HARD DISK DRIVES 有权
    用于硬盘驱动器的增强型集成式解调器实现旋转振动振荡器感应

    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。

    Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drives
    3.
    发明授权
    Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drives 有权
    通过增强的集成解调器实现用于硬盘驱动器的自旋扭矩振荡器感应

    公开(公告)号：US08570677B2

    公开(公告)日：2013-10-29

    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 ,  G11B5/02 ,  G11B21/02

    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。

    Early detection of degradation in NAND flash memory
    7.
    发明授权
    Early detection of degradation in NAND flash memory 失效
    早期检测NAND闪存中的劣化

    公开(公告)号：US08422296B2

    公开(公告)日：2013-04-16

    申请号：US12930016

    申请日：2010-12-22

    申请人： Luiz M. Franca-Neto ,  Richard Leo Galbraith ,  Travis Roger Oenning

    发明人： Luiz M. Franca-Neto ,  Richard Leo Galbraith ,  Travis Roger Oenning

    IPC分类号： G11C11/34

    CPC分类号： G11C16/3495

    摘要： Techniques for early detection of degradation in NAND Flash memories by measuring the dispersion of the threshold voltages (VT's), of a set (e.g. page) of NAND Flash memory cells during read operations are described. In an embodiment of the invention the time-to-completion (TTC) values for the read operation for the memory cells are used as a proxy for dispersion of the threshold voltages (VT's). A Dispersion Analyzer determines the dispersion of the set of TTC values. In one embodiment the delta between the maximum and minimum TTC values is used as the dispersion measurement. If the measured TTC dispersion differs by more than a selected amount from a reference dispersion value, a warning signal is provided to indicate that the page of memory has degraded. The warning signal can be used to take appropriate action such as moving the data to a new page.

    摘要翻译： 描述了在读取操作期间通过测量NAND闪存单元组（例如页面）的阈值电压（VT）的偏差来早期检测NAND闪存中的劣化的技术。 在本发明的一个实施例中，用于存储器单元的读取操作的完成时间（TTC）值用作阈值电压（VT）的色散的代理。 色散分析仪确定一组TTC值的色散。 在一个实施例中，使用最大和最小TTC值之间的差值作为色散测量。 如果测量的TTC色散比参考色散值差多于选定量，则提供警告信号以指示存储器页面已经劣化。 警告信号可用于采取适当措施，例如将数据移动到新页面。

    Systems Using Low Density Parity Check Codes For Correcting Errors
    10.
    发明申请
    Systems Using Low Density Parity Check Codes For Correcting Errors 有权
    使用低密度奇偶校验码纠正错误的系统

    公开(公告)号：US20090235142A1

    公开(公告)日：2009-09-17

    申请号：US12046108

    申请日：2008-03-11

    申请人： Richard Leo Galbraith ,  Bruce Alexander Wilson ,  Travis Roger Oenning ,  Mario Blaum ,  Ksenija Lakovic ,  Ivana Djurdjevic

    发明人： Richard Leo Galbraith ,  Bruce Alexander Wilson ,  Travis Roger Oenning ,  Mario Blaum ,  Ksenija Lakovic ,  Ivana Djurdjevic

    IPC分类号： H03M13/11 ,  G06F11/10

    CPC分类号： H03M13/1111 ,  G11B20/18

    摘要： A system corrects errors in a bit stream. The system includes an encoder and a decoder. The encoder encodes the bit stream using a low density parity check code by inserting parity check bits into the bit stream to generate codewords. The decoder decodes the codewords using parity check equations that are based on the low density parity check code. The parity check bits may comprise no more than four percent of the bits in the codewords of the low density parity check code. The low density parity check code can have a minimum separation of at least 7 between any two ones in each row of a parity-check matrix that is based on the low density parity check code. The encoder and the decoder can be defined in hardware using logic circuits that are interconnected to implement a trellis based on the low density parity check code.

    摘要翻译： 系统校正位流中的错误。 该系统包括编码器和解码器。 编码器使用低密度奇偶校验码将奇偶校验位插入比特流来编码比特流以产生码字。 解码器使用基于低密度奇偶校验码的奇偶校验等式来解码码字。 奇偶校验位可以包括不超过低密度奇偶校验码的码字中的比特的百分之四。 低密度奇偶校验码可以在基于低密度奇偶校验码的奇偶校验矩阵的每行中的任何两个之间具有至少7的最小间隔。 编码器和解码器可以使用互连的逻辑电路在硬件中定义，以实现基于低密度奇偶校验码的网格。