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    • 41. 发明授权
    • Disk drive evaluating burst metric
    • 磁盘驱动器评估突发度量
    • US08970980B1
    • 2015-03-03
    • US13169938
    • 2011-06-27
    • Abhishek DhandaWei GuoRuss A. QuisenberryGuoxiao GuoJie Yu
    • Abhishek DhandaWei GuoRuss A. QuisenberryGuoxiao GuoJie Yu
    • G11B21/02G11B5/596
    • G11B5/59688G11B5/59655
    • A disk drive is disclosed comprising a disk and a head actuated over the disk. A burst metric is generated in response to a burst read signal. The burst metric comprises at least one of an alpha metric comprising a ratio of a first burst amplitude of a first phased based servo burst measured at a first radial offset to a second burst amplitude of a second phased based servo burst measured at a second radial offset, a harmonic metric comprising a ratio of a first harmonic of the burst read signal as the head is moved radially over the disk to a higher harmonic of the burst read signal as the head is moved radially over the disk, and a spiral track crossing metric comprising a first and second interval each representing a partial duration of the read element crossing a spiral track.
    • 公开了一种磁盘驱动器,其包括盘和在盘上致动的磁头。 响应于突发读取信号产生突发度量。 突发度量包括以下中的至少一个:α度量,其包括在第一径向偏移处测量的第一基于相位的猝发脉冲的第一脉冲串幅度与在第二径向偏移量测量的基于第二相位的伺服脉冲串的第二脉冲串幅度的比率 当磁头径向移动到磁盘上时,当磁头在磁盘上径向移动到脉冲串读取信号的高次谐波时,包括突发读取信号的第一谐波的比率的谐波度量,以及螺旋轨迹交叉度量 包括第一和第二间隔,每个间隔代表穿过螺旋轨道的读取元件的部分持续时间。
    • 45. 发明授权
    • Method for modeling a magnetic tunnel junction with spin-polarized current writing
    • 用自旋极化电流写入建模磁性隧道结的方法
    • US08443318B2
    • 2013-05-14
    • US12809991
    • 2008-12-16
    • Guillaume PrenatWei Guo
    • Guillaume PrenatWei Guo
    • G06F9/455G06F17/50
    • G11C11/16G06F17/5036
    • The junction comprising a stack of at least two magnetic layers, a first layer, for example a soft magnetic layer with controllable magnetization, and a second layer, for example a hard magnetic layer with fixed magnetization, the magnetization of the soft layer being described by a uniform magnetic moment, the dynamic behavior of the junction being modeled by an equivalent electrical circuit comprising at least two coupled parts: a first part representing the stack of the layers, through which a current flows corresponding to the polarized current flowing through said layers whose resistance across its terminals depends on three voltages representing the three dimensions of the magnetic moment along three axes, modeling the tunnel effect; a second part representing the behavior of the magnetic moment, comprising three circuits each representing a dimension of the magnetic moment by the three voltages, each of the three voltages depending on the voltages in the other dimensions and on the voltage across the terminals of the stack, modeling the torque effect exerted by the polarized current on the magnetization of the soft layer.
    • 所述接合部包括至少两个磁性层的堆叠,第一层,例如具有可控磁化的软磁性层,以及第二层,例如具有固定磁化强度的硬磁性层,软层的磁化由 均匀的磁矩,结点的动态行为由包括至少两个耦合部分的等效电路建模:表示层的堆叠的第一部分,电流流过对应于流过所述层的极化电流的电流 其端子电阻取决于表示沿三轴的磁矩三维的三个电压,对隧道效应进行建模; 表示磁矩行为的第二部分,包括三个电路,每个电路表示三个电压的磁矩的尺寸,三个电压中的每一个取决于其它尺寸的电压和堆叠端子上的电压 对由极化电流施加的扭矩效应对软层的磁化进行建模。
    • 49. 发明申请
    • ADAPTIVE AMBIENT SOUND SUPPRESSION AND SPEECH TRACKING
    • 自适应声音抑制和语音跟踪
    • US20110178798A1
    • 2011-07-21
    • US12690827
    • 2010-01-20
    • Jason FlaksIvan TashevDuncan McKayXudong NiRobert HeitkampWei GuoJohn TardifLeo ShingMichael Baseflug
    • Jason FlaksIvan TashevDuncan McKayXudong NiRobert HeitkampWei GuoJohn TardifLeo ShingMichael Baseflug
    • G10L21/02
    • H04S3/008G10L21/0208G10L21/0272G10L2021/02085G10L2021/02166
    • A device for suppressing ambient sounds from speech received by a microphone array is provided. One embodiment of the device comprises a microphone array, a processor, an analog-to-digital converter, and memory comprising instructions stored therein that are executable by the processor. The instructions stored in the memory are configured to receive a plurality of digital sound signals, each digital sound signal based on an analog sound signal originating at the microphone array, receive a multi-channel speaker signal, generate a monophonic approximation signal of the multi-channel speaker signal, apply a linear acoustic echo canceller to suppress a first ambient sound portion of each digital sound signal, generate a combined directionally-adaptive sound signal from a combination of each digital sound signal by a combination of time-invariant and adaptive beamforming techniques, and apply one or more nonlinear noise suppression techniques to suppress a second ambient sound portion of the combined directionally-adaptive sound signal.
    • 提供了一种用于抑制由麦克风阵列接收的语音的环境声音的装置。 该设备的一个实施例包括麦克风阵列,处理器,模数转换器和包含可由处理器执行的存储在其中的指令的存储器。 存储在存储器中的指令被配置为接收多个数字声音信号,基于源自麦克风阵列的模拟声音信号的每个数字声音信号,接收多声道扬声器信号,产生多声道扬声器信号的单声道近似信号, 应用线性声学回声消除器来抑制每个数字声音信号的第一环境声音部分,通过时不变和自适应波束成形技术的组合从每个数字声音信号的组合产生组合的定向自适应声音信号 并且应用一个或多个非线性噪声抑制技术来抑制组合的定向自适应声音信号的第二环境声音部分。