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248 条记录 (耗时 0.055 秒)

    Sigma-delta (ΣΔ) analog-to-digital converter (ADC) structure incorporating a direct sampling mixer
    41.
    发明授权
    Sigma-delta (ΣΔ) analog-to-digital converter (ADC) structure incorporating a direct sampling mixer 有权
    结合直接采样混频器的Sigma-delta（SigmaDelta）模数转换器（ADC）结构

    公开(公告)号：US07057540B2

    公开(公告)日：2006-06-06

    申请号：US10273217

    申请日：2002-10-17

    申请人： Khurram Muhammad ,  Robert B. Staszewski ,  Feng Chen ,  Dirk Leipold

    发明人： Khurram Muhammad ,  Robert B. Staszewski ,  Feng Chen ,  Dirk Leipold

    IPC分类号： H03M3/00

    CPC分类号： H03M3/47 ,  H03M3/496 ,  H04B1/1036

    摘要： A sigma-delta analog-to-digital converter-offers advantages such as noise shaping and high frequency operation. However, a sampling circuit needed to provide a highly oversampled discrete-time sample stream with low noise characteristics is difficult to design and implement. The present invention provides a sigma-delta mixer 300 with such a sampling circuit 310. The present invention discloses a sampling circuit using switched capacitors 307, 308, and 309 with low noise characteristics and at the same time is capable of providing a highly oversampled discrete-time sample stream.

    摘要翻译： Σ-Δ模数转换器 - 具有噪声整形和高频操作等优点。 然而，需要提供具有低噪声特性的高度过采样离散时间采样流所需的采样电路难以设计和实现。 本发明提供了具有这种采样电路310的Σ-Δ混合器300。 本发明公开了一种使用具有低噪声特性的开关电容器307,308和309的采样电路，同时能够提供高度过采样的离散时间采样流。

    Sigma-delta modulator with passive bandpass loop filter
    42.
    发明授权
    Sigma-delta modulator with passive bandpass loop filter 有权
    带无源带通环路滤波器的Σ-Δ调制器

    公开(公告)号：US07006023B2

    公开(公告)日：2006-02-28

    申请号：US10661019

    申请日：2003-09-12

    申请人： Feng Chen

    发明人： Feng Chen

    IPC分类号： H03M3/00

    CPC分类号： H03M3/404 ,  H03M3/43 ,  H03M3/456 ,  H03M3/47

    摘要： Digitizing a signal includes sampling and holding an analog signal to yield a sampled signal, where the analog signal includes information. The sampled signal is filtered at a passive filter circuit to yield a filtered signal. The passive filter circuit includes at least one passive element and the filtered signal is characterized by a bandpass response. The filtered signal is quantized to yield a digital signal, where the digital signal corresponds to the analog signal and the digital signal includes the information.

    摘要翻译： 数字化信号包括采样和保持模拟信号以产生采样信号，其中模拟信号包括信息。 采样信号在无源滤波器电路进行滤波以产生滤波信号。 无源滤波器电路包括至少一个无源元件，滤波后的信号的特征在于带通响应。 经滤波的信号被量化以产生数字信号，其中数字信号对应于模拟信号，并且数字信号包括信息。

    Polishing apparatus and method for forming an integrated circuit
    43.
    发明授权
    Polishing apparatus and method for forming an integrated circuit 有权
    抛光装置和形成集成电路的方法

    公开(公告)号：US06964598B1

    公开(公告)日：2005-11-15

    申请号：US09904828

    申请日：2001-07-12

    申请人： Lup San Leong ,  Feng Chen ,  Charles Lin

    发明人： Lup San Leong ,  Feng Chen ,  Charles Lin

    IPC分类号： B24B37/04 ,  H01L21/3105 ,  H01L21/321 ,  B24B49/00 ,  B24B51/00

    CPC分类号： B24B37/042 ,  B24B37/20 ,  H01L21/31053 ,  H01L21/3212

    摘要： In one embodiment, a semiconductor substrate (38) is uniformly polished using a polishing pad (16) that has a first polishing region (26), a second polishing region (28), and a third polishing region (30). The semiconductor substrate (38) is aligned to the polishing pad (16), such that the center of the semiconductor substrate (38) overlies the second polishing region (28), and the edge of the semiconductor substrate overlies the first polishing region (26) and the third polishing region (30). During polishing, the semiconductor substrate (38) is not radially oscillated over the surface of the polishing pad, and as a result a more uniform polishing rate is achieved across the semiconductor substrate (38). This allows the semiconductor substrate (38) to be uniformly polished from center to edge, and increases die yield because die located on the semiconductor substrate (38) are not over polished.

    摘要翻译： 在一个实施例中，使用具有第一抛光区域（26），第二抛光区域（28）和第三抛光区域（30）的抛光垫（16）均匀地抛光半导体衬底（38）。 半导体衬底（38）与抛光垫（16）对准，使得半导体衬底（38）的中心覆盖在第二抛光区域（28）上，并且半导体衬底的边缘覆盖在第一抛光区域（26） ）和第三抛光区域（30）。 在抛光期间，半导体衬底（38）不在抛光垫的表面上径向摆动，结果在半导体衬底（38）上实现了更均匀的抛光速率。 这允许半导体衬底（38）从中心到边缘被均匀抛光，并且由于位于半导体衬底（38）上的裸芯未被抛光，所以提高了裸片的产量。

    Vetiver oil extracts as termite repellent and toxicant
    45.
    发明授权
    Vetiver oil extracts as termite repellent and toxicant 有权
    香根草油提取物为白蚁驱避剂和毒物

    公开(公告)号：US06890960B1

    公开(公告)日：2005-05-10

    申请号：US09856760

    申请日：2000-10-18

    申请人： Gregg Henderson ,  Roger A. Laine ,  Donald O. Heumann ,  Feng Chen ,  Betty C. R. Zhu

    发明人： Gregg Henderson ,  Roger A. Laine ,  Donald O. Heumann ,  Feng Chen ,  Betty C. R. Zhu

    IPC分类号： A01N31/00 ,  A01N31/06 ,  A01N35/00 ,  A01N35/06

    CPC分类号： A01N31/06 ,  A01N35/06 ,  A01N27/00 ,  A01N25/08 ,  A01N2300/00

    摘要： Extracts of vetiver oil were found to significantly repel termites. In one extract, nootkatone was isolated and found to be a significant repellent and toxicant of termites. Nootkatone significantly decreased food consumption, decreased tunneling behavior, and increased mortality in termites. Nootkatone is an effective repellent and toxicant of termites either by itself or as an addition to other materials or substrates, including mulches made from vetiver grass roots or other wood products. Nootkatone can also be used to protect construction wood from attack by Formosan subterranean termites. Nootkatone as a repellent is non-toxic to humans and other mammals and is environmentally safe. In addition, α-cedrene was found to be a weak termite repellent; and both zizanol and bicyclovetivenol were found to be repellents and toxicants of termites.

    摘要翻译： 发现香根草油的提取物显着排斥白蚁。 在一种提取物中，分离出诺塔卡酮，发现它是一种重要的驱避剂和有毒的白蚁。 Nootkatone显着降低了食物消耗，降低了隧道行为，并增加了白蚁死亡率。 Nootkatone是一种有效的驱虫剂和有毒物质的白蚁，其本身或作为其他材料或底物的添加剂，包括由香根草草根或其他木制品制成的覆盖物。 Nootkatone也可用于保护建筑木材免受台山地下白蚁的攻击。 Nootkatone作为驱避剂对人类和其他哺乳动物无毒，对环境无害。 此外，发现α-雪松是一种弱白蚁驱虫剂; 发现齐赞醇和双环己酮醇都是白蚁的驱避剂和毒物。

    Method of inducing the formation of neurofibrillary tangles in transgenic animals
    47.
    发明申请
    Method of inducing the formation of neurofibrillary tangles in transgenic animals 审中-公开
    诱导转基因动物神经原纤维缠结形成的方法

    公开(公告)号：US20050015819A1

    公开(公告)日：2005-01-20

    申请号：US10487546

    申请日：2002-08-24

    申请人： Jurgen Gotz ,  Roger Nitsch ,  Feng Chen

    发明人： Jurgen Gotz ,  Roger Nitsch ,  Feng Chen

    IPC分类号： A01K67/027 ,  C07K14/47 ,  C12N15/09 ,  C12N15/85 ,  C12N15/00

    CPC分类号： C07K14/4711 ,  A01K67/0275 ,  A01K67/0278 ,  A01K2207/15 ,  A01K2217/00 ,  A01K2217/05 ,  A01K2227/105 ,  A01K2267/0312 ,  A01K2267/0318 ,  C12N15/8509

    摘要： The present invention discloses a method and an in-vivo assay system useful for the identification and testing of modulating agents as well as for the validation of therapies of neurodegenerative diseases associated with the formation of neurofibrillary tangles, in particular Alzheimer's disease. The present invention is based on the surprising finding that injection of β-amyloid Aβ42 fibrils into brains of P301L mutant tau transgenic mice caused several-fold increases in the numbers and an accelerated production of neurofibrillary tangles in cell bodies predominantly within the amygdala. The induced neurofibrillary tangles occurred as early as 18 days after Aβ42 injections and displayed striking features of neurofibrillary tangles of several human neurodegenerative diseases, particularly Alzheimer's disease.

    摘要翻译： 本发明公开了一种可用于鉴定和测试调节剂的方法和体内测定系统，以及用于验证与形成神经原纤维缠结，特别是阿尔茨海默病有关的神经变性疾病的疗法。 本发明基于惊人的发现，即将β-淀粉状蛋白Aβ42原纤维注射到P301L突变体tau转基因小鼠的脑中，导致数量增加了数倍，并且主要在杏仁核内的细胞体中加速了神经原纤维缠结的产生。 诱导的神经原纤维缠结发生早于Abeta42注射后18天，并显示出几种人类神经变性疾病，特别是阿尔茨海默病的神经原纤维缠结的显着特征。

    Differential, low voltage swing reducer
    48.
    发明授权
    Differential, low voltage swing reducer 失效
    差动，低压摆动减速机

    公开(公告)号：US06732136B1

    公开(公告)日：2004-05-04

    申请号：US09471201

    申请日：1999-12-23

    申请人： Feng Chen ,  Thomas Fletcher ,  Shahram Jamshidi

    发明人： Feng Chen ,  Thomas Fletcher ,  Shahram Jamshidi

    IPC分类号： G06F750

    CPC分类号： G06F7/607

    摘要： A small swing reducer circuit. An apparatus includes a first number of input terminals including at least two input terminals coupled to receive a differential small swing signal and a reducer circuit to generate differential, small swing sum and carry output signals based on data received via the input terminals.

    摘要翻译： 小摆动减速电路。 一种装置包括：第一数量的输入端子，包括耦合以接收差分小摆动信号的至少两个输入端子;以及还原电路，用于根据经由输入端子接收到的数据产生微分，小摆幅和输入输出信号。

    Process for the separation of sugars
    49.
    发明授权
    Process for the separation of sugars 有权
    糖的分离过程

    公开(公告)号：US06451123B1

    公开(公告)日：2002-09-17

    申请号：US09481732

    申请日：2000-01-11

    申请人： Michael Saska ,  Feng Chen

    发明人： Michael Saska ,  Feng Chen

    IPC分类号： B01D1508

    CPC分类号： B01D15/185 ,  B01J41/05 ,  B01J41/20

    摘要： Improved separations of xylose, mannose, galactose, arabinose, glucose, xylitol, arabitol; sorbitol, galactitol, or mannitol (and other monosaccharides and sugar alcohols) from other sugars and sugar alcohols may be achieved by chromatography over hydroxyl-form anion exchange surfaces prepared from anion exchange resins at relatively low hydroxyl concentrations. When a strong base anion exchange resin, such as a chloride-form strong base anion exchange resin, is conditioned with a low concentration of hydroxyl (for example, an NaOH solution with a concentration between 0.1 and 1000 mM, most preferably between 1 and 10 mM), the conditioned resin separates a number of sugars and sugar alcohols from one another, while still allowing ready desorption from the resin.

    摘要翻译： 木糖，甘露糖，半乳糖，阿拉伯糖，葡萄糖，木糖醇，阿糖醇的改进分离; 来自其它糖和糖醇的山梨糖醇，半乳糖醇或甘露醇（和其它单糖和糖醇）可以通过在相对低的羟基浓度下由阴离子交换树脂制备的羟基形式的阴离子交换表面进行层析来实现。 当强碱性阴离子交换树脂（如氯化物形式的强碱阴离子交换树脂）用低浓度的羟基调节（例如浓度为0.1至1000mM的NaOH溶液，最优选1至10 mM）时，调节的树脂将许多糖和糖醇彼此分离，同时仍允许从树脂中解吸。

    Priority encoder
    50.
    发明授权
    Priority encoder 有权
    优先编码器

    公开(公告)号：US06385631B1

    公开(公告)日：2002-05-07

    申请号：US09176618

    申请日：1998-10-21

    申请人： Feng Chen ,  Thomas D. Fletcher

    发明人： Feng Chen ,  Thomas D. Fletcher

    IPC分类号： G06F700

    CPC分类号： G06F7/74

    摘要： A low voltage swing priority encoder comprising pass cells to provide differential voltages indicative of the leading one of a binary tuple. A tree structure with bypass paths allows for the minimization of the number of pass cells in a signal propagation path so as to reduce signal delay. The pass cells are responsive to control voltages indicative of various Boolean functions of the binary tuple, and a pulse voltage signal is applied to the pass cells. In response to the control voltages and the pulse voltage signal, the pass cells provide differential voltages so that voltage swing of the differential voltages are kept below the supply voltage to reduce dynamic power dissipation. Sense amplifiers sense the differential voltages to provide the final logic level indicative of the leading one of the binary tuple.

    摘要翻译： 低电压摆动优先编码器包括通过单元以提供指示二进制元组中的前导元件的差分电压。 具有旁路路径的树结构允许最小化信号传播路径中的传递单元的数量，以便减少信号延迟。 传递单元响应于指示二进制元组的各种布尔函数的控制电压，并且脉冲电压信号被施加到通过单元。 响应于控制电压和脉冲电压信号，通电单元提供差分电压，使得差分电压的电压摆幅保持低于电源电压以减小动态功耗。 感测放大器感测差分电压以提供指示二进制元组中的主要一个的最终逻辑电平。