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    • 1. 发明授权
    • Return-type current-reuse mixer
    • 返回型电流再利用混频器
    • US08766698B2
    • 2014-07-01
    • US13978864
    • 2011-08-18
    • Jianhui WuChao ChenHong LiLongxing ShiZixuan WangJie SunZhiyi YeMeng Zhang
    • Jianhui WuChao ChenHong LiLongxing ShiZixuan WangJie SunZhiyi YeMeng Zhang
    • G06G7/12G06F7/44
    • H03D7/1425
    • A return-type current-reuse mixer having a transconductance/amplification stage, a mixing stage, and a high-pass and a low-pass filter network. The transconductance/amplification stage has a current-reuse CMOS topology wherein an input frequency signal is converted into a frequency current, low-frequency components are removed from the frequency current by the high-pass filter network, the frequency current is fed into the mixing stage, modulation occurs in the mixing stage, and then an intermediate-frequency signal is generated and output. Once high-frequency components are removed from the intermediate-frequency signal by the low-pass filter network, the intermediate-frequency signal is sent again for input into the transconductance/amplification stage, then amplified in the transconductance/amplification stage and output. The mixer transconductance/amplification stage employs a current-reuse technique. The input frequency and the output intermediate-frequency signal share a common transconductance/amplification stage. The mixer reduces power consumption, simplifies the circuit topology, and provides high conversion gain.
    • 具有跨导/放大级,混频级以及高通和低通滤波器网络的返回型电流再利用混频器。 跨导/放大级具有电流再利用CMOS拓扑,其中输入频率信号被转换成频率电流,低频分量由高通滤波器网络从频率电流中去除,频率电流被馈送到混频 在混合阶段发生调制,然后产生并输出中频信号。 一旦通过低通滤波器网络从中频信号中去除了高频分量,则再次发送中频信号以输入到跨导/放大级,然后在跨导/放大级中放大并输出。 混频器跨导/放大级采用电流复用技术。 输入频率和输出中频信号共用一个跨导/放大级。 混频器降低了功耗,简化了电路拓扑结构,并提供了高转换增益。
    • 2. 发明申请
    • RETURN-TYPE CURRENT-REUSE MIXER
    • 返回型电流 - 再利用混合器
    • US20130300490A1
    • 2013-11-14
    • US13978864
    • 2011-08-18
    • Jianhui WuChao ChenHong LiLongxing ShiZixuan WangJie SunZhiyi YeMeng Zhang
    • Jianhui WuChao ChenHong LiLongxing ShiZixuan WangJie SunZhiyi YeMeng Zhang
    • H03D7/14
    • H03D7/1425
    • A return-type current-reuse mixer having a transconductance/amplification stage, a mixing stage, and a high-pass and a low-pass filter network. The transconductance/amplification stage has a current-reuse CMOS topology wherein an input frequency signal is converted into a frequency current, low-frequency components are removed from the frequency current by the high-pass filter network, the frequency current is fed into the mixing stage, modulation occurs in the mixing stage, and then an intermediate-frequency signal is generated and output. Once high-frequency components are removed from the intermediate-frequency signal by the low-pass filter network, the intermediate-frequency signal is sent again for input into the transconductance/amplification stage, then amplified in the transconductance/amplification stage and output. The mixer transconductance/amplification stage employs a current-reuse technique. The input frequency and the output intermediate-frequency signal share a common transconductance/amplification stage. The mixer reduces power consumption, simplifies the circuit topology, and provides high conversion gain.
    • 具有跨导/放大级,混频级以及高通和低通滤波器网络的返回型电流再利用混频器。 跨导/放大级具有电流再利用CMOS拓扑,其中输入频率信号被转换成频率电流,低频分量由高通滤波器网络从频率电流中去除,频率电流被馈送到混频 在混合阶段发生调制,然后产生并输出中频信号。 一旦通过低通滤波器网络从中频信号中去除了高频分量,则再次发送中频信号以输入到跨导/放大级,然后在跨导/放大级中放大并输出。 混频器跨导/放大级采用电流复用技术。 输入频率和输出中频信号共用一个跨导/放大级。 混频器降低了功耗,简化了电路拓扑结构,并提供了高转换增益。
    • 6. 发明授权
    • Carbon nanoring and method for preparing the same
    • 碳纳米及其制备方法
    • US08834982B2
    • 2014-09-16
    • US13994487
    • 2011-12-07
    • Wensheng YangJie SunXu ChenHaimei Liu
    • Wensheng YangJie SunXu ChenHaimei Liu
    • B32B3/02C01B31/02B82Y40/00
    • C01B31/0293B82Y30/00B82Y40/00C01B31/0206C01B32/15Y10T428/21
    • The invention relates to a carbon nanoring and a method for preparing the same. The carbon nanoring according to the present invention is composed of monolayered or multilayered coaxial carbon rings, wherein the carbon ring has a structure similar to that of a closed ring system formed by graphite sheet being rolled, and each of an axial dimension and a radial dimension of the carbon nanoring is nanoscale with the axial dimension being smaller than the radial dimension. The invention further provides a method for preparing the above carbon nanoring including calcinating in an inert atmosphere or a reducing atmosphere a layered double hydroxides obtained by intercalating a long-chain alkyl anion and a carbon source molecule, growing a carbon nanoring within a confined region between layers under the catalysis of the metal element in layers, and removing the metal and the metal oxide by dissolving in an acid to obtain the carbon nanoring. By using this method, the carbon nanoring can be effectively controlled in terms of the axial dimension, the radial dimension, and the number of layers of the carbon ring thereof. The carbon nanoring provided by the present invention has the nano-ring shaped structure and the excellent properties of carbon materials, as well as more edge carbons and dangling bonds, and thus it has broad application prospects in such field as nanodevices, energy storage and sensing.
    • 本发明涉及一种碳纳米管及其制备方法。 根据本发明的碳纳米管由单层或多层同轴碳环组成,其中碳环的结构类似于由滚动的石墨片形成的闭环系统,其轴向尺寸和径向尺寸 的碳纳米尺寸是纳米级的,其轴向尺寸小于径向尺寸。 本发明还提供了一种制备上述碳纳米管的方法,包括在惰性气氛或还原气氛中煅烧通过插入长链烷基阴离子和碳源分子获得的层状双氢氧化物,在碳纳米管之间的限制区内生长碳纳米 在层内催化金属元素层,并通过溶解在酸中去除金属和金属氧化物以获得碳纳米。 通过使用该方法,可以根据其碳环的轴向尺寸,径向尺寸和层数有效地控制碳纳米化。 本发明提供的碳纳米管具有纳米环形结构和碳材料的优异性能,以及更多的边缘碳和悬挂键,因此在纳米器件,能量存储和感测领域具有广泛的应用前景 。
    • 7. 发明申请
    • CARBON NANORING AND METHOD FOR PREPARING THE SAME
    • 碳纳米管及其制备方法
    • US20130273294A1
    • 2013-10-17
    • US13994487
    • 2011-12-07
    • Wensheng YangJie SunXu ChenHaimei Liu
    • Wensheng YangJie SunXu ChenHaimei Liu
    • C01B31/02
    • C01B31/0293B82Y30/00B82Y40/00C01B31/0206C01B32/15Y10T428/21
    • The invention relates to a carbon nanoring and a method for preparing the same. The carbon nanoring according to the present invention is composed of monolayered or multilayered coaxial carbon rings, wherein the carbon ring has a structure similar to that of a closed ring system formed by graphite sheet being rolled, and each of an axial dimension and a radial dimension of the carbon nanoring is nanoscale with the axial dimension being smaller than the radial dimension. The invention further provides a method for preparing the above carbon nanoring including calcinating in an inert atmosphere or a reducing atmosphere a layered double hydroxides obtained by intercalating a long-chain alkyl anion and a carbon source molecule, growing a carbon nanoring within a confined region between layers under the catalysis of the metal element in layers, and removing the metal and the metal oxide by dissolving in an acid to obtain the carbon nanoring. By using this method, the carbon nanoring can be effectively controlled in terms of the axial dimension, the radial dimension, and the number of layers of the carbon ring thereof. The carbon nanoring provided by the present invention has the nano-ring shaped structure and the excellent properties of carbon materials, as well as more edge carbons and dangling bonds, and thus it has broad application prospects in such field as nanodevices, energy storage and sensing.
    • 本发明涉及一种碳纳米管及其制备方法。 根据本发明的碳纳米管由单层或多层同轴碳环组成,其中碳环的结构类似于由滚动的石墨片形成的闭环系统,其轴向尺寸和径向尺寸 的碳纳米尺寸是纳米级的,其轴向尺寸小于径向尺寸。 本发明还提供了一种制备上述碳纳米管的方法,包括在惰性气氛或还原气氛中煅烧通过嵌入长链烷基阴离子和碳源分子获得的层状双氢氧化物,在碳纳米管之间的限制区内生长碳纳米 在层内催化金属元素层,并通过溶解在酸中去除金属和金属氧化物以获得碳纳米。 通过使用该方法,可以根据其碳环的轴向尺寸,径向尺寸和层数有效地控制碳纳米化。 本发明提供的碳纳米管具有纳米环形结构和碳材料的优异性能,以及更多的边缘碳和悬挂键,因此在纳米器件,能量存储和感测领域具有广泛的应用前景 。