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385 条记录 (耗时 0.022 秒)

    Exponentially scaling switched capacitor
    3.
    发明授权
    Exponentially scaling switched capacitor 有权

    公开(公告)号：US09912320B2

    公开(公告)日：2018-03-06

    申请号：US15180442

    申请日：2016-06-13

    申请人： The Hong Kong University of Science and Technology

    发明人： Howard Cam Luong ,  Zhiqiang Huang

    IPC分类号： H03J3/18 ,  H03B5/12 ,  H03H7/00 ,  H03K3/36

    CPC分类号： H03J3/185 ,  H03H7/004 ,  H03H7/24 ,  H03K3/36 ,  H03L7/0991 ,  H03L2207/50

    摘要： An exponentially-scaling switched impedance circuit includes: two or more impedance scaling circuits, wherein each impedance scaling circuit comprises: an input port; an output port; and a switched impedance circuit connected in parallel to the output port. Each impedance scaling circuit is configured to provide an effective impedance at the input port corresponding to a scaled-down version of the exponentially-scaling switched impedance circuit. The two or more impedance scaling circuits are connected in a cascade such that an input of an impedance scaling circuit is connected to an output of a previous impedance scaling circuit and/or an output of the impedance scaling circuit is connected to an input of a next impedance scaling circuit.

    Resistor attenuator with switch distortion cancellation
    4.
    发明授权
    Resistor attenuator with switch distortion cancellation 有权

    公开(公告)号：US09813040B2

    公开(公告)日：2017-11-07

    申请号：US14857815

    申请日：2015-09-17

    申请人： Texas Instruments Incorporated

    发明人： Rajendrakumar Joish

    IPC分类号： H01P1/22 ,  H03H7/24 ,  H03F1/56 ,  H03F1/32 ,  H03F3/45

    CPC分类号： H03H7/24 ,  H01P1/22 ,  H03F1/3211 ,  H03F1/56 ,  H03F3/45 ,  H03F3/45475 ,  H03F2203/45151 ,  H03F2203/45594 ,  H03F2203/45614 ,  H03F2203/45616

    摘要： A programmable (multistep) resistor attenuator architecture (such as for input to a differential amplifier) provides cancellation for harmonic distortion currents. An attenuation node is coupled: (a) to an input node through R; (b) to a virtual ground through kR and a virtual ground switch Swf with on-resistance Rswf; and (c) to a differential ground through mR and a differential ground switch Swp with on-resistance Rswp. Swp can be sized relative to Swf such that a component Ipnf of Ipn through Rswp and mR to the attenuation node, and branching into kR and Rswf, matches (phase/magnitude), a harmonic current Ifn from the virtual ground through Rswf and kR to the attenuation node. Harmonic distortion cancelation at the virtual ground can be based on matching switches Swf and Swp and the resistors R, mR, kR, reducing sensitivity to PVT variations, input frequency and amplitude. The attenuator architecture is extendable to multistage configurations.

    Low phase shift, high frequency attenuator
    5.
    发明授权
    Low phase shift, high frequency attenuator 有权

    公开(公告)号：US09602091B1

    公开(公告)日：2017-03-21

    申请号：US14958809

    申请日：2015-12-03

    申请人： Peregrine Semiconductor Corporation

    发明人： Vikas Sharma

    IPC分类号： H03L5/00 ,  H03K5/08 ,  H03K17/687

    CPC分类号： H03H11/245 ,  H01P1/227 ,  H03H7/24 ,  H03H11/28 ,  H03K5/08 ,  H03K17/687

    摘要： A wideband RF attenuator circuit that has a reduced impact on the phase of an applied signal when switched between an attenuation state and a non-attenuating reference or bypass state. A low phase shift attenuation at high RF frequencies can be achieved by utilizing a switched signal path attenuator topology with multiple distributed transmission line elements per signal path to provide broadband operation, distribute parasitic influences, and improve isolation to achieve higher attenuation at higher frequencies while still maintaining low phase shift operational characteristics. In an alternative embodiment, extension to even higher frequencies can be achieved by utilizing a quarter-wave transmission line element at the signal interfaces of each signal path, thereby improving insertion loss and power handling.

    Attenuator and signal generator for stepwise attenuating a radio frequency signal
    6.
    发明申请
    Attenuator and signal generator for stepwise attenuating a radio frequency signal 有权
    衰减器和信号发生器，用于逐步衰减射频信号

    公开(公告)号：US20160344447A1

    公开(公告)日：2016-11-24

    申请号：US14714688

    申请日：2015-05-18

    申请人： Rohde & Schwarz GmbH & Co. KG

    发明人： Simon Schmid

    IPC分类号： H04B3/466 ,  H04L7/033

    CPC分类号： H04B3/466 ,  H03H7/24 ,  H03H7/25

    摘要： The invention relates to an attenuator for stepwise attenuating a radio frequency signal. The attenuator comprises a first attenuation module that is configured to stepwise attenuate a radio frequency signal within a first signal frequency range. The attenuator comprises a second attenuation module that is configured to stepwise attenuate a radio frequency signal with a second signal frequency range, wherein the second attenuation module is arranged in parallel to the first attenuation module. The attenuator further comprises a switching element, wherein the switching element switches either the first attenuation module or the second attenuation module to an output node of the attenuator.

    摘要翻译： 本发明涉及一种用于逐步衰减射频信号的衰减器。 衰减器包括第一衰减模块，其被配置为在第一信号频率范围内逐步衰减射频信号。 衰减器包括第二衰减模块，其被配置为逐步衰减具有第二信号频率范围的射频信号，其中第二衰减模块被布置成与第一衰减模块并联。 衰减器还包括开关元件，其中开关元件将第一衰减模块或第二衰减模块切换到衰减器的输出节点。

    Resistive divider circuit for a differential signal communications receiver
    8.
    发明授权
    Resistive divider circuit for a differential signal communications receiver 有权
    用于差分信号通信接收机的电阻分压电路

    公开(公告)号：US09413342B2

    公开(公告)日：2016-08-09

    申请号：US14484129

    申请日：2014-09-11

    申请人： NXP B.V.

    发明人： Arnoud van der Wel

    IPC分类号： H03K5/02 ,  H01C13/02 ,  H03H7/24 ,  H01L23/64 ,  H01L27/08 ,  H03H7/42

    CPC分类号： H03K5/02 ,  H01C13/02 ,  H01L23/647 ,  H01L27/0802 ,  H01L2924/0002 ,  H03H7/24 ,  H03H7/425 ,  H01L2924/00

    摘要： A resistive divider circuit for differential signaling is disclosed. The resistive divider includes a first branch and a second branch and each branch has an input, a first resistive component comprised of a number of unit resistors, a second resistive component comprised of a number of unit resistors, and an output connected between the first resistive component and the second resistive component, the output forming a differential mode output. The first resistive component and the second resistive component are comprised of an equal number of unit resistors.

    摘要翻译： 公开了用于差分信号的电阻分压电路。 电阻分压器包括第一分支和第二分支，每个分支具有输入，由多个单位电阻组成的第一电阻分量，由多个单位电阻组成的第二电阻分量，以及连接在第一电阻 分量和第二电阻分量，输出形成差模输出。 第一电阻分量和第二电阻分量由等量的单位电阻组成。

    ANALOG BASEBAND FILTERING APPARATUS OF MULTIMODE MULTIBAND WIRELESS TRANSCEIVER AND CONTROL METHOD THEREOF
    9.
    发明申请
    ANALOG BASEBAND FILTERING APPARATUS OF MULTIMODE MULTIBAND WIRELESS TRANSCEIVER AND CONTROL METHOD THEREOF 有权
    多模式无线收发器的模拟基带滤波器及其控制方法

    公开(公告)号：US20160173063A1

    公开(公告)日：2016-06-16

    申请号：US14908067

    申请日：2014-07-24

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Byungki HAN ,  Suseob AHN ,  Jongwoo LEE

    IPC分类号： H03H11/12 ,  H03H11/04

    CPC分类号： H03H11/12 ,  H03H7/24 ,  H03H11/0405 ,  H03H11/0455 ,  H03H11/1252 ,  H03H11/1291 ,  H03H2011/0494 ,  H03H2250/00 ,  H04L25/03

    摘要： A filtering apparatus and method of a multimode multiband transceiver is provided for filtering a signal carrying an analog baseband signal. A filtering apparatus of a multimode multiband radio transceiver of the present invention includes a filtering unit which filters Radio Frequency (RF) signals on one of at least one frequency bands, a switching unit which switches the signals among at least one filter block included in the filtering unit according to a selected communication mode, and a controller which selects the communication mode and controls the switching unit. The analog signal filtering apparatus and method of the present invention is advantageous in terms of providing a variable gain amplifier, filter circuit, and algorithm capable of fulfilling the gains and bandwidths required by the baseband receiver for all mobile communication standards complied by 2G, 3G, and 4G systems.

    摘要翻译： 提供了一种多模多频收发器的滤波装置和方法，用于对携带模拟基带信号的信号进行滤波。 本发明的多模多频带无线电收发器的滤波装置包括：滤波单元，其对至少一个频带中的一个频带上的射频（RF）信号进行滤波;切换单元，其在包括在所述至少一个频带中的至少一个滤波器块 过滤单元，以及选择通信模式并控制切换单元的控制器。 本发明的模拟信号滤波装置和方法在提供一种可变增益放大器，滤波器电路和算法方面是有利的，该可变增益放大器，滤波器电路和算法能够满足基带接收机对2G，3G所遵循的所有移动通信标准所需的增益和带宽， 和4G系统。

    Reflective Vector Modulators
    10.
    发明申请
    Reflective Vector Modulators 审中-公开
    反射矢量调制器

    公开(公告)号：US20160112032A1

    公开(公告)日：2016-04-21

    申请号：US14972099

    申请日：2015-12-17

    申请人： Liming Zhou

    发明人： Liming Zhou

    IPC分类号： H03H11/24 ,  G06K7/10

    CPC分类号： H03H11/245 ,  G01S5/0247 ,  G01S5/08 ,  G06K7/10237 ,  G06K7/10356 ,  G06K19/07749 ,  G06K19/07773 ,  H03F1/02 ,  H03F1/0211 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/105 ,  H03F2200/27 ,  H03F2200/321 ,  H03F2200/336 ,  H03F2200/414 ,  H03H7/18 ,  H03H7/24 ,  H03H7/255 ,  H03H7/383 ,  H03K19/0005 ,  H04W4/02

    摘要： Technologies for RFID positioning and tracking apparatus and methods are disclosed herein. The apparatus and methods disclose a radio-frequency identification positioning system that includes a radio-frequency identification reader and a phased-array antenna coupled to the radio-frequency identification reader. Techniques are applied to reduce in-reader and in-antenna signal leakages. Techniques are applied to position and track RFID tags. Circuits with leakage cancellation abilities are also disclosed. Reflective vector attenuators with tunable impedance load are also disclosed. Polarization adjustable antennas with matching circuits used in the RFID positioning system are also disclosed. Circuits to re-transmit a received signal at a higher amplitude to enhance radio link range are also disclosed. Techniques are applied to increase the level of scattered radio signals from RFID tags.

    摘要翻译： 本文公开了用于RFID定位和跟踪装置和方法的技术。 该装置和方法公开了一种射频识别定位系统，其包括射频识别读取器和耦合到射频识别读取器的相控阵天线。 应用技术来减少阅读器内和天线内的信号泄漏。 技术应用于定位和跟踪RFID标签。 还公开了具有泄漏消除能力的电路。 还公开了具有可调阻抗负载的反射矢量衰减器。 还公开了在RFID定位系统中使用的具有匹配电路的极化可调天线。 还公开了以更高幅度重新发送接收信号以增强无线电链路范围的电路。 应用技术来增加RFID标签散射无线电信号的水平。