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    Amplifiers with noise splitting
    43.
    发明授权
    Amplifiers with noise splitting 有权
    具有噪声分离的放大器

    公开(公告)号：US09543903B2

    公开(公告)日：2017-01-10

    申请号：US13656904

    申请日：2012-10-22

    Applicant: QUALCOMM Incorporated

    Inventor： Rui Xu ,  Li-Chung Chang

    IPC: H04B1/06 ,  H03F1/22 ,  H03F1/26 ,  H03F3/19 ,  H03F3/21 ,  H03F3/24 ,  H03F3/68 ,  H03F3/72

    CPC classification number: H03F1/26 ,  H03F1/223 ,  H03F3/19 ,  H03F3/195 ,  H03F3/211 ,  H03F3/245 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/421 ,  H03F2200/451 ,  H03F2200/492 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2203/21145

    Abstract: Amplifiers with noise splitting to improve noise figure are disclosed. In an exemplary design, an apparatus (e.g., a wireless device, an integrated circuit, etc.) includes a plurality of amplifier circuits and at least one interconnection circuit. The amplifier circuits receive an input radio frequency (RF) signal. The interconnection circuit(s) are coupled between the plurality of amplifier circuits. Each interconnection circuit is closed to short the outputs or internal nodes of two amplifier circuits coupled to that interconnection circuit. The plurality of amplifier circuits may include a plurality of gain circuits coupled to a plurality of current buffers, one gain circuit and one current buffer for each amplifier circuit. Each amplifier circuit provides an output current, which may include a portion of the current from each of the plurality of gain circuits when the plurality of amplifier circuits are enabled.

    Abstract translation: 公开了具有噪声分离以改善噪声系数的放大器。 在示例性设计中，装置（例如，无线装置，集成电路等）包括多个放大器电路和至少一个互连电路。 放大器电路接收输入射频（RF）信号。 互连电路耦合在多个放大器电路之间。 关闭每个互连电路以使耦合到该互连电路的两个放大器电路的输出或内部节点短路。 多个放大器电路可以包括耦合到多个电流缓冲器的多个增益电路，每个放大器电路的一个增益电路和一个电流缓冲器。 每个放大器电路提供输出电流，当多个放大器电路被使能时，其可以包括来自多个增益电路中的每一个的电流的一部分。

    Routing and shielding of signal lines to improve isolation
    46.
    发明授权
    Routing and shielding of signal lines to improve isolation 有权
    信号线的路由和屏蔽，以提高隔离度

    公开(公告)号：US09277641B2

    公开(公告)日：2016-03-01

    申请号：US13857022

    申请日：2013-04-04

    Applicant: QUALCOMM Incorporated

    Inventor： Ahmed Abdel Monem Youssef ,  Li-Chung Chang ,  Ehab Ahmed Sobhy Abdel Ghany ,  Rui Xu ,  Wingching Vincent Leung ,  Allen He

    IPC: H05K1/02 ,  H04B3/02 ,  H04B1/44 ,  H04B7/04 ,  H04B1/00

    CPC classification number: H05K1/0228 ,  H04B1/005 ,  H04B1/44 ,  H04B3/02 ,  H04B7/04 ,  H05K1/0219 ,  H05K2201/09245 ,  Y10T307/74

    Abstract: Techniques for routing and shielding signal lines to improve isolation between the signal lines are disclosed. In an exemplary design, an apparatus includes first, second, and third signal lines and a switch. The first, second, and third signal lines are configurable to carry first, second, and third signals, respectively. The switch is coupled between the second signal line and AC ground and is closed when the second signal line is not carrying the second signal. The second signal line isolates the first and third signal lines when the switch is closed. Adjacent signal lines are not active at the same time. A signal line may include positive and negative signal lines, which may have at least one cross over in order to cancel coupling between the positive and negative signal lines.

    Abstract translation: 公开了用于路由和屏蔽信号线以改善信号线之间的隔离的技术。 在示例性设计中，装置包括第一，第二和第三信号线和开关。 第一，第二和第三信号线可配置为分别承载第一，第二和第三信号。 开关耦合在第二信号线和AC地之间，并且当第二信号线不携带第二信号时闭合。 当开关闭合时，第二信号线隔离第一和第三信号线。 相邻信号线同时不起作用。 信号线可以包括正和负信号线，其可以具有至少一个交叉以消除正和负信号线之间的耦合。

    TRANSFORMER WITH INTEGRATED NOTCH FILTER
    48.
    发明申请
    TRANSFORMER WITH INTEGRATED NOTCH FILTER 有权
    变压器带有集成插孔滤波器

    公开(公告)号：US20140347142A1

    公开(公告)日：2014-11-27

    申请号：US13901335

    申请日：2013-05-23

    Applicant: QUALCOMM Incorporated

    Inventor： Li-Chung Chang ,  Ehab A. Abdel Ghany ,  Ahmed A. Youssef

    IPC: H03H7/42 ,  H03H7/01

    CPC classification number: H04K3/228 ,  H03H7/0115 ,  H03H7/0184 ,  H03H7/07 ,  H03H7/1775 ,  H03H2007/013 ,  H03H2210/01 ,  H04B1/1036

    Abstract: Techniques for providing low-cost and effective jammer rejection for a radio receiver. In an aspect, a notch filter is provided between a transformer and a differential mixer in the receiver. The notch frequency of the notch filter may be selected to correspond to an expected jammer frequency to effectively attenuate the jammer signal prior to down-conversion mixing by the mixer. The notch filter may be implemented using various techniques, e.g., an L-C combination having adjustable capacitance, and/or elliptic or Chebyshev filters.

    Abstract translation: 为无线电接收机提供低成本和有效干扰抑制的技术。 在一方面，陷波滤波器设置在接收机中的变压器和差分混频器之间。 可以选择陷波滤波器的陷波频率以对应于预期的干扰频率，以在混频器进行下变频混频之前有效地衰减干扰信号。 陷波滤波器可以使用各种技术来实现，例如具有可调电容的L-C组合和/或椭圆形或切比雪夫滤波器。

    AMPLIFIERS WITH INDUCTIVE DEGENERATION AND CONFIGURABLE GAIN AND INPUT MATCHING
    49.
    发明申请
    AMPLIFIERS WITH INDUCTIVE DEGENERATION AND CONFIGURABLE GAIN AND INPUT MATCHING 有权
    具有电感衰减和可配置增益和输入匹配的放大器

    公开(公告)号：US20140253242A1

    公开(公告)日：2014-09-11

    申请号：US13794110

    申请日：2013-03-11

    Applicant: QUALCOMM INCORPORATED

    Inventor： Ahmed A. Youssef ,  Sherif Abdelhalem ,  Ehab A. Abdel Ghany ,  Li-Chung Chang

    IPC: H03G3/30

    CPC classification number: H03F1/223 ,  H03F1/08 ,  H03F1/56 ,  H03F3/189 ,  H03F3/45179 ,  H03F2200/492 ,  H03G1/0023

    Abstract: Amplifiers with inductive degeneration and configurable gain and input matching are disclosed. In an exemplary design, an apparatus includes a gain transistor, an inductor, and an input matching circuit for an amplifier. The gain transistor has a variable gain determined based on its bias current. The inductor is coupled between the gain transistor and circuit ground. The input matching circuit is selectively coupled to the gain transistor based on the variable gain of the gain transistor. For example, the input matching circuit may be coupled to the gain transistor in a low-gain mode and decoupled from the gain transistor in the high-gain mode. In an exemplary design, the input matching circuit includes a resistor, a capacitor, and a second transistor coupled in series. The resistor is used for input matching of the amplifier. The second transistor couples or decouples the resistor to or from the gain transistor.

    Abstract translation: 公开了具有感应退化和可配置增益和输入匹配的放大器。 在示例性设计中，装置包括用于放大器的增益晶体管，电感器和输入匹配电路。 增益晶体管具有基于其偏置电流确定的可变增益。 电感器耦合在增益晶体管和电路接地之间。 基于增益晶体管的可变增益，输入匹配电路选择性地耦合到增益晶体管。 例如，输入匹配电路可以以低增益模式耦合到增益晶体管，并在高增益模式中与增益晶体管去耦。 在示例性设计中，输入匹配电路包括串联耦合的电阻器，电容器和第二晶体管。 该电阻用于放大器的输入匹配。 第二个晶体管将电阻器耦合或去耦合增益晶体管。

    RECEIVER CALIBRATION WITH LO SIGNAL FROM INACTIVE RECEIVER
    50.
    发明申请
    RECEIVER CALIBRATION WITH LO SIGNAL FROM INACTIVE RECEIVER 有权
    接收器使用无信号接收器的信号进行校准

    公开(公告)号：US20140171001A1

    公开(公告)日：2014-06-19

    申请号：US13777691

    申请日：2013-02-26

    Applicant: QUALCOMM INCORPORATED

    Inventor： Udara C. Fernando ,  Li-Chung Chang ,  Vijay K. Chellappa ,  Frederic Bossu ,  Ketan Humnabadkar ,  Gurkanwal Singh Sahota

    IPC: H04B17/00

    CPC classification number: H04B17/21

    Abstract: Techniques for calibrating a receiver based on a local oscillator (LO) signal from another receiver are disclosed. In an exemplary design, an apparatus (e.g., a wireless device or an integrated circuit) includes first and second local oscillator (LO) generators. The first LO generator generates a first LO signal used by a first receiver for frequency downconversion. The second LO generator generates a second LO signal used by a second receiver for frequency downconversion in a first operating mode. The second LO signal is used to generate a test signal for the first receiver in a second operating mode. The second LO signal may be provided as the test signal or may be amplitude modulated with a modulating signal to generate the test signal. The test signal may be used to calibrate residual sideband (RSB), second order input intercept point (IIP2), receive path gain, etc.

    Abstract translation: 公开了基于来自另一接收机的本地振荡器（LO）信号来校准接收机的技术。 在示例性设计中，装置（例如，无线装置或集成电路）包括第一和第二本地振荡器（LO）发生器。 第一LO发生器产生用于频率下变频的第一接收机使用的第一LO信号。 第二LO发生器在第一操作模式中产生由第二接收机用于频率下变频的第二LO信号。 第二LO信号用于在第二操作模式中为第一接收机生成测试信号。 第二LO信号可以作为测试信号提供，或者可以用调制信号进行幅度调制以产生测试信号。 测试信号可用于校准残余边带（RSB），二阶输入截点（IIP2），接收路径增益等。

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