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    LOW-POWER WIRELESS DIVERSITY RECEIVER WITH MULTIPLE RECEIVE PATHS
    1.
    发明申请
    LOW-POWER WIRELESS DIVERSITY RECEIVER WITH MULTIPLE RECEIVE PATHS 审中-公开
    低功率无线多路接收器，带有多个接收模块

    公开(公告)号：WO2005064816A1

    公开(公告)日：2005-07-14

    申请号：PCT/US2004/042783

    申请日：2004-12-17

    Applicant: QUALCOMM Incorporated ,  PERSICO, Charles J. ,  GARD, Kevin ,  SAHOTA, Gurkanwal, Kamal ,  MIYAZAKI, Shinichi ,  CICCARELLI, Steven C.

    Inventor： PERSICO, Charles J. ,  GARD, Kevin ,  SAHOTA, Gurkanwal, Kamal ,  MIYAZAKI, Shinichi ,  CICCARELLI, Steven C.

    IPC: H04B7/08

    CPC classification number: H04K3/224 ,  H04B1/109 ,  H04B7/082

    Abstract: A low-power diversity receiver includes at least two receive paths, each of which is designated as a primary or secondary receive path. A primary receive path is compliant with system requirements (e.g., IS-98D requirements). A secondary receive path is not fully compliant with the system requirements and is designed for lower power, less area, and lower cost than the primary receive path. For a multi-antenna receiver, the two receive paths may be used to simultaneously process two received signals from two antennas. For a single-antenna receiver, either the primary or secondary receive path is selected, e.g., depending on whether or not large amplitude "jammers" are detected, to process a single input signal from one antenna. The receiver may include additional receive paths for additional frequency bands and/or GPS.

    Abstract translation: 低功率分集接收器包括至少两个接收路径，每个接收路径被指定为主要或次要接收路径。 主要接收路径符合系统要求（例如，IS-98D要求）。 辅助接收路径不完全符合系统要求，并且设计用于比主接收路径更低的功率，更少的面积和更低的成本。 对于多天线接收机，两个接收路径可以用于同时处理来自两个天线的两个接收信号。 对于单天线接收机，例如，取决于是否检测到大的振幅“干扰”，选择主要或次要接收路径来处理来自一个天线的单个输入信号。 接收机可以包括用于附加频带和/或GPS的附加接收路径。

    DIRECT CONVERSION WITH VARIABLE AMPLITUDE LO SIGNALS
    2.
    发明申请
    DIRECT CONVERSION WITH VARIABLE AMPLITUDE LO SIGNALS 审中-公开
    具有可变振幅信号的直接转换

    公开(公告)号：WO2004047324A1

    公开(公告)日：2004-06-03

    申请号：PCT/US2003/036549

    申请日：2003-11-14

    Applicant: QUALCOMM INCORPORATED

    Inventor： GARD, Kevin ,  SEGORIA, Anthony ,  SAHOTA, Gurkanwal (Kamal) ,  PERSICO, Charles

    IPC: H04B1/30

    CPC classification number: H04B1/30

    Abstract: Techniques to reduce LO leakage by controlling the amplitude of LO signal based on the level of output signal after the frequency conversion process. An LO generator receives a VCO signal and generates an LO signal having a variable amplitude and a frequency that is related to the frequency of the VCO signal. A variable gain amplifier receives a control signal and adjusts the amplitude of the LO signal based on the control signal. The variable amplitude LO signal is used for frequency upconversion (e.g., direction upconversion) of an input signal (e.g., at baseband) to obtain an output signal (e.g., at RF). The relationship between LO signal amplitude and output signal level may be defined by a particular transfer function. In general, the LO signal is set higher for higher output signal level and is reduced proportionally for lower output signal level.

    Abstract translation: 通过基于变频处理后的输出信号电平控制LO信号的振幅来减少LO泄漏的技术。 LO发生器接收VCO信号并产生具有与VCO信号的频率相关的可变幅度和频率的LO信号。 可变增益放大器基于控制信号接收控制信号并调节LO信号的振幅。 可变幅度LO信号用于输入信号（例如，在基带处）的上变频（例如，上变频），以获得输出信号（例如，在RF）。 LO信号幅度和输出信号电平之间的关系可以由特定的传递函数定义。 通常，对于较高的输出信号电平，LO信号被设置得较高，并且对于较低的输出信号电平而言成比例地减小。

    CONTINUOUSLY VARIABLE GAIN RADIO FREQUENCY DRIVER AMPLIFIER HAVING LINEAR IN DECIBEL GAIN CONTROL CHARACTERISTICS
    3.
    发明申请
    CONTINUOUSLY VARIABLE GAIN RADIO FREQUENCY DRIVER AMPLIFIER HAVING LINEAR IN DECIBEL GAIN CONTROL CHARACTERISTICS 审中-公开
    具有线性差分增益控制特性的连续可变增益射频驱动放大器

    公开(公告)号：WO2004045226A2

    公开(公告)日：2004-05-27

    申请号：PCT/US2003/036231

    申请日：2003-11-12

    Applicant: QUALCOMM INCORPORATED

    Inventor： BARNETT, Kenneth ,  WALKER, Brett C. ,  GARD, Kevin

    IPC: H04Q7/00

    CPC classification number: H04B5/00 ,  H03F1/301 ,  H03G1/04 ,  H03G3/3036 ,  H03G3/3042 ,  H03G7/001

    Abstract: A radio frequency (RF) driver amplifier system and method that provides linear in decibel gain control is provided. The RF driver amplifier system comprises a linear transconductor receiving an input voltage and providing a controlled current based on input voltage received, temperature compensation circuitry for varying current from the linear transconductor according to absolute temperature, an exponential current controller receiving current varied according to temperature and providing an exponential current in response, and an inductive degeneration compensator receiving exponential current and providing a control current to driver amplifier circuitry , thereby compensating for inductive degeneration due to at least one inductor in the driver amplifier circuitry . Control current passes from the inductive degeneration compensator to the driver amplifier circuitry . Output gain from the driver amplifier circuitry varies linearly in decibels with respect to the input voltage.

    Abstract translation: 提供了一种提供线性分贝增益控制的射频（RF）驱动放大器系统和方法。 该RF驱动放大器系统包括接收输入电压并基于接收到的输入电压提供受控电流的线性跨导器，用于根据绝对温度改变来自线性跨导器的电流的温度补偿电路，接收根据温度变化的电流的指数电流控制器和 提供响应的指数电流，以及接收指数电流并向驱动器放大器电路提供控制电流从而补偿由于驱动器放大器电路中的至少一个电感器引起的电感负反馈的电感负反馈补偿器。 控制电流从感性负反馈补偿器传递到驱动器放大器电路。 来自驱动器放大器电路的输出增益相对于输入电压以分贝线性变化。

    QUADRATURE FREQUENCY CONVERTER
    5.
    发明公开
    QUADRATURE FREQUENCY CONVERTER 有权
    磨边变频装置

    公开(公告)号：EP1362412A2

    公开(公告)日：2003-11-19

    申请号：EP01981455.7

    申请日：2001-10-09

    Applicant: QUALCOMM INCORPORATED

    Inventor： SAHOTA, Gurkanwal, S. ,  GARD, Kevin

    IPC: H03C1/00

    CPC classification number: H03B21/01 ,  H03D7/165

    Abstract: A signal generator includes first and second mixers, first and second phase shift networks, and a summer. The first and second mixers respectively receive and mix a quadrature and an inphase sinusoid at a first frequency with a second input sinusoid at a second frequency. The first and second phase shift networks respectively couple to the first and second mixers, receive the outputs from the first and second mixers, and generate first and second phase shift networks respectively couple to the first and second mixers, receive the outputs from the first and second mixers, and generate first and second phase shifted signals. The summer couples to the first and second phase shift networks and receives ans sums the first and second phase shifted signals to generate a first output sinusoid. A second summer may be coupled to the first and second phase shift networks to receive and sum third and fourth phase shifted signals (generated by the first and second phase shift networks, respectively) to generate a second output sinusoid. The first and second output sinusoids are in quadrature. A third phase shift network may be adapted to receive a first input sinusoidal at the first frequency and generate the inphase and quadrature sinusoids.

    DIRECT CONVERSION WITH VARIABLE AMPLITUDE LO SIGNALS
    10.
    发明公开
    DIRECT CONVERSION WITH VARIABLE AMPLITUDE LO SIGNALS 有权
    具有可变振幅LO信号直接转换

    公开(公告)号：EP1576738A1

    公开(公告)日：2005-09-21

    申请号：EP03781962.0

    申请日：2003-11-14

    Applicant: QUALCOMM INCORPORATED

    Inventor： GARD, Kevin ,  SEGORIA, Anthony ,  SAHOTA, Gurkanwal (Kamal) ,  PERSICO, Charles

    IPC: H04B1/30

    CPC classification number: H04B1/30

    Abstract: Techniques to reduce LO leakage by controlling the amplitude of LO signal based on the level of output signal after the frequency conversion process. An LO generator receives a VCO signal and generates an LO signal having a variable amplitude and a frequency that is related to the frequency of the VCO signal. A variable gain amplifier receives a control signal and adjusts the amplitude of the LO signal based on the control signal. The variable amplitude LO signal is used for frequency upconversion (e.g., direction upconversion) of an input signal (e.g., at baseband) to obtain an output signal (e.g., at RF). The relationship between LO signal amplitude and output signal level may be defined by a particular transfer function. In general, the LO signal is set higher for higher output signal level and is reduced proportionally for lower output signal level.

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