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    DYNAMICALLY VARYING LINEARITY SYSTEM FOR AN RF FRONT-END OF A COMMUNICATION DEVICE
    41.
    发明申请
    DYNAMICALLY VARYING LINEARITY SYSTEM FOR AN RF FRONT-END OF A COMMUNICATION DEVICE 审中-公开
    用于通信设备的RF前端的动态变化的线性系统

    公开(公告)号：WO2002076057A1

    公开(公告)日：2002-09-26

    申请号：PCT/US2002/008406

    申请日：2002-03-18

    Applicant: CONEXANT SYSTEMS, INC.

    Inventor： RAMACHANDRAN, Balasubramanian

    IPC: H04L27/30

    CPC classification number: H04W52/267 ,  H03G3/004 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/307 ,  H03G2201/40 ,  H03G2201/508 ,  H04B1/109 ,  H04L1/0001 ,  H04W52/08 ,  H04W52/38

    Abstract: A dynamically varying linearity system "DVLS" (102) capable of varying the linearity of a radio frequency (RF) front-end (112) of a communication device (100) responsive to receiving a condition signal indicating a desired mode of operation of a transmitter (112). The DVLS may include a condition signal indicative of the desired mode of operation and a controller (110) that adjusts the linearity of the transmitter responsive to the condition signal. The condition signal may be responsive to a user interface (106). The controller, responsive to the condition signal, may dynamically adjust the operating current of the transmitter.

    Abstract translation: 一种动态变化的线性系统“DVLS”（102），其能够响应于接收到指示期望的操作模式的条件信号而改变通信设备（100）的射频（RF）前端（112）的线性度 发射机（112）。 DVLS可以包括指示期望的操作模式的条件信号和响应于条件信号来调整发射机的线性度的控制器（110）。 条件信号可以响应于用户界面（106）。 控制器响应于条件信号，可以动态地调整发射机的工作电流。

    System for dynamic control of automatic gain control-take-over-point and method of operation
    46.
    发明公开
    System for dynamic control of automatic gain control-take-over-point and method of operation 有权
    系统，用于自动增益控制的接管点的动态控制和运行的程序

    公开(公告)号：EP1679792A2

    公开(公告)日：2006-07-12

    申请号：EP05251659.8

    申请日：2005-03-18

    Applicant: Microtune (Texas) L.P.

    Inventor： Hennig, Andreas G.

    IPC: H03G3/30

    CPC classification number: H03G3/3068 ,  H03G2201/103 ,  H03G2201/204 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/706

    Abstract: A receiver for processing a signal comprises a first amplifier circuit and a second amplifier circuit. The first amplifier circuit is operated in association with a first gain profile. The second amplifier circuit is operated in association with a second gain profile. The receiver further comprises a gain control circuit that determines a quality indicator associated with a modulated signal. The gain control circuit adjusts the first gain profile and the second gain profile based at least in part upon the determined quality indicator.

    Abstract translation: 一种用于处理信号接收器包括一个第一放大电路和第二放大电路。 第一放大器电路与第一增益曲线的关联操作。 第二放大器电路在与第二增益分布的关联操作。 该接收机还包括一个增益控制电路做bestimmt与调制信号相关联的质量指示器。 增益控制电路bestimmt第一增益曲线以及根据确定性开采质量指示符至少部分地基于所述第二增益轮廓。

    Linear and non-linear dual mode transmitter
    48.
    发明公开
    Linear and non-linear dual mode transmitter 审中-公开
    Lineeer und Nichtlinearer Sender mit zwei Betriebsarten

    公开(公告)号：EP1705800A2

    公开(公告)日：2006-09-27

    申请号：EP05026024.9

    申请日：2005-11-29

    Applicant: Broadcom Corporation

    Inventor： Pan, Meng-An

    IPC: H04B1/04 ,  H03F1/32

    CPC classification number: H04B1/0003 ,  H03F1/0261 ,  H03F3/45188 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/307 ,  H03G2201/40 ,  H04B1/0475

    Abstract: A transmitter includes a dual mode modulator and an amplifier coupled to the dual mode modulator. The dual mode modulator implements a linear modulation scheme during a first mode of the modulator to produce a variable envelope modulated signal. The dual mode modulator implements a non-linear modulation scheme during a second mode of the modulator to produce a constant envelope modulated signal. The amplifier is biased as a linear amplifier during the first mode of the modulator and is biased as a non-linear amplifier during the second mode of the modulator. A feed-forward connection between the dual mode modulator and the amplifier is used to indicate a change in modulation mode and to adjust the bias of the amplifier. A power of the constant envelope modulated signal is increased such that an operating point of the amplifier remains substantially constant during the first and second modes of the modulator.

    Abstract translation: 发射机包括耦合到双模调制器的双模调制器和放大器。 双模式调制器在调制器的第一模式期间实现线性调制方案，以产生可变包络调制信号。 双模调制器在调制器的第二模式期间实现非线性调制方案，以产生恒定的包络调制信号。 放大器在调制器的第一模式期间被偏置为线性放大器，并且在调制器的第二模式期间被偏置为非线性放大器。 双模式调制器和放大器之间的前馈连接用于指示调制模式的变化并调整放大器的偏置。 恒定包络调制信号的功率增加，使得放大器的工作点在调制器的第一和第二模式期间保持基本恒定。

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