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    SYSTEM AND METHOD OF PREBIAS FOR RAPID POWER AMPLIFIER RESPONSE CORRECTION
    1.
    发明申请
    SYSTEM AND METHOD OF PREBIAS FOR RAPID POWER AMPLIFIER RESPONSE CORRECTION 有权
    用于快速放大器响应校正的系统和方法

    公开(公告)号：US20130034144A1

    公开(公告)日：2013-02-07

    申请号：US13536009

    申请日：2012-06-28

    申请人： Mark Doherty ,  Lui (Ray) Lam ,  Chun-Wen Paul Huang

    发明人： Mark Doherty ,  Lui (Ray) Lam ,  Chun-Wen Paul Huang

    IPC分类号： H04L25/49 ,  H04L27/01

    CPC分类号： H03G3/3047 ,  H03F1/302 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/18 ,  H03F2200/408 ,  H03F2200/447

    摘要： A system and method are provided for reducing dynamic EVM of an integrated circuit power amplifier (PA) used for RF communication. In a multistage PA, the largest amplification stage is biased with a high amplitude current pulse upon receipt of a Tx enable, before receipt of the RF signal data burst. The high amplitude current pulse causes a large portion of the total ICQ budget of the multistage PA to pass through the largest amplification stage causing the entire integrated circuit to rapidly approach steady-state operating conditions. A smoothing bias current is applied to the largest amplification stage after the pulse decays to compensate for transient bias current levels while standard bias circuitry is still approaching steady-state temperature.

    摘要翻译： 提供了用于减少用于RF通信的集成电路功率放大器（PA）的动态EVM的系统和方法。 在多级PA中，在接收到RF信号数据脉冲串之前，在接收到Tx使能时，最大的放大级被高振幅电流脉冲偏置。 高幅度电流脉冲导致多级PA的总ICQ预算的大部分通过最大的放大级，导致整个集成电路快速接近稳态工作条件。 在脉冲衰减后，平滑偏置电流被施加到最大放大级，以补偿瞬态偏置电流电平，而标准偏置电路仍然接近稳态温度。

    System and Method of Prebias for Rapid Power Amplifier Response Correction
    2.
    发明申请
    System and Method of Prebias for Rapid Power Amplifier Response Correction 有权
    用于快速功率放大器响应校正的Prebias系统和方法

    公开(公告)号：US20110128078A1

    公开(公告)日：2011-06-02

    申请号：US12629168

    申请日：2009-12-02

    申请人： Mark Doherty ,  Lui (Ray) Lam ,  Chun-Wen Paul Huang

    发明人： Mark Doherty ,  Lui (Ray) Lam ,  Chun-Wen Paul Huang

    IPC分类号： H03G3/30

    CPC分类号： H03G3/3047 ,  H03F1/302 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/18 ,  H03F2200/408 ,  H03F2200/447

    摘要： A system and method are provided for reducing dynamic EVM of an integrated circuit power amplifier (PA) used for RF communication. In a multistage PA, the largest amplification stage is biased with a high amplitude current pulse upon receipt of a Tx enable, before receipt of the RF signal data burst. The high amplitude current pulse causes a large portion of the total ICQ budget of the multistage PA to pass through the largest amplification stage causing the entire integrated circuit to rapidly approach steady-state operating conditions. A smoothing bias current is applied to the largest amplification stage after the pulse decays to compensate for transient bias current levels while standard bias circuitry is still approaching steady-state temperature.

    摘要翻译： 提供了用于减少用于RF通信的集成电路功率放大器（PA）的动态EVM的系统和方法。 在多级PA中，在接收到RF信号数据脉冲串之前，在接收到Tx使能时，最大的放大级被高振幅电流脉冲偏置。 高幅度电流脉冲导致多级PA的总ICQ预算的大部分通过最大的放大级，导致整个集成电路快速接近稳态工作条件。 在脉冲衰减后，平滑偏置电流被施加到最大放大级，以补偿瞬态偏置电流电平，而标准偏置电路仍然接近稳态温度。

    CDMA power amplifier design for low and high power modes
    9.
    发明授权
    CDMA power amplifier design for low and high power modes 有权
    CDMA功率放大器设计用于低功耗和高功率模式

    公开(公告)号：US07202736B1

    公开(公告)日：2007-04-10

    申请号：US10807764

    申请日：2004-03-23

    申请人： Gee Samuel Dow ,  Jianwen Bao ,  Chun-Wen Paul Huang

    发明人： Gee Samuel Dow ,  Jianwen Bao ,  Chun-Wen Paul Huang

    IPC分类号： H03G3/20 ,  H03F1/14

    CPC分类号： H03F1/30 ,  H03F1/14 ,  H03F1/3241 ,  H03F1/56 ,  H03F3/189 ,  H03F3/191 ,  H03F3/60 ,  H03F2200/318 ,  H03F2200/411 ,  H03F2200/75

    摘要： An amplifier circuit responsive to a power mode signal improves efficiency at low power levels without compromising efficiency at high power levels. At low power levels, high impedance is presented with suitable adjustment in the phase of the signal. Also, providing for predistortion linearization improves high power efficiency and switching the predistortion linearizer OFF at low power levels contributes little more than a small insertion loss. The power amplifier also uses a bias circuit incorporating a dual harmonic resonance filter to provide high impedance at a fundamental frequency and low impedance at a second harmonic. These properties are of particularly advantageous since amplifiers in cell-phones are used in low power modes most of the time although they are designed to be most efficient at primarily the highest power levels.

    摘要翻译： 响应于功率模式信号的放大器电路在低功率水平下提高效率，而不会在高功率水平下降低效率。 在低功率电平下，在信号的相位中适当调整高阻抗。 此外，提供预失真线性化提高了高功率效率，并且在低功率电平下切换预失真线性化器关闭仅仅贡献小于小的插入损耗。 功率放大器还使用包含双谐波谐振滤波器的偏置电路，以在基频处提供高阻抗，在二次谐波下提供低阻抗。 这些特性是特别有利的，因为手机中的放大器大部分时间都以低功率模式使用，尽管它们被设计为在主要最高功率水平下是最有效的。

    Switching Circuit
    10.
    发明申请
    Switching Circuit 有权
    开关电路

    公开(公告)号：US20100327948A1

    公开(公告)日：2010-12-30

    申请号：US12493437

    申请日：2009-06-29

    申请人： John Nisbet ,  Michael McPartlin ,  Chun-Wen Paul Huang

    发明人： John Nisbet ,  Michael McPartlin ,  Chun-Wen Paul Huang

    IPC分类号： H03K17/687

    CPC分类号： H04B1/44 ,  H03K17/687 ,  H03K2217/0036

    摘要： A method for controlling a switch based on transistors is disclosed. A switching circuit for switching a signal from an input port to an output port thereof is provided. A shunting circuit for switchably shunting the signal from the input port to ground is also provided. A control signal is generated for biasing a control port of the shunting circuit and an approximately complimentary control signal is generated for biasing of the switching circuit to either shunt a signal received at the input port or to switch the signal to the output port. A further bias signal for biasing a port within the switching circuit along the signal path between the input port and the output port is also provided.

    摘要翻译： 公开了一种用于控制基于晶体管的开关的方法。 提供了用于将信号从输入端口切换到其输出端口的开关电路。 还提供了用于将信号从输入端口切换到地的分流电路。 产生用于偏置分流电路的控制端口的控制信号，并且产生大约互补的控制信号以用于偏置开关电路以分流在输入端口接收的信号或将信号切换到输出端口。 还提供了用于沿着输入端口和输出端口之间的信号路径偏置开关电路内的端口的另外的偏置信号。