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21.发明申请公开(公告)号：US20050227644A1
公开(公告)日：2005-10-13
申请号：US11087225
申请日：2005-03-23
CPC分类号： H03F1/0227 , H03F1/02 , H03F1/32 , H03F3/24 , H03F2200/102 , H03G3/004 , H04B1/0483 , H04B2001/045
摘要： An envelope tracking radio frequency (RF) power amplifier having an adaptive envelope signal processing circuit is disclosed. An RF input voltage is sampled by the adaptive envelope signal processing circuit which provides control signals to the power supply which supplies voltages to RF power devices in order to simultaneously satisfy two operating conditions: a) provide best possible efficiency of the power amplifier stages depending on the input signal characteristics and b) provide compensation for RF transistor AM-AM and AM-PM distortion compensation across the power range. In particular, the voltage control provides for constant power amplifier gain across the input signal dynamic range, thus minimizing power amplifier amplitude distortions and extending the useful power amplifier linear dynamic range up to saturation point. The power amplifier thus exhibits better linearity and efficiency than offered by conventional techniques and topologies.
摘要翻译： 公开了具有自适应包络信号处理电路的包络跟踪射频（RF）功率放大器。 RF输入电压由自适应包络信号处理电路采样，该电路向向RF功率器件提供电压的电源提供控制信号，以便同时满足两个工作条件：a）提供功率放大器级的最佳可能效率，这取决于 输入信号特性和b）在功率范围内为射频晶体管AM-AM和AM-PM失真补偿提供补偿。 特别地，电压控制在输入信号动态范围内提供恒定的功率放大器增益，从而最小化功率放大器幅度失真并将有用的功率放大器线性动态范围扩展到饱和点。 因此，功率放大器比常规技术和拓扑结构提供更好的线性度和效率。
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22.发明授权Systems and methods of dynamic bias switching for radio frequency power amplifiers 有权射频功率放大器的动态偏置切换系统和方法公开(公告)号：US06937094B2
公开(公告)日：2005-08-30
申请号：US10386013
申请日：2003-03-11
CPC分类号： H03F1/3229 , H03F1/0244 , H03F1/301 , H03G3/004
摘要： A dynamic bias switching circuit is provided that includes a switching unit for switching between a first signal level and a second signal level based on a signal envelope of an input signal to an amplifier.
摘要翻译： 提供了一种动态偏置开关电路，其包括用于基于输入信号到放大器的信号包络在第一信号电平和第二信号电平之间切换的开关单元。
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公开(公告)号：US20050110563A1
公开(公告)日：2005-05-26
申请号：US10723801
申请日：2003-11-25
申请人： Alex Rabinovich , Mark Gurvich , Jianqing He
发明人： Alex Rabinovich , Mark Gurvich , Jianqing He
CPC分类号： H03F1/3223
摘要： A feedforward amplifier. The present invention therefore provides a feedforward amplifier, comprising: a pilot reference generator that generates a pilot signal; a first carrier cancellation loop; a first error amplifier loop including a first error amplifier, wherein the pilot signal is utilized to provide gain stabilization in the first error amplifier a third loop; a second carrier cancellation loop that includes a first phase and amplitude adjuster in module and a second amplitude and phase adjuster disposed between module and module, wherein the pilot signal is utilized to control the adjustment of the second carrier cancellation loop.
摘要翻译： 前馈放大器 因此，本发明提供了一种前馈放大器，包括：导频参考发生器，其产生导频信号; 第一载波消除环路; 包括第一误差放大器的第一误差放大器环路，其中所述导频信号用于在所述第一误差放大器中提供第三环路中的增益稳定; 第二载波消除环路，其包括模块中的第一相位和幅度调节器以及设置在模块和模块之间的第二幅度和相位调整器，其中所述导频信号用于控制所述第二载波消除环路的调整。
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公开(公告)号：US06897724B2
公开(公告)日：2005-05-24
申请号：US10805666
申请日：2004-03-19
CPC分类号： H03F1/3229
摘要： A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.
摘要翻译： 组延时调整电路。 组延迟调整电路包括电子可调可变电容，以及与节点处的电可变电容并联耦合的电可变虚拟电感器。
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公开(公告)号：US06856215B2
公开(公告)日：2005-02-15
申请号：US10151835
申请日：2002-05-20
CPC分类号： H03F1/3229
摘要： A group delay adjusting circuit. The group delay adjusting circuit comprises an electronically adjustable variable capacitance, and an electronically variable virtual inductor coupled in parallel to the electronically variable capacitance at a node.
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