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公开(公告)号：US07049907B2
公开(公告)日：2006-05-23
申请号：US10805634
申请日：2004-03-19
IPC分类号： H01P9/00
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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公开(公告)号：US07173484B2
公开(公告)日：2007-02-06
申请号：US10723802
申请日：2003-11-25
申请人： Alex Rabinovich , Mark Gurvich , Jianqing He
发明人： Alex Rabinovich , Mark Gurvich , Jianqing He
IPC分类号： H03F3/66
CPC分类号： H03F1/32 , H03F1/3223 , H03F1/3229 , H03F1/3235 , H03F3/24 , H04B2001/0441
摘要： A dual loop feedforward power amplifier. A dual loop feedforward power amplifier, comprising an input that provides a multicarrier signal; a first feedforward power amplifier; and a second feedforward power amplifier, wherein the first feedforward power amplifier serves as a main amplifier gain block in the second feedforward power amplifier, wherein the first feedforward power amplifier comprises a carrier cancellation loop and a first error amplifier loop, and wherein the second feedforward power amplifier comprises a third loop and a fourth loop that cancel small signal distortions that are not reduced by the first feedforward amplifier.
摘要翻译： 双环前馈功率放大器。 一种双环前馈功率放大器，包括提供多载波信号的输入; 第一前馈功率放大器; 以及第二前馈功率放大器，其中所述第一前馈功率放大器用作所述第二前馈功率放大器中的主放大器增益块，其中所述第一前馈功率放大器包括载波消除环路和第一误差放大器环路，并且其中所述第二前馈功率放大器 功率放大器包括消除由第一前馈放大器未减小的小信号失真的第三环路和第四环路。
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公开(公告)号：US20050110567A1
公开(公告)日：2005-05-26
申请号：US10723094
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： H03F1/3235 , H03F1/32
摘要： A system and method of pilot tone reuse. The present invention therefore provides a feedforward amplifier, comprising: an input that accepts a radio frequency signal having multiple carriers; a first control loop including a main amplifier block and a detector, wherein the first control loop generates a first carrier cancelled signal; a second control loop including a pilot generator, I/Q demodulator, vector modulator and first error amplifier block, wherein the pilot generator, I/Q demodulator and first error amplifier block amplify the first carrier cancelled signal and generates a pilot signal; a third control loop comprising a vector modulator and a second carrier cancellation detector; and a fourth control loop comprising of vector modulator, a second error amplifier block, and a pilot signal receiver for receiving the pilot signal generated by the pilot generator in the second error amplifier block such that the pilot signal is reused by the fourth control loop to thereby further cancel intermodulation distortion in the output of the main amplifier block.
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公开(公告)号：US06952147B2
公开(公告)日：2005-10-04
申请号：US10738276
申请日：2003-12-16
申请人： Mark Gurvich , Alex Rabinovich , Jianqing He
发明人： Mark Gurvich , Alex Rabinovich , Jianqing He
IPC分类号： H01P5/18
CPC分类号： H01P5/185
摘要： A microstrip coupler is provided which includes an controlled capacitance bridge for improved directivity as compared to prior art controlled capacitance bridges. The novel controlled capacitance bridge provides the functionality of prior art wire or ribbon controlled capacitance bridges and also provides the necessary capacitance to compensate for the different phase velocities of odd and even modes in the transmission lines. Both the dimensions of the controlled capacitance bridge and the dimensions of an input microstrip conductor may be adjusted to provide the appropriate level of capacitance. In some embodiments, the controlled capacitance bridge connects segments of an input microstrip conductor. In other embodiments, the controlled capacitance bridge connects microstrip conductors which are configured to couple an input signal from an input microstrip conductor.
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公开(公告)号：US06946906B2
公开(公告)日：2005-09-20
申请号：US10723094
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： H03F1/3235 , H03F1/32
摘要： A system and method of pilot tone reuse. The present invention therefore provides a feedforward amplifier, comprising: an input that accepts a radio frequency signal having multiple carriers; a first control loop including a main amplifier block and a detector, wherein the first control loop generates a first carrier cancelled signal; a second control loop including a pilot generator, I/Q demodulator, vector modulator and first error amplifier block, wherein the pilot generator, I/Q demodulator and first error amplifier block amplify the first carrier cancelled signal and generates a pilot signal; a third control loop comprising a vector modulator and a second carrier cancellation detector; and a fourth control loop comprising of vector modulator, a second error amplifier block, and a pilot signal receiver for receiving the pilot signal generated by the pilot generator in the second error amplifier block such that the pilot signal is reused by the fourth control loop to thereby further cancel intermodulation distortion in the output of the main amplifier block.
摘要翻译： 导频音复用的系统和方法。 因此，本发明提供一种前馈放大器，包括：接收具有多个载波的射频信号的输入; 包括主放大器块和检测器的第一控制回路，其中所述第一控制回路产生第一载波消除信号; 包括导频发生器，I / Q解调器，矢量调制器和第一误差放大器块的第二控制环路，其中导频发生器，I / Q解调器和第一误差放大器模块放大第一载波消除信号并产生导频信号; 第三控制回路，包括矢量调制器和第二载波消除检测器; 以及包括矢量调制器，第二误差放大器块和导频信号接收器的第四控制环路，用于接收由第二误差放大器模块中的导频发生器产生的导频信号，使得导频信号被第四控制环路再利用 从而进一步消除主放大器块的输出中的互调失真。
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公开(公告)号：US20050113052A1
公开(公告)日：2005-05-26
申请号：US10723802
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： H03F1/32 , H03F1/3223 , H03F1/3229 , H03F1/3235 , H03F3/24 , H04B2001/0441
摘要： A dual loop feedforward power amplifier. A dual loop feedforward power amplifier, comprising an input that provides a multicarrier signal; a first feedforward power amplifier; and a second feedforward power amplifier, wherein the first feedforward power amplifier serves as a main amplifier gain block in the second feedforward power amplifier, wherein the first feedforward power amplifier comprises a carrier cancellation loop and a first error amplifier loop, and wherein the second feedforward power amplifier comprises a third loop and a fourth loop that cancel small signal distortions that are not reduced by the first feedforward amplifier.
摘要翻译： 双环前馈功率放大器。 一种双环前馈功率放大器，包括提供多载波信号的输入; 第一前馈功率放大器; 以及第二前馈功率放大器，其中所述第一前馈功率放大器用作所述第二前馈功率放大器中的主放大器增益块，其中所述第一前馈功率放大器包括载波消除环路和第一误差放大器环路，并且其中所述第二前馈功率放大器 功率放大器包括消除由第一前馈放大器未减小的小信号失真的第三环路和第四环路。
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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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