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1. 发明授权

US06809587B2 Active predistorting linearizer with agile bypass circuit for safe mode operation 失效
标题翻译：具有敏捷旁路电路的主动预失真线性化电路，用于安全模式运行
公开(公告)号：US06809587B2
公开(公告)日：2004-10-26
申请号：US10127722
申请日：2002-04-23
申请人： Fadhel Ghannouchi , Said Touimer , François Beauregard , Chan-Wang Park , Ahmed A. Boutouili
发明人： Fadhel Ghannouchi , Said Touimer , François Beauregard , Chan-Wang Park , Ahmed A. Boutouili
IPC分类号： H03F126
CPC分类号： H03F1/3282 , H03F2200/198
摘要： An active predistorting linearizer with agile bypass circuit for safe mode operation is used in conjunction with an amplifier. This linearizer comprises a controllable input variable-attenuator and drive-amplifier circuit supplied with the input signal to attenuate and amplify the input signal. A predistorter includes a controllable phase-shifting and amplitude-adjusting path supplied with the attenuated and amplified input signal to distort the latter signal and produce a predistorted output signal. A controllable output variable-attenuator and drive-amplifier circuit is supplied with the predistorted output signal to attenuate and amplify this predistorted output signal before supplying it to the power amplifier. A phase-shifting and amplitude-adjusting controller is connected to the controllable input variable-attenuator and drive-amplifier circuit, the controllable phase-shifting and amplitude-adjusting path, and the controllable output variable-attenuator and drive-amplifier circuit. Finally, a bypass extends in parallel with the series circuit including the serially interconnected input variable-attenuator and drive-amplifier circuit, controllable phase-shifting and amplitude-adjusting path, and output variable-attenuator and drive-amplifier circuit. This bypass defines a bypass circuit established in response to a fault condition in the series circuit to bypass the faulty series circuit.
摘要翻译：具有安全模式操作的敏捷旁路电路的有源预失真线性化调节器与放大器结合使用。该线性化器包括可控输入可变衰减器和驱动放大器电路，该电路提供有输入信号以衰减和放大输入信号。预失真器包括被提供有衰减和放大的输入信号的可控相移和幅度调节路径，以使后一信号失真并产生预失真的输出信号。可控输出可变衰减器和驱动放大器电路提供预失真输出信号，以在将其提供给功率放大器之前衰减和放大该预失真输出信号。一个移相和调幅控制器连接到可控输入可变衰减器和驱动放大器电路，可控相移和幅度调节路径以及可控输出可变衰减器和驱动放大器电路。最后，旁路与串联电路并联延伸，包括串联的输入可变衰减器和驱动放大器电路，可控相移和幅度调节路径，以及输出可变衰减器和驱动放大器电路。该旁路定义了一个绕串联电路故障条件建立的旁路电路，以绕过故障串联电路。

2. 发明授权

US06255908B1 Temperature compensated and digitally controlled amplitude and phase channel amplifier linearizer for multi-carrier amplification systems 失效
标题翻译：用于多载波放大系统的温度补偿和数字控制幅度和相位通道放大器线性化
公开(公告)号：US06255908B1
公开(公告)日：2001-07-03
申请号：US09389511
申请日：1999-09-03
申请人： Fadhel Ghannouchi , Said Touimer , François Beauregard , Ammar B. Kouki
发明人： Fadhel Ghannouchi , Said Touimer , François Beauregard , Ammar B. Kouki
IPC分类号： H03F1126
CPC分类号： H03F1/3252 , H03F1/3276 , H03F2200/198
摘要： A linearizer channel amplifier for use in conjunction with a power amplifier comprises an input series circuit formed of a first variable attenuator, an input drive amplifier and a power limiter, and an output series circuit formed of a second variable attenuator and an output drive amplifier. Between the input and output series circuits is interposed a linearizer. In this linearizer, a splitter produces first and second signal portions, a first path comprises serially interconnected predistorter and third variable attenuator for distorting and adjusting the amplitude of the first signal portion, a second path comprises serially interconnected phase shifter and fourth variable attenuator for phase-shifting and adjusting the amplitude of the second signal portion, and a combiner combines the distorted and amplitude-adjusted first signal portion and the phase-shifted and amplitude-adjusted second signal portion to form a predistorted output signal applied to the output series circuit. A digital controller includes a processor for measuring the level of a temperature of operation of the power amplifier through an interface, and a look-up table for storing predistortion control parameters related to different levels of the temperature of operation. The processor is connected to the look-up table for selecting predistortion control parameters in relation to the measured temperature level, and for applying through a D/A converter and a signal conditioner the selected predistortion control parameters to the first, second, third and fourth variable attenuators and to the phase shifter in view of producing a predistorted output signal which cancels a distortion subsequently produced by the power amplifier.
摘要翻译：与功率放大器结合使用的线性化通道放大器包括由第一可变衰减器，输入驱动放大器和功率限制器形成的输入串联电路，以及由第二可变衰减器和输出驱动放大器形成的输出串联电路。在输入和输出串联电路之间插入线性化电路。在该线性化器中，分离器产生第一和第二信号部分，第一路径包括串联互连的预失真器和第三可变衰减器，用于使第一信号部分的振幅失真和调整，第二路径包括串联互连的移相器和用于相位的第四可变衰减器移位并调整第二信号部分的幅度，并且组合器组合失真和调幅的第一信号部分和相移和调幅的第二信号部分，以形成施加到输出串联电路的预失真输出信号。数字控制器包括用于通过接口测量功率放大器的操作温度的处理器，以及用于存储与不同操作温度等级相关的预失真控制参数的查找表。处理器连接到查找表，用于相对于测量的温度水平选择预失真控制参数，并且通过D / A转换器和信号调节器将所选择的预失真控制参数应用于第一，第二，第三和第四考虑到产生消除由功率放大器随后产生的失真的预失真输出信号，可变衰减器和相移器。

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