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公开(公告)号：US06677823B2
公开(公告)日：2004-01-13
申请号：US10083801
申请日：2002-02-27
IPC分类号： H03G320
CPC分类号： H03F1/30 , H03G3/3042
摘要： An automatic gain compensation circuit for actively adjusting the gain of an amplifier caused by in-loop and/or out-of-loop influences on system gain. Two matched RF detectors convert pre- and post-amplified signals to input and output voltages representative of the power of the RF signals. A gain control circuit which may include a Digital Analog Converter (DAC) utilizes an offset voltage that is weighted along with the input and output voltages to produce an error voltage. The error voltage is used to drive a voltage-controlled attenuator within the amplification path. Operational amplifiers may be used in the weighting circuits for weighting the input, output, and offset voltages in order to prevent loading of the RF detector outputs and to obtain rapid settling time. During amplifier operation, the offset voltage is adjusted by a processing unit to compensate for gain changes in the amplifier due to out-of-loop temperature-related influences on system gain.
摘要翻译： 一种自动增益补偿电路，用于主动调节放大器的增益，该放大器由环路和/或环外影响系统增益引起。 两个匹配的RF检测器将前置放大后信号转换为代表RF信号功率的输入和输出电压。 可以包括数字模拟转换器（DAC）的增益控制电路利用与输入和输出电压一起加权的偏移电压以产生误差电压。 误差电压用于驱动放大路径内的压控衰减器。 可以在加权电路中使用运算放大器来加权输入，输出和偏移电压，以防止RF检测器输出的加载并获得快速的建立时间。 在放大器工作期间，偏移电压由处理单元进行调整，以补偿由于与系统增益有关的环路温度相关影响而导致的放大器增益变化。
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公开(公告)号：US06744312B2
公开(公告)日：2004-06-01
申请号：US10090857
申请日：2002-03-05
申请人： Paul E. White , Robert W. Kooker
发明人： Paul E. White , Robert W. Kooker
IPC分类号： H03F114
摘要： The present invention provides a power amplifier system in which one or more power amplifiers may be inserted. The occupancy of ports by power amplifiers is monitored by a controller. The system has a plurality of output lines, each with different electrical line characteristics. The controller is responsive to ports becoming occupied or unoccupied by power amplifiers and routes the output signal through the output line having the electrical line characteristics that ensure an efficient signal transfer. Further, the switching configuration of the present invention eliminates the need for output signals to traverse through a switch.
摘要翻译： 本发明提供了一种功率放大器系统，其中可以插入一个或多个功率放大器。 由功率放大器占用端口由控制器监控。 该系统具有多个输出线，每条输出线具有不同的电线特性。 控制器响应于被功率放大器占用或未占用的端口，并且通过具有确保有效信号传输的电线特性的输出线路路由输出信号。 此外，本发明的切换配置消除了对输出信号穿过开关的需要。
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3.发明授权公开(公告)号：US06963242B2
公开(公告)日：2005-11-08
申请号：US10631547
申请日：2003-07-31
申请人： Paul E. White , Breck W. Lovinggood
发明人： Paul E. White , Breck W. Lovinggood
CPC分类号： H03F1/3258
摘要： An amplifier system containing a polynomial predistorer and a polynominal predistorter configured for use with an RF power amplifier, the polynomial predistorter having a polynomial generator configured to receive an RF input signal and generate a predistortion function based thereon, and a combiner circuit also configured to receive the RF input signal and coupled to the polynomial generator and configured to combine the RF input signal with the predistortion function to form a predistorted input signal, the predistorted input signal operable to improve the adjacent channel power and/or the error vector magnitude performance of the RF power amplifier.
摘要翻译： 一种放大器系统，包括多项式预先计数器和被配置为与RF功率放大器一起使用的多项式预失真器，所述多项式预失真器具有多项式预失真器，其被配置为接收RF输入信号并基于此产生预失真函数，以及组合器电路，其还被配置为接收 RF输入信号并且耦合到多项式发生器并且被配置为将RF输入信号与预失真函数组合以形成预失真输入信号，所述预失真输入信号可操作以改善相邻信道功率和/或误差矢量幅度性能 射频功率放大器。
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公开(公告)号：US06937482B2
公开(公告)日：2005-08-30
申请号：US10733564
申请日：2003-12-11
CPC分类号： H05K9/0037
摘要： A power feedforward amplifier uses integral cavities to provide RF isolation between subcircuits of the power amplifier. The chassis includes a main chassis body and a lid structure adapted to couple with the chassis body and define the subcircuit cavities. The inner lid includes an amplifier dividing wall and interstage walls adapted to isolate the main and error amplifier subcircuits of the feedforward power amplifier and further to isolate individual components of the subcircuits. In one embodiment, the amplifier subcircuits are mounted on a single circuit board and isolated from each other by the dividing wall. A delay line subcircuit portion is integral with the main chassis body and is coupled beneath the error amplifier subcircuit to contain and electromagnetically shield a delay line filter subcircuit while providing direct connection with the error amplifier.
摘要翻译： 功率前馈放大器使用整体腔来在功率放大器的子电路之间提供RF隔离。 底盘包括主底盘主体和适于与底架主体联接并限定子电路腔的盖结构。 内盖包括放大器分隔壁和级间壁，其适于隔离前馈功率放大器的主和误差放大器子电路，并进一步隔离子电路的各个部件。 在一个实施例中，放大器子电路安装在单个电路板上，并通过分隔壁相互隔离。 延迟线分支部分与主机架主体成一体，并且被耦合在误差放大器子电路之下，以容纳和电磁屏蔽延迟线滤波器子电路，同时提供与误差放大器的直接连接。
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公开(公告)号：US07167693B2
公开(公告)日：2007-01-23
申请号：US10942486
申请日：2004-09-16
申请人： Thomas A. Bachman, II , Robert W. Kooker , Paul E. White , Paul Everline , Robert Snyder , David M. January , Leonard Sarver , Philip Shenenberger
发明人： Thomas A. Bachman, II , Robert W. Kooker , Paul E. White , Paul Everline , Robert Snyder , David M. January , Leonard Sarver , Philip Shenenberger
CPC分类号： H03F1/3229
摘要： A feed forward power amplifier system and method identify active channels across a frequency band to suppress unwanted intermodulation distortion (IMD) products in a communications signal such as a single- or multi-carrier communications signal. A scanning receiver identifies at least one active channel in a frequency band, and identifies at least one portion of the frequency band likely to include IMD products based upon the identified active channel(s). Based upon the identified portion of the frequency band, IMD products are suppressed from the communications signal, e.g., by controlling the magnitude and/or phase of a suppression signal mixed with the communications signal.
摘要翻译： 前馈功率放大器系统和方法识别跨频带的有源信道，以抑制诸如单载波或多载波通信信号的通信信号中的不必要的互调失真（IMD）产物。 扫描接收机识别频带中的至少一个有效信道，并且基于所识别的活动信道来识别可能包括IMD产品的频带的至少一部分。 基于所识别的频带部分，例如通过控制与通信信号混合的抑制信号的幅度和/或相位来抑制IMD产物从通信信号。
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公开(公告)号：US06829471B2
公开(公告)日：2004-12-07
申请号：US10091756
申请日：2002-03-06
申请人： Paul E. White , Thomas A. Bachman, II , Robert W. Kooker , Leonard Sarver , Robert Snyder , Paul Everline
发明人： Paul E. White , Thomas A. Bachman, II , Robert W. Kooker , Leonard Sarver , Robert Snyder , Paul Everline
IPC分类号： H04B116
CPC分类号： H03F1/3235 , H04B1/123
摘要： A power amplifier system and method for locating carrier frequencies across a frequency band, identifying the modulation format of each carrier, and locating and suppressing undesired intermodulation distortion (IMD) products generated by the power amplifier. The system includes an amplifier for amplifying RF carrier signals in a main signal path, a variable phase shifter and variable attenuator on a feed forward path, and a tunable receiver that digitizes a portion of the frequency band to baseband. The tunable receiver includes a tunable voltage controlled oscillator which provides an oscillating frequency to a mixer and is phase-locked to a highly stable reference oscillator. The mixer downconverts a desired RF based on the oscillating frequency to IF. A filter passes only a selected portion of the IF signals, and the filter has a passband sufficient to discern both narrowband and wideband carriers and their associated IMD products. Based on the locations of the carrier frequencies, a processing unit determines the IMD locations of the carrier frequencies, determines the IMD locations, and adjusts the variable phase shifter and variable attenuator on the feed forward path until the IMD products in the main signal path are suppressed below a desired threshold.
摘要翻译： 一种用于定位频带上的载波频率的功率放大器系统和方法，识别每个载波的调制格式，以及定位和抑制由功率放大器产生的不期望的互调失真（IMD）产物。 该系统包括用于放大主信号路径中的RF载波信号的放大器，前馈路径上的可变移相器和可变衰减器，以及将频带的一部分数字化为基带的可调谐接收器。 可调谐接收器包括可调谐压控振荡器，其将振荡频率提供给混频器，并且被锁相到高度稳定的参考振荡器。 混频器将基于振荡频率的所需RF降频到IF。 滤波器仅通过IF信号的选定部分，并且滤波器具有足以识别窄带和宽带载波及其相关IMD产物的通带。 基于载波频率的位置，处理单元确定载波频率的IMD位置，确定IMD位置，并且调整前馈路径上的可变移相器和可变衰减器，直到主信号路径中的IMD乘积为 抑制在所需阈值以下。
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公开(公告)号：US06760230B2
公开(公告)日：2004-07-06
申请号：US10085200
申请日：2002-02-26
IPC分类号： H05K500
CPC分类号： H05K9/0037
摘要： A power feedforward amplifier uses integral cavities to provide RF isolation between subcircuits of the power amplifier. The chassis includes a main chassis body and a lid structure adapted to couple with the chassis body and define the subcircuit cavities. The inner lid includes an amplifier dividing wall and interstage walls adapted to isolate the main and error amplifier subcircuits of the feedforward power amplifier and further to isolate individual components of the subcircuits. In one embodiment, the amplifier subcircuits are mounted on a single circuit board and isolated from each other by the dividing wall. A delay line subcircuit portion is integral with the main chassis body and is coupled beneath the error amplifier subcircuit to contain and electromagnetically shield a delay line filter subcircuit while providing direct connection with the error amplifier.
摘要翻译： 功率前馈放大器使用整体腔来在功率放大器的子电路之间提供RF隔离。 底盘包括主底盘主体和适于与底架主体联接并限定子电路腔的盖结构。 内盖包括放大器分隔壁和级间壁，其适于隔离前馈功率放大器的主和误差放大器子电路，并进一步隔离子电路的各个部件。 在一个实施例中，放大器子电路安装在单个电路板上，并通过分隔壁相互隔离。 延迟线分支部分与主机架主体成一体，并且被耦合在误差放大器子电路之下，以容纳和电磁屏蔽延迟线滤波器子电路，同时提供与误差放大器的直接连接。
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