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公开(公告)号：US06531918B1
公开(公告)日：2003-03-11
申请号：US09189642
申请日：1998-11-10
申请人： Richard D. Posner , Charles R. Gentzler , Kwang Kim , Do B. Shin
发明人： Richard D. Posner , Charles R. Gentzler , Kwang Kim , Do B. Shin
IPC分类号： H03F126
CPC分类号： H03F1/3229
摘要： The invention relates to a low cost feed forward RF power amplifier arrangement for amplifying an RF input signal using a main power amplifier operating as a class A/B amplifier. The method and apparatus modify the input signal to the main amplifier to compensate for the distortion added by the main power amplifier. The circuit provides for injecting a delayed version of the input signal, through a fixed gain-phase circuity, at a point whereby the resulting signal is amplified by the error amplifier of the second loop. A digitally controlled processor iteratively modifies various phase and gain controls to adjust the output of the amplifier. Different gain and phase control lines are iteratively updated at different rates.
摘要翻译： 本发明涉及一种低成本的前馈RF功率放大器装置，用于使用用作A / B类放大器的主功率放大器来放大RF输入信号。 该方法和装置将输入信号修改为主放大器，以补偿由主功率放大器增加的失真。 该电路通过固定的增益相位电路来提供输入信号的延迟版本，从而由此产生的信号由第二回路的误差放大器放大。 数字控制处理器迭代地修改各种相位和增益控制以调节放大器的输出。 不同的增益和相位控制线以不同的速率迭代更新。
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公开(公告)号：US6144255A
公开(公告)日：2000-11-07
申请号：US174640
申请日：1998-10-19
申请人： Sandip Patel , Wayne Roberts , Kwang Kim , Stefan Klein , Richard D. Posner , Do B. Shin
发明人： Sandip Patel , Wayne Roberts , Kwang Kim , Stefan Klein , Richard D. Posner , Do B. Shin
CPC分类号： H03F1/3229
摘要： A method and apparatus for reducing out-of-band frequency components of an RF amplified input signal, the amplified signal having both in-band frequency components and out-of-band frequency components, employ a feedforward network in which a microprocessor can sweep a frequency generator output connected to a mixer, the other input of the mixer being the amplified output, to find the carrier frequency of the input signal, and thereafter modify or control the feedforward circuit to reduce out-of-band frequency component energies in a particular manner. For example, gain and phase of a variable gain-phase network in a feedforward circuit structure can be modified for reducing the out-of-band frequency component energy.
摘要翻译： 一种用于减少RF放大输入信号的带外频率分量的方法和装置，具有带内频率分量和带外频率分量两者的放大信号采用前馈网络，其中微处理器可以扫描 频率发生器输出连接到混频器，混频器的另一个输入是放大输出，以找到输入信号的载波频率，然后修改或控制前馈电路，以减少特定频带内的带外频率分量能量 方式。 例如，可以修改前馈电路结构中的可变增益相位网络的增益和相位，以减少带外频率分量能量。
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3.发明授权公开(公告)号：US07231191B2
公开(公告)日：2007-06-12
申请号：US10052801
申请日：2001-10-29
IPC分类号： H04B1/04
CPC分类号： H03F1/3247 , H03F1/3229
摘要： A control system for a linear feed-forward amplifier, using the ratio of measured spurious energy. Measuring receivers are coupled to two monitoring points to measure the spurious energy content in the error signal and at the main output of a feed-forward amplifier. The control system measures the ratio of these detected spurious, and uses this to optimize the settings of the second loop distortion cancellation. With the addition of an extra monitoring point, the same technique may also be used to control an adaptive predistorter prior to the main amplifier.
摘要翻译： 用于线性前馈放大器的控制系统，使用测量的杂散能量的比率。 测量接收机耦合到两个监测点，以测量误差信号中的前馈放大器的主输出端的杂散能量含量。 控制系统测量这些检测到的杂散的比率，并且使用它来优化第二回路失真消除的设置。 通过添加额外的监控点，也可以使用相同的技术来控制主放大器之前的自适应预失真器。
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4.发明授权公开(公告)号：US07015753B2
公开(公告)日：2006-03-21
申请号：US10859392
申请日：2004-06-02
申请人： Richard D. Posner , James Beasley
发明人： Richard D. Posner , James Beasley
IPC分类号： H03F1/26
CPC分类号： H03F1/26 , H03F1/3229
摘要： A digital signal processing based feed forward amplifier includes a delay circuit which receives a portion of the input signal and generates a delayed input signal. A first analog to digital converter receives another portion of the input signal and generates a digitized input signal. A main amplifier receives the delayed input signal and generates a main amplified signal. A second analog to digital converter receives at least a portion of the main amplified signal and converts it to a digitized main amplified signal. A digital signal processor receives the digitized input signal and the digitized main amplified signal and generates a digitized error signal. The digitized error signal is converted to an analog error signal by a digital to analog converter. An error amplifier receives the analog error signal and amplifies it to generate an amplified error signal. This error signal includes a noise and distortion component which is substantially the same in magnitude as the noise and distortion component of the main amplified signal. The amplified error signal and the main amplified signal are combined so that the noise and distortion components of each subtract, leaving substantially only the amplified desired signal component remaining in the amplified input signal, which is outputted by the feed forward amplifier. A third analog to digital converter converts a portion of the amplified error signal to a digitized amplified error signal, and a fourth analog to digital converter converts a portion of the output signal to a digitized output signal. The digitized output signal and the digitized amplified error signal are provided to the digital signal processor which generates the digitized error signal in response thereto.
摘要翻译： 基于数字信号处理的前馈放大器包括延迟电路，其接收输入信号的一部分并产生延迟的输入信号。 第一模数转换器接收输入信号的另一部分并产生数字化的输入信号。 主放大器接收延迟输入信号并产生主放大信号。 第二模数转换器接收主放大信号的至少一部分并将其转换为数字化的主放大信号。 数字信号处理器接收数字化的输入信号和数字化的主放大信号并产生数字化的误差信号。 数字化误差信号由数模转换器转换为模拟误差信号。 误差放大器接收模拟误差信号并对其进行放大以产生放大的误差信号。 该误差信号包括与主放大信号的噪声和失真分量基本上相同的噪声和失真分量。 放大的误差信号和主放大信号被组合，使得每个的噪声和失真分量相减，基本上只剩下由前馈放大器输出的被放大的输入信号中放大的期望信号分量。 第三模数转换器将放大的误差信号的一部分转换成数字化的放大误差信号，并且第四模数转换器将输出信号的一部分转换成数字化的输出信号。 数字化输出信号和数字化放大误差信号被提供给数字信号处理器，该数字信号处理器响应于此产生数字化的误差信号。
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5.发明授权System and method providing amplification of narrow band signals with multi-channel amplifiers 有权利用多通道放大器提供窄带信号放大的系统和方法公开(公告)号：US06243038B1
公开(公告)日：2001-06-05
申请号：US09213980
申请日：1998-12-17
IPC分类号： H01Q322
摘要： Systems and methods are taught whereby amplification of narrowband signals may be accomplished by linear power amplifiers requiring the presence of a communicated broadband signal in order to make internal adjustments necessary for linear operation. A preferred embodiment is described utilizing an input of a distributed amplifier assembly unused by the signals of interest in order to inject an emulated CDMA tone operable as a pilot tone for use by the linear power amplifiers.
摘要翻译： 教导了系统和方法，其中窄带信号的放大可以由需要存在所传送的宽带信号的线性功率放大器来实现，以便进行线性操作所需的内部调整。 利用由感兴趣的信号未使用的分布式放大器组件的输入来描述优选实施例，以便注入可操作为导频音的模拟CDMA音调以供线性功率放大器使用。
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公开(公告)号：US6147555A
公开(公告)日：2000-11-14
申请号：US174715
申请日：1998-10-19
申请人： Richard D. Posner , Kwang Kim , Stefan Klein , Wayne Roberts , Gregory French
发明人： Richard D. Posner , Kwang Kim , Stefan Klein , Wayne Roberts , Gregory French
CPC分类号： H03F1/3241 , H03F1/3229
摘要： A method and apparatus reduce the out-of-band frequency components of an RF amplified signal, preferably a CDMA signal, which has a carrier frequency which is not known in advance. The apparatus and method feature locating the frequency of the incoming signal by examining an RF output signal having both in-band frequency components and out-of-band frequency components. Typically the output signal is generated using a high-power, Class A/B amplifier. Once the frequency of the carrier has been determined, the out-of-band components are used to generate control signals which, in, for example, a feedback or feedforward circuitry, reduce the energy of the out-of-band signals and thereby provide a more linear amplifier transfer function.
摘要翻译： 一种方法和装置降低了RF放大信号（优选CDMA信号）的带外频率分量，其具有预先不知道的载波频率。 该装置和方法通过检查具有带内频率分量和带外频率分量两者的RF输出信号来定位输入信号的频率。 通常，使用大功率A / B类放大器产生输出信号。 一旦已经确定了载波的频率，则使用带外分量来产生控制信号，所述控制信号在例如反馈或前馈电路中降低带外信号的能量，从而提供 更线性的放大器传递函数。
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公开(公告)号：US6140874A
公开(公告)日：2000-10-31
申请号：US174691
申请日：1998-10-19
CPC分类号： H03F1/3229 , H03F1/3241
摘要： A method and apparatus for reducing out-of-band frequency components of an RF signal having a carrier frequency which is not known in advance employ a control signal to vary adjustable bias parameters of the circuit. In particular embodiments, the RF signal is generated from a MOSFET power amplifier, which introduces distortion components into its output signal. Bias parameters of the MOSFET amplifier can be varied to reduce out-of-band frequency components, that is, out-of-band distortion. In addition, other elements of the network can be controlled by varying bias parameters, for example, a predistorter.
摘要翻译： 用于减少具有预先不知道的载波频率的RF信号的带外频率分量的方法和装置采用控制信号来改变电路的可调偏置参数。 在特定实施例中，RF信号从MOSFET功率放大器产生，MOSFET功率放大器将失真分量引入其输出信号。 可以改变MOSFET放大器的偏置参数以减少带外频率分量，即带外失真。 此外，网络的其他元件可以通过改变偏置参数来控制，例如，预失真器。
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公开(公告)号：US06252871B1
公开(公告)日：2001-06-26
申请号：US09108734
申请日：1998-07-01
申请人： Richard D. Posner , Thuan Tran
发明人： Richard D. Posner , Thuan Tran
IPC分类号： H04L1250
CPC分类号： H04B7/0689 , H01P5/04
摘要： An apparatus for either combining a plurality of high frequency RF signal inputs or splitting a single RF frequency input into a plurality of RF signal outputs employs a switchable combining/splitting section and a switchable matching section. The switchable combining/splitting section operates to either combine the RF signal inputs to a common summed output or to take a matched input and to split it into a plurality of outputs. The matching section operates to switchably match the impedance presented by the combining/splitting section to achieve a minimum or zero insertion loss through the apparatus.
摘要翻译： 一种用于组合多个高频RF信号输入或将单个RF频率输入分离成多个RF信号输出的装置采用可切换组合/分离部分和可切换匹配部分。 可切换组合/分离部分操作以将RF信号输入组合到公共相加的输出或者获取匹配的输入并将其分成多个输出。 匹配部分操作以可切换地匹配由组合/分离部分呈现的阻抗，以实现通过该装置的最小或零插入损耗。
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