公开(公告)号：US07656229B2

公开(公告)日：2010-02-02

申请号：US12021061

申请日：2008-01-28

Applicant: Junxiong Deng ,  Li Liu ,  Prasad S. Gudem

Inventor： Junxiong Deng ,  Li Liu ,  Prasad S. Gudem

IPC: H03F3/38

CPC classification number: H03F3/193 ,  H03F1/223 ,  H03F1/3205 ,  H03F1/34 ,  H03F2200/294 ,  H03F2201/3206

Abstract: An electronic device includes an amplifier circuit coupled to a linearizer. The amplifier circuit may receive a first input signal including first and second frequencies and generate a first output signal including a delta frequency signal at a delta frequency, which is the difference between the first frequency and the second frequency. The linearizer includes a signal detector circuit, a current-mirror circuit, a low pass filter, a phase shifter, and a bias circuit. The signal detector circuit may generate a second output signal. The current-mirror circuit may adjust an amplitude of a signal. The low pass filter may eliminate a portion of the second output signal having frequencies greater than the delta frequency. The phase shifter may generate a feedback signal corresponding to the delta frequency signal. An amplitude and/or a phase of the feedback signal is different from an amplitude and/or a phase of the delta frequency signal.

Abstract translation: 电子设备包括耦合到线性化器的放大器电路。 放大器电路可以接收包括第一和第二频率的第一输入信号，并产生第一输出信号，该第一输出信号包括第一频率和第二频率之间的差异的增量频率的增量频率信号。 线性化器包括信号检测器电路，电流镜电路，低通滤波器，移相器和偏置电路。 信号检测器电路可以产生第二输出信号。 电流镜电路可以调节信号的幅度。 低通滤波器可以消除具有大于Δ频率的频率的第二输出信号的一部分。 移相器可以产生对应于Δ频率信号的反馈信号。 反馈信号的幅度和/或相位与增量频率信号的振幅和/或相位不同。

公开(公告)号：US07414469B2

公开(公告)日：2008-08-19

申请号：US11699042

申请日：2007-01-29

Applicant: David F Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

Inventor： David F Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

IPC: H03F3/68

CPC classification number: H03F1/02 ,  H03F1/0205 ,  H03F1/0211 ,  H03F1/0261 ,  H03F1/0294 ,  H03F1/32 ,  H03F3/211 ,  H03F3/24 ,  H03F3/38 ,  H03F2200/102 ,  H03F2201/3206 ,  H03G3/3042 ,  H04B1/04

Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

Abstract translation: 本文公开了用于矢量组合功率放大的方法和系统。 在一个实施例中，多个信号被单独放大，然后相加以形成期望的时变复包络信号。 控制一个或多个信号的相位和/或频率特性以提供期望的时变复包络信号的期望的相位，频率和/或幅度特性。 在另一个实施例中，时变复包络信号被分解为多个恒定包络分量信号。 构成信号被均等地或基本相等地放大，然后相加以构建原始时变包络信号的放大版本。 实施例还执行上变频。

公开(公告)号：US07378902B2

公开(公告)日：2008-05-27

申请号：US11699045

申请日：2007-01-29

Applicant: David F Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

Inventor： David F Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

IPC: G01R19/00 ,  H03F3/68

CPC classification number: H03F1/02 ,  H03F1/0205 ,  H03F1/0211 ,  H03F1/0261 ,  H03F1/0294 ,  H03F1/32 ,  H03F3/211 ,  H03F3/24 ,  H03F3/38 ,  H03F2200/102 ,  H03F2201/3206 ,  H03G3/3042 ,  H04B1/04

Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

Abstract translation: 本文公开了用于矢量组合功率放大的方法和系统。 在一个实施例中，多个信号被单独放大，然后相加以形成期望的时变复包络信号。 控制一个或多个信号的相位和/或频率特性以提供期望的时变复包络信号的期望的相位，频率和/或幅度特性。 在另一个实施例中，时变复包络信号被分解为多个恒定包络分量信号。 构成信号被均等地或基本相等地放大，然后相加以构建原始时变包络信号的放大版本。 实施例还执行上变频。

公开(公告)号：US07355470B2

公开(公告)日：2008-04-08

申请号：US11508989

申请日：2006-08-24

Applicant: David F. Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

Inventor： David F. Sorrells ,  Gregory S. Rawlins ,  Michael W. Rawlins

IPC: G01R19/00

CPC classification number: H03F1/02 ,  H03F1/0205 ,  H03F1/0211 ,  H03F1/0261 ,  H03F1/0294 ,  H03F1/32 ,  H03F3/211 ,  H03F3/24 ,  H03F3/38 ,  H03F2200/102 ,  H03F2201/3206 ,  H03G3/3042 ,  H04B1/04

Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

公开(公告)号：US06996378B2

公开(公告)日：2006-02-07

申请号：US09112269

申请日：1998-07-08

Applicant: Jochen Helms

Inventor： Jochen Helms

IPC: H04B1/10 ,  H04B1/02

CPC classification number: H03F1/3247 ,  H03F2200/57 ,  H03F2201/3206 ,  H03F2201/3233

Abstract: A transmitter for a plurality of carriers of a broad-band transmitting spectrum which contains a broad-band power amplifier encompassing the carriers for amplifying an input signal into a more powerful output signal, wherein a measuring signal is formed from the output signal with the aid of a decoupler. The transmitter further contains an adaptation unit for comparing the input signals to the measuring signals and for thereafter forming a correction signal. A predistortion of the input signal is performed in a predistortion unit in the transmitter corresponding to the setpoint selections of the correction signal.

Abstract translation: 一种用于宽带发射频谱的多个载波的发射机，其包含宽带功率放大器，其包括用于将输入信号放大为更强大的输出信号的载波，其中，借助于输出信号形成测量信号 的解耦器。 发射机还包括用于将输入信号与测量信号进行比较并用于之后形成校正信号的适配单元。 输入信号的预失真在对应于校正信号的设定点选择的发射机中的预失真单元中执行。

公开(公告)号：US20030085761A1

公开(公告)日：2003-05-08

申请号：US10153630

申请日：2002-05-24

Applicant: Hitachi Kokusai Electric Inc.

Inventor： Yoichi Okubo ,  Kiyoshi Funada ,  Masaki Suto ,  Masato Horaguchi ,  Toshio Takada ,  Naoki Hongo

IPC: H03F001/26

CPC classification number: H03F1/3229 ,  H03F1/32 ,  H03F1/3247 ,  H03F2200/102 ,  H03F2201/3206

Abstract: A distortion reducing circuit compensates an upper side third-order distortion and a lower side third-order distortion produced by an amplifier for amplifying a fundamental signal including multiple frequency components. The distortion reducing circuit includes a second harmonic reflection coefficient regulation circuit, installed at an output side of the amplifier, for regulating reflection coefficients for multiple frequency components included in a second harmonic signal to have a constant value.

Abstract translation: 失真减小电路补偿由用于放大包括多个频率分量的基本信号的放大器产生的上侧三阶失真和下侧三次失真。 失真减小电路包括安装在放大器的输出侧的二次谐波反射系数调节电路，用于调节包括​​在二次谐波信号中的多个频率分量的反射系数以具有恒定值。

公开(公告)号：US06188732B1

公开(公告)日：2001-02-13

申请号：US09174760

申请日：1998-10-19

Applicant: Peter S. Rha

Inventor： Peter S. Rha

IPC: H04K102

CPC classification number: H03F1/3276 ,  H03F1/3229 ,  H03F1/3294 ,  H03F2201/3206 ,  H04L27/2623

Abstract: A digital feedforward (FF) amplifier system is disclosed for use in an RF transmission system. The digital FF amplifier uses digital signal processing to generate error correction signals that reduce intermodulation distortion caused by saturation of the main power amplifier. The digital signals in the improved FF amplifier may be buffered, if necessary, thereby eliminating the need for delay lines. A main amplification branch includes a digital combiner for summing input digital signals, digital-to-analog converters, RF modulation circuitry and a main power amplifier. An error correction signal branch includes an error correction signal generator, digital-to-analog converters, and RF modulation circuitry. The RF outputs of the main amplification branch and the error correction signal branch are combined to produce an RF output signal with reduced distortion. Optionally, an amplifier characterization branch may be included comprising RF output feedback circuitry and an amplifier model. The amplifier model updates the error correction generator with time varying characteristic information about the main power amplifier.

Abstract translation: 公开了用于RF传输系统的数字前馈（FF）放大器系统。 数字FF放大器使用数字信号处理来产生减少主功率放大器饱和引起的互调失真的纠错信号。 如果需要，改进的FF放大器中的数字信号可以被缓冲，从而不需要延迟线。 主放大分支包括用于对输入数字信号求和的数字组合器，数模转换器，RF调制电路和主功率放大器。 纠错信号分支包括纠错信号发生器，数 - 模转换器和RF调制电路。 主放大分支和纠错信号分支的RF输出被组合以产生具有减小的失真的RF输出信号。 可选地，可以包括放大器表征分支，其包括RF输出反馈电路和放大器模型。 放大器模型使用主功率放大器的时变特性信息来更新误差校正发生器。

公开(公告)号：US20150333716A1

公开(公告)日：2015-11-19

申请号：US14275897

申请日：2014-05-13

Applicant: MEDIATEK INC.

Inventor： Tze-Chien Wang

IPC: H03G1/00 ,  H03F1/26

CPC classification number: H03G1/0088 ,  H03F1/0277 ,  H03F1/26 ,  H03F3/211 ,  H03F3/72 ,  H03F2200/372 ,  H03F2201/3206 ,  H03F2203/7215 ,  H03F2203/7221 ,  H03F2203/7236

Abstract: A method and an apparatus for performing signal amplifying with aid of switching control are provided, where the method may include the steps of: modulating an input signal of a gain stage based on one of several modulation schemes to generate at least one first amplified result of a first amplifying path of the gain stage; modulating the input signal of the gain stage based on one of the several modulation schemes to generate at least one second amplified result of a second amplifying path of the gain stage; and generating an amplified signal of the gain stage based on at least the first amplified result and the second amplified result. In addition, at least one switching time point of the first amplifying path for switching between the several modulation schemes and one switching time point of the second amplifying path for switching between the several modulation schemes are non-overlapped.

Abstract translation: 提供了一种借助于切换控制来进行信号放大的方法和装置，其中该方法可以包括以下步骤：基于若干调制方案之一调制增益级的输入信号，以产生至少一个第一放大结果 增益级的第一放大路径; 基于所述多个调制方案之一调制所述增益级的输入信号，以生成所述增益级的第二放大路径的至少一个第二放大结果; 以及至少基于第一放大结果和第二放大结果生成增益级的放大信号。 此外，用于在几个调制方案之间切换的第一放大路径的至少一个切换时间点和用于在若干调制方案之间切换的第二放大路径的一个切换时间点是非重叠的。

公开(公告)号：US20150171798A1

公开(公告)日：2015-06-18

申请号：US14107135

申请日：2013-12-16

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： SHAFIULLAH SYED ,  JIUN HOW NG

IPC: H03F1/32 ,  H03F3/193 ,  H03F3/68 ,  H03F1/26

CPC classification number: H03F1/3223 ,  H03F1/0277 ,  H03F1/223 ,  H03F1/26 ,  H03F3/193 ,  H03F3/68 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/451 ,  H03F2201/3206 ,  H03F2201/3221

Abstract: A low-noise amplifier is provided that includes an input amplifier stage coupled to a plurality of independently switchable output amplifier stages. The input amplifier stage is operative to amplify an input communications signal, and it provides both an amplified communications signal and a feedforward signal. The amplified communications signal and the feedforward signal both include a distortion component. Each of the switchable output stages is operative to provide an output that combines the feedforward signal with the amplified communications signal in such as way that the distortion components of the signals at least partially cancel one another. In some embodiments, the switching of the output amplifier stages is performed by circuitry that also serves to improve reverse isolation of the separate output amplifier stages.

Abstract translation: 提供了一种低噪声放大器，其包括耦合到多个可独立切换的输出放大器级的输入放大器级。 输入放大器级用于放大输入通信信号，并且其提供放大的通信信号和前馈信号。 放大的通信信号和前馈信号都包括失真分量。 每个可切换输出级可操作以提供将前馈信号与放大的通信信号组合的输出，使得信号的失真分量至少部分地相互抵消。 在一些实施例中，输出放大器级的切换由也用于改善分离的输出放大器级的反向隔离的电路来执行。

公开(公告)号：US20140219174A1

公开(公告)日：2014-08-07

申请号：US14248597

申请日：2014-04-09

Applicant: Dali Systems Co., Ltd.

Inventor： Chengxun WANG ,  Shawn Patrick STAPLETON

IPC: H04W24/02

CPC classification number: H03F1/304 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/087 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/18 ,  H03F2200/204 ,  H03F2200/207 ,  H03F2200/447 ,  H03F2200/451 ,  H03F2201/3206 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3215 ,  H03F2201/3224 ,  H03F2201/3227 ,  H04L25/067 ,  H04L25/08 ,  H04L27/0008 ,  H04L27/368 ,  H04W24/02

Abstract: A remote radio head unit (RRU) system for multiple operating frequency bands, multi-channels, driven by a single or more wide band power amplifiers. More specifically, the present invention enables multiple-bands RRU to use fewer power amplifers in order to reduce size and cost of the multi-band RRU. The present invention is based on the method of using duplexers and/or interference cancellation system technique to increase the isolation between the transmitter signal and receiver signal of the RRU.

Abstract translation: 用于多个工作频带的远程无线电头单元（RRU）系统，由多个单个或多个宽带功率放大器驱动的多通道。 更具体地，本发明使得多频带RRU能够使用更少的功率放大器，以便减少多频带RRU的尺寸和成本。 本发明基于使用双工器和/或干扰消除系统技术来增加RRU的发射机信号和接收机信号之间的隔离的方法。