公开(公告)号：US06816016B2

公开(公告)日：2004-11-09

申请号：US10688444

申请日：2003-10-16

Applicant: Wendell B. Sander ,  Ronald A. Meck ,  Earl McCune

Inventor： Wendell B. Sander ,  Ronald A. Meck ,  Earl McCune

IPC: H03F368

CPC classification number: H03F1/0227

Abstract: The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., bard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired control or modulation. Unlike the prior art, feedback is not required. That is, the amplifier may be controlled without continuous or frequent feedback adjustment. In one embodiment, the spread between a maximum frequency of the desired modulation and the operating frequency of a switch-mode DC-DC converter is reduced by following the switch-mode converter with an active linear regulator. The linear regulator is designed so as to control the operating voltage of the power amplifier with sufficient bandwidth to faithfully reproduce the desired amplitude modulation waveform. The linear regulator is further designed to reject variations on its input voltage even while the output voltage is changed in response to an applied control signal. This rejection will occur even though the variations on the input voltage are of commensurate or even lower frequency than that of the controlled output variation. Amplitude modulation may be achieved by directly or effectively varying the operating voltage on the power amplifier while simultaneously achieving high efficiency in the conversion of primary DC power to the amplitude modulated output signal. High efficiency is enhanced by allowing the switch-mode DC-to-DC converter to also vary its output voltage such that the voltage drop across the linear regulator is kept at a low and relatively constant level. Time-division multiple access (TDMA) bursting capability may be combined with efficient amplitude modulation, with control of these functions being combined. In addition, the variation of average output power level in accordance with commands from a communications system may also be combined within the same structure.

Abstract translation: 一般而言，本发明以实现期望的控制或调制的方式提供高效率（例如限流或开关模式）功率放大器的高效率功率控制。 与现有技术不同，不需要反馈。 也就是说，放大器可以在没有连续或频繁的反馈调整的情况下被控制。 在一个实施例中，通过使用有源线性调节器跟随开关模式转换器来减小所需调制的最大频率与开关模式DC-DC转换器的工作频率之间的扩展。 线性稳压器被设计成以足够的带宽来控制功率放大器的工作电压，以忠实地再现所需的幅度调制波形。 线性稳压器进一步被设计为即使当输出电压响应于所施加的控制信号而改变时也可以抑制其输入电压的变化。 即使输入电压的变化与受控输出变化的变化相当甚至更低的频率，也将发生该抑制。 幅度调制可以通过直接或有效地改变功率放大器上的工作电压来实现，同时实现初级DC功率到幅度调制输出信号的转换的高效率。 通过允许开关模式DC-DC转换器也改变其输出电压，使得线性稳压器两端的电压降保持在较低且相对恒定的水平，从而提高了高效率。 时分多址（TDMA）突发能力可以与有效的幅度调制组合，并且这些功能的控制被组合。 此外，根据来自通信系统的命令的平均输出功率电平的变化也可以在相同的结构内组合。

公开(公告)号：US06794934B2

公开(公告)日：2004-09-21

申请号：US10022012

申请日：2001-12-14

Applicant: Andrea Betti-Berutto ,  Stefano D'Agostino

Inventor： Andrea Betti-Berutto ,  Stefano D'Agostino

IPC: H03F368

CPC classification number: H03F1/42 ,  H03F1/18 ,  H03F3/1935 ,  H03F3/607

Abstract: Methods and circuitry for implementing monolithic high gain wideband amplifiers. The invention implements an amplifier with a limiter that also performs a signal dividing function. In a specific embodiment, the limiter is designed to make available two in-phase outputs that are then used to drive two gate input lines of a combiner distributed amplifier.

Abstract translation: 用于实施单片高增益宽带放大器的方法和电路。 本发明实现了具有也执行信号分割功能的限幅器的放大器。 在具体实施例中，限幅器被设计成使可用的两个同相输出然后用于驱动组合器分布式放大器的两个栅极输入线。

公开(公告)号：US06791417B2

公开(公告)日：2004-09-14

申请号：US10430568

申请日：2003-05-05

Applicant: Raymond Sydney Pengelly ,  Simon Maurice Wood

Inventor： Raymond Sydney Pengelly ,  Simon Maurice Wood

IPC: H03F368

CPC classification number: H03F1/0288 ,  H03F1/0277 ,  H03F1/32 ,  H03F3/602 ,  H03F2201/3203

Abstract: An RF power amplifier circuit for amplifying an RF signal over a broad range of power with improved efficiency includes a carrier amplifier for amplifying an RF signal over a first range of power and with a power saturation level below the maximum of the broad range of power is disclosed. A plurality of peak amplifiers are connected in parallel with the carrier amplifier with each of the peak amplifiers being biased to sequentially provide an amplified output signal after the carrier amplifier approaches saturation. The input signal is applied through a signal splitter to the carrier amplifier and the plurality of peak amplifiers, and an output for receiving amplified output signals from the carrier amplifier and the plurality of peak amplifiers includes a resistive load R/2. The split input signal is applied through a 90° transformer to the carrier amplifier, and the outputs of the peak amplifiers are applied through 90° transformers to a output load. When operating below saturation, the carrier amplifier delivers power to a load of 2R and the carrier amplifier delivers current to the load, which is one-half the current at maximum power when the amplifier is saturated. In one embodiment with the output having an impedance, Z, the carrier amplifier and each peak amplifier is connected to the output through an output-matching network presenting an output impedance of less than Z to each amplifier and with each output-matching network having selected phase length to reduce reactance of the output impedance.

Abstract translation: 一种RF功率放大器电路，用于在提高效率的宽范围的功率范围内放大RF信号，包括载波放大器，用于在第一功率范围内放大RF信号，并且功率饱和电平低于功率范围宽度的最大值 披露 多个峰值放大器与载波放大器并联连接，每个峰值放大器被偏置以在载波放大器接近饱和之后依次提供放大的输出信号。 输入信号通过信号分离器施加到载波放大器和多个峰值放大器，并且用于从载波放大器和多个峰值放大器接收放大的输出信号的输出包括电阻负载R / 2。 分路输入信号通过90°变压器施加到载波放大器，峰值放大器的输出通过90°变压器施加到输出负载。 当工作在饱和度以下时，载波放大器将功率输送到2R的负载，并且载波放大器将电流传递到负载，当放大器饱和时，其为最大功率时的电流的一半。 在一个实施例中，输出具有阻抗Z，载波放大器和每个峰值放大器通过输出匹配网络连接到输出，输出匹配网络向每个放大器呈现小于Z的输出阻抗，并且每个输出匹配网络已经选择 相位长度，以减少输出阻抗的电抗。

公开(公告)号：US06781467B2

公开(公告)日：2004-08-24

申请号：US10351132

申请日：2003-01-24

Applicant: Bo Sun

Inventor： Bo Sun

IPC: H03F368

CPC classification number: H03F1/26 ,  H03F1/32 ,  H03F1/3223 ,  H03F3/68 ,  H03F2200/294 ,  H03F2200/372

Abstract: A feedforward nonlinearity cancellation scheme is used to improve the linearity of a low noise amplifier (LNA). An LNA incorporates a main amplifier and an auxiliary amplifier couple to receive the same input. The outputs of the main amplifier and the auxiliary amplifier are also coupled. The auxiliary amplifier may be implemented as a very low power auxiliary amplifier having a very low linearity. The output of the auxiliary amplifier contains third-order intermodulation (IM3) products that are of similar amplitude, but opposite phase, to the IM3 products generated by the main amplifier. With the outputs of the main amplifier and the auxiliary amplifier coupled, their respective IM3 products are summed together and effectively cancel each other out. As a result, the output of the LNA contains substantially no IM3 products, and the linearity of the LNA is substantially improved.

Abstract translation: 前馈非线性消除方案用于提高低噪声放大器（LNA）的线性度。 LNA集成了主放大器和辅助放大器耦合，以接收相同的输入。 主放大器和辅助放大器的输出也耦合。 辅助放大器可以被实现为具有非常低线性度的极低功率辅助放大器。 辅助放大器的输出包含与主放大器产生的IM3产品具有相似幅度但相反相位的三阶互调（IM3）产品。 随着主放大器和辅助放大器的输出耦合，它们各自的IM3产品相加在一起，并有效地相互抵消。 结果，LNA的输出基本上不含有IM3产物，并且LNA的线性度显着提高。

公开(公告)号：US06750721B2

公开(公告)日：2004-06-15

申请号：US10136926

申请日：2002-04-30

Applicant: Howard Patterson

Inventor： Howard Patterson

IPC: H03F368

CPC classification number: H03F3/211 ,  H03F1/302 ,  H03F3/19

Abstract: A power amplifier incorporates base ballasted hetero-junction bipolar transistors (HBTs) in parallel. A transistor pair adjusts the voltage applied to the base ballast if it senses that the voltage appearing between one of the HBT transistors and its base ballast is drooping to a level not strong enough to keep the HBTs active.

Abstract translation: 功率放大器并联并联基极镇流异质结双极晶体管（HBT）。 如果晶体管对感应到其中一个HBT晶体管和其基极镇流器之间出现的电压下降到不足以保持HBT有效的水平，则调整施加到基极镇流器的电压。

公开(公告)号：US06737922B2

公开(公告)日：2004-05-18

申请号：US10430461

申请日：2003-05-05

Applicant: Raymond Sydney Pengelly ,  Simon Maurice Wood

Inventor： Raymond Sydney Pengelly ,  Simon Maurice Wood

IPC: H03F368

CPC classification number: H03F1/0288 ,  H03F1/0277 ,  H03F1/32 ,  H03F3/602 ,  H03F2200/451 ,  H03F2201/3203

Abstract: An RF power amplifier circuit for amplifying an RF signal over a broad range of power with improved efficiency includes a carrier amplifier for amplifying an RF signal over a first range of power and with a power saturation level below the maximum of the broad range of power is disclosed. One or more peak amplifiers are connected in parallel with the carrier amplifier with each of the peak amplifiers being biased to sequentially provide an amplified output signal after the carrier amplifier approaches saturation. The input signal is applied through a signal splitter to the carrier amplifier and the plurality of peak amplifiers, and an output for receiving amplified output signals from the carrier amplifier and the plurality of peak amplifiers includes a resistive load R/2. The split input signal is applied through a 90° transformer to the carrier amplifier, and the outputs of the peak amplifiers are applied through 90° transformers to a output load. When operating below saturation, the carrier amplifier delivers power to a load of 2R when the carrier amplifier delivers current to the load, which is one-half the current at maximum power and the amplifier is saturated. The signal splitter can split the input signal power equally among the carrier and one or more peak amplifiers, or the input signal can be split unequally with the carrier amplifier receiving less input power than each of the peak amplifiers and vice versa.

Abstract translation: 一种RF功率放大器电路，用于在提高效率的宽范围的功率范围内放大RF信号，包括载波放大器，用于在第一功率范围内放大RF信号，并且功率饱和电平低于功率范围宽度的最大值 披露 一个或多个峰值放大器与载波放大器并联连接，其中每个峰值放大器被偏置以在载波放大器接近饱和之后依次提供放大的输出信号。 输入信号通过信号分离器施加到载波放大器和多个峰值放大器，并且用于从载波放大器和多个峰值放大器接收放大的输出信号的输出包括电阻负载R / 2。 分路输入信号通过90°变压器施加到载波放大器，峰值放大器的输出通过90°变压器施加到输出负载。 当运行低于饱和时，当载波放大器将电流传输到负载时，载波放大器将功率输送到2R的负载，负载是最大功率电流的一半，放大器饱和。 信号分离器可以在载波和一个或多个峰值放大器之间平均分割输入信号功率，或者输入信号可以与载波放大器不相等地分配，而不是每个峰值放大器接收较少的输入功率，反之亦然。

公开(公告)号：US06727761B1

公开(公告)日：2004-04-27

申请号：US10234595

申请日：2002-09-03

Applicant: Thomas R. Apel

Inventor： Thomas R. Apel

IPC: H03F368

CPC classification number: H03F3/191 ,  H03F1/302 ,  H03F2200/243 ,  H03F2203/21178

Abstract: Base ballast resistors used to control thermal runaway are each bypassed with a series-resonant inductor and capacitor pair. In some embodiments each inductor and capacitor pair is unique. In other embodiments a common inductor is used for each inductor and capacitor pair.

Abstract translation: 用于控制热失控的基本镇流电阻每个都使用串联谐振电感和电容对旁路。 在一些实施例中，每个电感器和电容器对是唯一的。 在其他实施例中，每个电感器和电容器对使用公共电感器。

公开(公告)号：US06529715B1

公开(公告)日：2003-03-04

申请号：US09259660

申请日：1999-02-26

Applicant: Stephen Douglas Kitko ,  Hans A. Kvinlaug ,  Richard Joseph Lisco ,  William A. Nitz

Inventor： Stephen Douglas Kitko ,  Hans A. Kvinlaug ,  Richard Joseph Lisco ,  William A. Nitz

IPC: H03F368

CPC classification number: H03F3/211 ,  H03F1/486 ,  H03F3/24

Abstract: A methodology is provided for processing carriers in a wireless application whereby the outputs of a multiplicity of modulated RF signal sources are combined into a single RF signal stream, that single RF signal stream being thereafter divided among the inputs of another multiplicity of RF power amplifiers. The outputs of that multiplicity of RF power amplifiers are then recombined, filtered and provided as an input to a transmission antenna.

Abstract translation: 提供了一种用于在无线应用中处理载波的方法，由此多个调制的RF信号源的输出被组合成单个RF信号流，该单个RF信号流此后在另一多个RF功率放大器的输入之间划分。 然后将多个RF功率放大器的输出重组，滤波并作为输入提供给发射天线。

公开(公告)号：US06489862B1

公开(公告)日：2002-12-03

申请号：US09678954

申请日：2000-10-03

Applicant: Michael L. Frank

Inventor： Michael L. Frank

IPC: H03F368

CPC classification number: H03F1/26 ,  H03F1/56 ,  H03F3/1935 ,  H03F2200/294 ,  H03F2200/372

Abstract: Receive band filtering between the last two stages of an N-stage power amplifier can reduce the Rx band noise. There are N−1 interstage matching networks interposing N stage amplifiers, where N≧2. The interstage matching networks and stage amplifiers are electrically connected in series. The N−1th interstage matching network includes a receive band reject filter positioned proximate to the output of the N−1th stage power amplifier.

Abstract translation: N级功率放大器的最后两级之间的接收频带滤波可以降低Rx频带噪声。 有N-1级间匹配网络插入N级放大器，其中N≥2。 级间匹配网络和级放大器串联电连接。 N-1级间匹配网络包括靠近N-1级功率放大器的输出端的接收带阻滤波器。

公开(公告)号：US06400227B1

公开(公告)日：2002-06-04

申请号：US09871446

申请日：2001-05-31

Applicant: Marc Goldfarb ,  Rosamaria Croughwell ,  Peter Katzin

Inventor： Marc Goldfarb ,  Rosamaria Croughwell ,  Peter Katzin

IPC: H03F368

CPC classification number: H03F1/223 ,  H03F3/72 ,  H03F2200/306 ,  H03G1/0017 ,  H03G1/0088

Abstract: A variable gain amplifier has at least two branches connected in parallel to drive a common output load. Each branch includes at least two FETs in a cascode configuration. A first FET in each branch is arranged to receive an input signal and to amplify the signal in a common source configuration; the second FET is arranged in a common gate configuration with its source receiving the output current of the first FET. The gate of the second FET is coupled to a corresponding gain control input so that the second FET is enabled when the gate receives an enabling gain control signal and disabled otherwise. Preferably the first and second FETs in each branch are biased in a saturation region of operation when the second FET is enabled by the gain control input. This maintains a low distortion figure throughout the dynamic range of the gain control. Preferably, the invention also includes an active fixed gain power amplification stage for coupling the output to a power amplifier.

Abstract translation: 可变增益放大器具有并联连接的至少两个分支以驱动公共输出负载。 每个分支包括至少两个共源共栅配置的FET。 每个分支中的第一FET被布置成接收输入信号并且以公共源配置放大信号; 第二FET被布置成共用栅极配置，其源极接收第一FET的输出电流。 第二FET的栅极耦合到相应的增益控制输入，使得第二FET在栅极接收到使能增益控制信号时使能，否则禁用。 优选地，当通过增益控制输入使能第二FET时，每个分支中的第一和第二FET被偏置在饱和操作区域中。 这在增益控制的整个动态范围内保持低失真。 优选地，本发明还包括用于将输出耦合到功率放大器的有源固定增益功率放大级。