公开(公告)号：US20040257156A1

公开(公告)日：2004-12-23

申请号：US10865667

申请日：2004-06-10

发明人： Edoardo Botti ,  Fabio Cagnetti

IPC分类号： H03F003/68

CPC分类号： H03F3/72 ,  H03F1/0277 ,  H03F1/3211 ,  H03F3/68

摘要： A multi-channel power amplifier for driving a plurality of loads, each associated to a respective channel, each channel comprising a pair of operational amplifiers, first and second, one operational amplifier of each channel being connectable through switches either in a bridge configuration with the other operational amplifier or in single-ended configuration to a constant reference voltage for driving the load of the respective channel, the amplifier comprises circuit means for comparing the signal level of the channels with at least a threshold and outputting a logic control signal for the switches. A relative method of controlling a power amplifier that allows a sensible reduction of distortion at the price of a negligible increase of dissipated power is disclosed.

摘要翻译： 一种用于驱动多个负载的多通道功率放大器，每个负载与相应的通道相关联，每个通道包括一对运算放大器，每个通道的第一和第二个运算放大器可通过桥接配置中的开关连接， 其它运算放大器或单端配置为恒定的参考电压，用于驱动相应通道的负载，该放大器包括电路装置，用于将通道的信号电平与至少一个阈值进行比较，并输出开关的逻辑控制信号 。 公开了一种控制功率放大器的相对方法，其允许以可忽略的耗散功率增加的价格明显地减少失真。

公开(公告)号：US20040201424A1

公开(公告)日：2004-10-14

申请号：US10753721

申请日：2004-01-08

发明人： Dow-Chih Niu ,  Chia-Yang Chen

IPC分类号： H03F003/68

CPC分类号： H03F1/086 ,  H03F3/68 ,  H03F2200/294 ,  H03F2200/372

摘要： A single-power-supply Idss-bias RF amplifier is disclosed, which is composed by the first and second stages Amplifier. The two stages have the same circuit topology except the matching circuits. The source terminal of amplifier is grounded directly to reduce the parasitic effect from the bias circuit. It will increase the stability of the RF amplifier and avoid the oscillation. The lossy matching circuits and eliminating resonator circuit are designed to make the RF amplifier unconditional stable. A variable resister is put into to adjust the D.C. voltage on drain terminal. The current of amplifier could be controlled in reasonable range. High gain and quit low noise have been obtained.

摘要翻译： 公开了由第一和第二级放大器组成的单电源Idss偏置RF放大器。 除了匹配电路之外，两级具有相同的电路拓扑。 放大器的源极端子直接接地，以减少偏置电路的寄生效应。 这将增加RF放大器的稳定性，避免振荡。 有损匹配电路和消除谐振电路设计使得RF放大器无条件稳定。 放置一个可变电阻来调节漏极端子的直流电压。 放大器的电流可以控制在合理的范围内。 获得了高增益和低噪声。

公开(公告)号：US20040150473A1

公开(公告)日：2004-08-05

申请号：US10360028

申请日：2003-02-05

申请人： SIRENZA MICRODEVICES, INC

发明人： Gregg Alan Hollingsworth ,  Khalid Paul Shallal ,  Dean T. Muellenberg

IPC分类号： H03F003/68

CPC分类号： H03F3/602 ,  H03F1/30 ,  H03F1/32 ,  H03F2200/468

摘要： An apparatus for improving linearity of an RF signal comprising: (a) a splitter configured to receive an input RF signal, and configured to split the input RF signal into two RF signals comprising a first input RF signal, and a second input RF signal; (b) an over-biased non-linear RF power amplifier configured to receive the first input RF signal and configured to generate an over-biased non-linear output signal having an over-biased non-linear distortion component; (c) an under-biased non-linear RF power amplifier configured to receive the second input RF signal and configured to generate an under-biased non-linear output signal having an under-biased non-linear distortion component; and (d) a combiner configured to combine the over-biased non-linear output signal and the under-biased non-linear output signal, and configured to output the RF signal having substantially cancelled over-biased and under-biased distortion components. The over-biased non-linear RF power amplifier is configured to receive an over-biased DC signal being greater than an optimum bias DC voltage. The under-biased non-linear RF power amplifier is configured to receive an under-biased DC signal being lower than the optimum bias DC voltage.

摘要翻译： 一种用于改善RF信号的线性度的装置，包括：（a）分配器，被配置为接收输入RF信号，并且被配置为将输入RF信号分成包括第一输入RF信号和第二输入RF信号的两个RF信号; （b）过偏置非线性RF功率放大器，被配置为接收第一输入RF信号并被配置为产生具有过偏置非线性失真分量的过偏置非线性输出信号; （c）欠偏置非线性RF功率放大器，被配置为接收所述第二输入RF信号并被配置为产生具有欠偏置非线性失真分量的欠偏置非线性输出信号; 以及（d）组合器，其被配置为组合过偏置非线性输出信号和欠偏置非线性输出信号，并且被配置为输出具有基本上消除的过偏置和欠偏置失真分量的RF信号。 过偏置非线性RF功率放大器被配置为接收大于最佳偏置DC电压的过偏置DC信号。 欠偏置非线性RF功率放大器被配置为接收低于最佳偏压DC电压的欠偏置DC信号。

公开(公告)号：US20040135638A1

公开(公告)日：2004-07-15

申请号：US10745688

申请日：2003-12-29

申请人： Broadcom Corporation

发明人： Frank W. Singor ,  Arya R. Behzad

IPC分类号： H03F003/68

CPC分类号： H03F3/45183 ,  H03F3/45381 ,  H03F3/45475 ,  H03F2200/516 ,  H03F2203/45392 ,  H03F2203/45651 ,  H03F2203/45652 ,  H03F2203/45682 ,  H03F2203/45696 ,  H03F2203/45702

摘要： A circuit and method for bridging an analog signal between two integrated circuits operating at different supply voltages. The circuit is a two stage fixed gain amplifier. The first stage is a transconductance amplifier and the second stage is an operational amplifier. The first stage converts an input signal from a voltage into a current. The second stage converts the current signal to an output voltage signal.

公开(公告)号：US20040130392A1

公开(公告)日：2004-07-08

申请号：US10695042

申请日：2003-10-28

发明人： Noriaki Saito

IPC分类号： H03F003/68

CPC分类号： H03F3/68 ,  H03F1/223 ,  H03F1/26 ,  H03F3/189 ,  H03F3/4508 ,  H03F3/45089 ,  H03F3/45094 ,  H03F2200/111 ,  H03F2200/372 ,  H03F2200/429 ,  H03F2203/45566

摘要： In a multi-band amplifier, provided are a first differential voltage-to-current converting circuit for converting a first frequency signal into a current and outputting the current, a second differential voltage-to-current converting circuit for converting a second frequency signal into a current and outputting the current, and a current transposition point connected in phase with and in parallel with output terminals of the first and second differential voltage-to-current converting circuits. A base-grounded amplifying circuit is connected in phase with and in series with an output terminal of the current transposition point. With this configuration, the circuit of a virtual ground point and the following of after voltage-to-current conversion can be provided in common by using a cascode amplifier as a low-noise amplifier, making it possible to constitute a multi-band amplifier minimized in the connection loss resulting from interconnection.

摘要翻译： 在多频带放大器中，提供了用于将第一频率信号转换为电流并输出电流的第一差分电压 - 电流转换电路，用于将第二频率信号转换成第二频率信号的第二差分电压 - 电流转换电路 电流并输出电流，以及与第一和第二差分电压 - 电流转换电路的输出端相同相并联并联的当前转置点。 基极接地放大电路与当前转置点的输出端相同相并串联连接。 利用这种配置，可以通过使用共源共栅放大器作为低噪声放大器来共同地提供虚拟接地点的电路和以后的电压 - 电流转换之后的电路，使得可以构成多频带放大器最小化 在互连造成的连接损失。

公开(公告)号：US20040113687A1

公开(公告)日：2004-06-17

申请号：US10649321

申请日：2003-08-26

发明人： Ulrich Theus ,  Juergen Kessel

IPC分类号： H03F003/68

CPC分类号： H03F1/083 ,  H02M3/073 ,  H03F1/305

摘要： A two-stage amplifier includes a first stage and a second stage that are DC-connected through a coupling capacitor Cp. A charge pump generates a bias voltage Vp that is applied across the coupling capacitor Cp leads to maintain the time average of the voltage across said coupling capacitor constant.

摘要翻译： 两级放大器包括通过耦合电容器Cp直流连接的第一级和第二级。 电荷泵产生施加在耦合电容器Cp引线两端的偏置电压Vp，以保持所述耦合电容器两端的电压的时间平均值恒定。

公开(公告)号：US20040104776A1

公开(公告)日：2004-06-03

申请号：US10691682

申请日：2003-10-22

申请人： NEC Electronics Corporation

发明人： Shiro Tsunai

IPC分类号： H03F003/68

CPC分类号： H03F1/12 ,  H03F3/345

摘要： A voltage amplification circuit is provided which is capable of faithfully amplifying an input signal even in an inverting amplifier placed in a second stage being DC-coupled to an inverting amplifier placed in a first stage. By DC-coupling the inverting amplifiers and by setting an amplifying operation starting input voltage in the inverting amplifier placed in the first stage to be lower than that in the inverting amplifier placed in the second stage, the voltage amplification circuit that can provide a large amplification factor is realized. By configuring so that a circuit to set a clamping voltage has substantially the same configurations as a circuit to set an amplifying operation starting input voltage in the inverting amplifier placed in the second stage, the voltage amplification circuit is obtained that can follow variations in parameters on manufacturing and provide a wide operating margin and operate in a stable manner even though variations in parameters on manufacturing or variations in a source voltage occur.

摘要翻译： 提供了一种电压放大电路，其能够忠实地放大输入信号，即使在放置在与第一级放置的反相放大器相连的第二级中的反相放大器中也是如此。 通过将反相放大器进行直流耦合，并且通过将放置在第一级的反相放大器中的放大操作开始输入电压设置为低于放置在第二级的反相放大器中的放大操作，可以提供大放大的电压放大电路 因素实现。 通过配置使得设置钳位电压的电路具有与设置放置在第二级的反相放大器中的放大操作开始输入电压的电路基本相同的配置，获得可以遵循参数变化的电压放大电路 制造和提供宽的操作裕度并且以稳定的方式操作，即使制造中的参数的变化或源电压的变化发生。

公开(公告)号：US20040095190A1

公开(公告)日：2004-05-20

申请号：US10039936

申请日：2001-10-31

发明人： Jonathan Klaren ,  Charles J. Persico ,  Scott Walter ,  Paul L. Chan

IPC分类号： H03F003/68

CPC分类号： H03F3/602 ,  H03F3/72 ,  H03F2200/198

摘要： A balanced power amplifier circuit arrangement comprises a driver amplifier stage (22) adapted to receive and amplify a signal. The amplified signal is input to a first coupler (26). The first coupler (26) produces an in-phase signal and an out-of-phase quadrature signal. A first power amplifier (38) receives and amplifies the in-phase signal. A second power amplifier (40) receives and amplifies the out-of-phase signal. A first switch (28) alternately connects an isolated port of the first coupler to ground (32) or a bypass path (36). A second coupler (42) receives and combines the amplified in-phase signal and the amplified out-of-phase signal to produce a combined signal. A second switch (30) alternately connects an isolated port of the second coupler (42) to either ground (34) or the bypass path (36). When the power amplifiers (38, 40) are powered down, the first coupler (26) splits the RF-signal into an in-phase signal and an out-of-phase signal. The power amplifiers (38, 40) appear as reflective impedances to the signal when they are powered down. Each signal reflects off the first and second power amplifiers (38, 40), respectively. The first coupler (26) combines the reflected signals and routes the combined signal through the bypass path (36) to the second coupler (42). The second coupler (42) splits the signal into an in-phase and out-of-phase signal and routes each to the power amplifiers (38, 40). The power amplifiers (38, 40) reflect each signal back to the second coupler (42). The second coupler (42) combines the signals and routes the combined signal to the RF-output port. The circuit arrangement enables the integration of the balanced amplifier and first and second couplers (26, 42) into a single power amplifier package to provide low power bypassing without the need of an external circulator component.

摘要翻译： 平衡功率放大器电路装置包括适于接收和放大信号的驱动放大器级（22）。 放大的信号被输入到第一耦合器（26）。 第一耦合器（26）产生同相信号和异相正交信号。 第一功率放大器（38）接收并放大同相信号。 第二功率放大器（40）接收并放大异相信号。 第一开关（28）将第一耦合器的隔离端口交替地连接到地（32）或旁路路径（36）。 第二耦合器（42）接收并组合放大的同相信号和放大的异相信号以产生组合信号。 第二开关（30）将第二耦合器（42）的隔离端口交替地连接到接地（34）或旁路路径（36）。 当功率放大器（38,40）断电时，第一耦合器（26）将RF信号分为同相信号和异相信号。 当功率放大器断电时，功率放大器（38,40）显示为信号的反射阻抗。 每个信号分别反射第一和第二功率放大器（38,40）。 第一耦合器（26）组合反射信号并将组合的信号通过旁通路径（36）传送到第二耦合器（42）。 第二耦合器（42）将信号分离成同相和异相信号，并将每个信号路由到功率放大器（38,40）。 功率放大器（38,40）将每个信号反射回第二耦合器（42）。 第二耦合器（42）组合信号并将组合信号路由到RF输出端口。 该电路装置能够将平衡放大器和第一和第二耦合器（26,42）集成到单个功率放大器封装中，以提供低功率旁路，而不需要外部循环器组件。

公开(公告)号：US20040085134A1

公开(公告)日：2004-05-06

申请号：US10692232

申请日：2003-10-23

发明人： Jonathan Paul Griffith ,  Brittin C. Kane ,  Michael W. Trippe

IPC分类号： H03F003/68

CPC分类号： H03F3/602 ,  H03F1/0288

摘要： The present innovation is directed to a single-chip integrated circuit power amplifier configured to employ the efficiency enhancement techniques utilized in Doherty amplifiers. The single-chip integrated circuit power amplifier may be implemented using uniquely designed biasing circuits as described herein. Also, the use of combined HBT/FET processes and a lumped quarter-wavelength transformer may be inherently well suited for the implementation of Doherty amplifiers in the single-chip techniques described herein.

摘要翻译： 本发明涉及一种配置成采用Doherty放大器中使用的效率增强技术的单芯片集成电路功率放大器。 单芯片集成电路功率放大器可以使用如本文所述的独特设计的偏置电路来实现。 此外，使用组合的HBT / FET工艺和集总四分之一波长的变压器本来可以很好地适用于本文描述的单芯片技术中的Doherty放大器的实现。

公开(公告)号：US20030222709A1

公开(公告)日：2003-12-04

申请号：US10351225

申请日：2003-01-24

申请人： Song-Gang KIM ,  Techno Electronics Industries Co., Ltd.

发明人： Song-Gang Kim

IPC分类号： H03F001/14 ,  H03F003/68

CPC分类号： H03F1/56 ,  H03F1/0277 ,  H03F2203/7233 ,  H03F2203/7236

摘要： The present invention discloses a high efficiency power amplifier comprising: an input matching unit for matching input signal; a first amplifying means for amplifying the signal outputted from the input matching unit; a second amplifying means for amplifying the signal outputted from the input matching unit; an output matching unit for performing an impedance matching the amplified signal from the first and second amplifying means and outputting the matched signal through an output terminal; a first power control path for electrically connecting between the input matching unit and the output matching unit and including the first amplifying means; a second power control path for electrically connecting between the input matching unit and the output matching unit and including the second amplifying means; a bypass path for electrically connecting between the input matching unit and the output matching unit; and a control circuit unit for selectively outputting the predetermined path control signals to the first and second amplifying means on the basis of an antennal output signal outputted and applied from a predetermined control module like an MSM (Mobile Station Modem).

摘要翻译： 本发明公开了一种高效率功率放大器，包括：输入匹配单元，用于匹配输入信号; 第一放大装置，用于放大从输入匹配单元输出的信号; 第二放大装置，用于放大从输入匹配单元输出的信号; 输出匹配单元，用于执行与来自第一和第二放大装置的放大信号匹配的阻抗，并通过输出端输出匹配信号; 第一功率控制路径，用于电连接输入匹配单元和输出匹配单元，并且包括第一放大装置; 第二功率控制路径，用于电连接输入匹配单元和输出匹配单元，并包括第二放大装置; 旁路路径，用于电连接输入匹配单元和输出匹配单元; 以及控制电路单元，用于根据从诸如MSM（移动站调制解调器）的预定控制模块输出和施加的天线输出信号，有选择地将预定路径控制信号输出到第一和第二放大装置。