CN106301251A - A kind of High Linear power amplifier structure based on feedback technique - Google Patents
A kind of High Linear power amplifier structure based on feedback technique Download PDFInfo
- Publication number
- CN106301251A CN106301251A CN201610662312.8A CN201610662312A CN106301251A CN 106301251 A CN106301251 A CN 106301251A CN 201610662312 A CN201610662312 A CN 201610662312A CN 106301251 A CN106301251 A CN 106301251A
- Authority
- CN
- China
- Prior art keywords
- power amplifier
- input
- output
- envelope
- amplifier tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title description 6
- 238000005516 engineering process Methods 0.000 claims abstract description 20
- 230000002238 attenuated effect Effects 0.000 claims abstract description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000004088 simulation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Amplifiers (AREA)
Abstract
本发明公开了一种基于反馈技术的高线性功率放大器结构，包括包络检测器一、输入匹配网络、主功率放大管及其辅助功率放大管、输出匹配网络、衰减网络、包络检测器二和误差放大器，主功率放大管及其辅助功率放大管用于放大射频输入的功率，输入匹配网络和输出匹配网络用于减小功率传递时的损耗，衰减网络用于衰减射频输出，包络检测器一用于检测射频输入的包络信号，包络检测器二用于检测衰减后射频输出的包络信号，误差放大器对两个包络信号的差值进行放大并反馈到辅助功率放大管的栅极。相比于传统的多栅晶体管功率放大器结构，所述高线性功率放大器的辅助功率放大管的栅极偏置是自适应的，在更宽的输入信号范围内可实现更高的线性度。
The invention discloses a high-linear power amplifier structure based on feedback technology, including an envelope detector 1, an input matching network, a main power amplifier tube and its auxiliary power amplifier tube, an output matching network, an attenuation network, and an envelope detector 2 And the error amplifier, the main power amplifier tube and its auxiliary power amplifier tube are used to amplify the power of the RF input, the input matching network and the output matching network are used to reduce the loss of power transfer, the attenuation network is used to attenuate the RF output, and the envelope detector One is used to detect the envelope signal of the RF input, and the second is used to detect the envelope signal of the attenuated RF output. The error amplifier amplifies the difference between the two envelope signals and feeds it back to the grid of the auxiliary power amplifier tube. pole. Compared with the traditional multi-gate transistor power amplifier structure, the grid bias of the auxiliary power amplifier tube of the high linearity power amplifier is self-adaptive, and higher linearity can be achieved in a wider input signal range.
Description
技术领域technical field
本发明涉及一种功率放大器结构，尤其涉及一种适用于无线发射机中的基于反馈技术的高线性功率放大器结构。The invention relates to a power amplifier structure, in particular to a feedback technology-based high linear power amplifier structure suitable for wireless transmitters.
背景技术Background technique
功率放大器中的晶体管工作在大信号状态，与小信号相比其非线性效应更为显著；同时随着高频谱效率的线性调制方式及多载波技术的广泛应用，使得调制信号功率峰均比越来越高，为了保证调制保真度及避免干扰相邻信道内通信系统的正常工作，对功率放大器的线性度提出了更高的要求。The transistor in the power amplifier works in a large signal state, and its nonlinear effect is more significant compared with the small signal; at the same time, with the wide application of the linear modulation method with high spectral efficiency and multi-carrier technology, the peak-to-average ratio of the modulated signal power is getting higher and higher. In order to ensure the modulation fidelity and avoid interference with the normal operation of the communication system in adjacent channels, higher requirements are put forward for the linearity of the power amplifier.
目前主流的功率放大器线性化技术有反馈、功率回退、前馈、预失真、非线性元件的线性放大(LINC)、包络消除和恢复(EER)。传统的反馈技术在高频时的环路增益较低，同时存在严重的稳定性问题，虽然可通过在环路中增加变频电路使得反馈环路工作在低频，但此时相移的控制成为了难点，同时也增加了电路的复杂性；功率回退技术较为简单且可靠，但其功率利用率很低且线性度改善有限；功率放大器的记忆效应使得预失真算法更为复杂；前馈、LINC和EER技术的电路结构相对复杂，且对两路信号或幅度和相位的匹配要求相当高。Currently mainstream power amplifier linearization techniques include feedback, power back-off, feedforward, predistortion, linear amplification of nonlinear components (LINC), and envelope elimination and restoration (EER). The loop gain of the traditional feedback technology is low at high frequencies, and there are serious stability problems at the same time. Although the feedback loop can be made to work at low frequencies by adding a frequency conversion circuit in the loop, the phase shift control has become a Difficulties, but also increase the complexity of the circuit; the power back-off technology is relatively simple and reliable, but its power utilization is very low and the linearity improvement is limited; the memory effect of the power amplifier makes the pre-distortion algorithm more complicated; feedforward, LINC The circuit structure of the EER technology is relatively complex, and the requirements for the matching of the two signals or the amplitude and phase are quite high.
传统的多栅晶体管功率放大器结构只能抵消恒定包络信号产生的AM-AM失真，对非恒定包络信号的线性度改善并不明显。The traditional multi-gate transistor power amplifier structure can only offset the AM-AM distortion produced by the constant envelope signal, and the improvement of the linearity of the non-constant envelope signal is not obvious.
发明内容Contents of the invention
发明目的：为了克服现有技术中存在的不足，本发明提供一种基于反馈技术的高线性功率放大器结构，通过利用输入包络信号和输出包络信号的差值反馈到辅助功率放大管的栅极偏置，使得输出信号包络能够跟随输入信号包络，同时能补偿主功率放大管在不同信号幅度时引起的增益损失，达到改善功率放大器线性度的目的。Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a high linear power amplifier structure based on feedback technology, by using the difference between the input envelope signal and the output envelope signal to feed back to the grid of the auxiliary power amplifier tube Extremely biased, so that the output signal envelope can follow the input signal envelope, and at the same time, it can compensate the gain loss caused by the main power amplifier tube at different signal amplitudes, so as to improve the linearity of the power amplifier.
技术方案：为实现上述目的，本发明采用的技术方案为：Technical scheme: in order to achieve the above object, the technical scheme adopted in the present invention is:
一种基于反馈技术的高线性功率放大器结构，包括包络检测器一、输入匹配网络、主功率放大管及其辅助功率放大管、输出匹配网络、衰减网络、包络检测器二和误差放大器，主功率放大管及其辅助功率放大管用于放大射频输入的功率，输入匹配网络和输出匹配网络用于减小功率传递时的损耗，衰减网络用于衰减射频输出，包络检测器一用于检测射频输入的包络信号，包络检测器二用于检测衰减后射频输出的包络信号，误差放大器对两个包络信号的差值进行放大并反馈到辅助功率放大管的栅极，使得射频输出的包络信号能够跟随射频输入的包络信号，同时通过辅助功率放大管补偿主功率放大管时刻变化的增益损失。A highly linear power amplifier structure based on feedback technology, including an envelope detector 1, an input matching network, a main power amplifier tube and its auxiliary power amplifier tube, an output matching network, an attenuation network, an envelope detector 2 and an error amplifier, The main power amplifier tube and its auxiliary power amplifier tube are used to amplify the power of the radio frequency input, the input matching network and the output matching network are used to reduce the loss during power transmission, the attenuation network is used to attenuate the radio frequency output, and the envelope detector is used to detect The envelope signal of the radio frequency input, the envelope detector 2 is used to detect the envelope signal of the radio frequency output after attenuation, the error amplifier amplifies the difference between the two envelope signals and feeds back to the gate of the auxiliary power amplifier tube, so that the radio frequency The output envelope signal can follow the envelope signal of the radio frequency input, and at the same time compensate the gain loss of the main power amplifier tube through the auxiliary power amplifier tube.
具体的，射频输入同时接入包络检测器一的输入端和输入匹配网络的输入端，射频输出从输出匹配网络的输出端接出；输入匹配网络的输出端同时连接主功率放大管的输入端和辅助功率放大管的输入端，主功率放大管的输出端和辅助功率放大管的输出端同时连接输出匹配网络的输入端，输出匹配网络的输出端同时连接负载和衰减网络的输出端，衰减网络的输出端连接包络检测器二的输入端，包络检测器一的输出端连接误差放大器的负输入端，包络检测器二的输出端连接误差放大器的正输入端，误差放大器的输出端连接辅助功率放大管的栅极。Specifically, the radio frequency input is connected to the input end of the envelope detector 1 and the input end of the input matching network at the same time, and the radio frequency output is connected to the output end of the output matching network; the output end of the input matching network is connected to the input of the main power amplifier tube at the same time end and the input end of the auxiliary power amplifier tube, the output end of the main power amplifier tube and the output end of the auxiliary power amplifier tube are connected to the input end of the output matching network at the same time, and the output end of the output matching network is connected to the output end of the load and the attenuation network at the same time, The output terminal of the attenuation network is connected to the input terminal of the envelope detector 2, the output terminal of the envelope detector 1 is connected to the negative input terminal of the error amplifier, the output terminal of the envelope detector 2 is connected to the positive input terminal of the error amplifier, and the The output end is connected to the grid of the auxiliary power amplifier tube.
具体的，考虑到功率放大管线性度和效率的折衷，对主功率放大管和辅助功率放大管的选择采取如下规定：所述主功率放大管工作于AB类，具有增益压缩特性；所述辅助功率放大管的栅极偏置由误差放大器的输出信号控制，一般工作于深B类或C类，具有增益扩展特性，辅助功率放大管的栅极偏置跟随射频输入的包络信号和衰减后射频输出的包络信号变化，从而使得辅助功率放大管能够补偿主功率放大管时刻变化的增益损失。Specifically, considering the compromise between the linearity and efficiency of the power amplifier tube, the following regulations are adopted for the selection of the main power amplifier tube and the auxiliary power amplifier tube: the main power amplifier tube works in class AB and has a gain compression characteristic; the auxiliary power amplifier tube The grid bias of the power amplifier tube is controlled by the output signal of the error amplifier. It generally works in the deep class B or C class and has the characteristics of gain expansion. The grid bias of the auxiliary power amplifier tube follows the envelope signal of the RF input and after attenuation The envelope signal of the radio frequency output changes, so that the auxiliary power amplifier tube can compensate the gain loss of the main power amplifier tube that changes from time to time.
具体的，所述衰减网络的衰减量为主功率放大管的线性增益，经衰减网络衰减后射频输出的包络信号与射频输入的包络信号的差值输入到误差放大器，经误差放大器放大后的差值反馈到辅助功率放大管的栅极，使得射频输出的包络信号能够跟随射频输入的包络信号。Specifically, the attenuation of the attenuation network is the linear gain of the main power amplifier tube, and the difference between the envelope signal output by the radio frequency and the envelope signal input by the radio frequency after attenuation by the attenuation network is input to the error amplifier, and after being amplified by the error amplifier The difference value is fed back to the gate of the auxiliary power amplifier tube, so that the envelope signal of the radio frequency output can follow the envelope signal of the radio frequency input.
本发明提出的基于反馈技术的高线性功率放大器结构，对于非恒定包络的输入信号而言，通过分别检测输入和衰减后的输出包络信号，并将其信号差送入误差放大器后反馈到辅助功率放大管的栅极，以此来控制辅助功率放大管的直流偏置，使得输出信号包络能够跟随输入信号包络，同时能补偿主功率放大管在不同信号幅度时引起的增益损失。本发明提出的基于反馈技术的高线性功率放大器结构，可有效补偿主功率放大管在较大输入信号范围内的一部分AM-AM失真，达到改善整体功率放大器线性度的目的。The high linearity power amplifier structure based on the feedback technology proposed by the present invention, for the input signal of the non-constant envelope, by detecting the input and the attenuated output envelope signal respectively, and sending the signal difference into the error amplifier and then feeding back to the The grid of the auxiliary power amplifier tube is used to control the DC bias of the auxiliary power amplifier tube, so that the output signal envelope can follow the input signal envelope, and at the same time, it can compensate the gain loss caused by the main power amplifier tube at different signal amplitudes. The high linear power amplifier structure based on the feedback technology proposed by the present invention can effectively compensate a part of the AM-AM distortion of the main power amplifier tube in a relatively large input signal range, so as to achieve the purpose of improving the linearity of the overall power amplifier.
有益效果：本发明提供的基于反馈技术的高线性功率放大器结构，与现有技术相比，具有以下优点：1、本发明通过利用输入信号包络和输出信号包络的差值来偏置辅助功率放大管，使得输出信号包络能够跟随输入信号包络，同时提高整体功率放大器的稳定性；2、本发明基于反馈技术，使得辅助功率放大管的栅极偏置电压随着输入和输出信号包络的变化而变化，从而补偿主功率放大管时刻变化的增益损失，改善整体功率放大器的线性度。Beneficial effects: the high linear power amplifier structure based on feedback technology provided by the present invention has the following advantages compared with the prior art: 1. The present invention uses the difference between the input signal envelope and the output signal envelope to bias the auxiliary Power amplifying tube, so that the output signal envelope can follow the input signal envelope, while improving the stability of the overall power amplifier; 2, the present invention is based on feedback technology, so that the grid bias voltage of the auxiliary power amplifying tube follows the input and output signal The change of the envelope changes, so as to compensate the gain loss of the main power amplifier tube changing at any time, and improve the linearity of the overall power amplifier.
附图说明Description of drawings
图1为本发明的基于反馈技术的高线性功率放大器的结构示意图；Fig. 1 is the structural representation of the highly linear power amplifier based on feedback technology of the present invention;
图2为本发明与传统结构的输出三阶交调点(OIP3)的仿真结果对比图，横坐标表示输入功率，纵坐标表示OIP3，单位均为dBm。Fig. 2 is the simulation result contrast figure of the output third-order intercept point (OIP3) of the present invention and traditional structure, abscissa represents input power, and ordinate represents OIP3, and the unit is dBm.
具体实施方式detailed description
下面结合附图对本发明作更进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings.
一种基于反馈技术的高线性功率放大器，包括包络检测器一、输入匹配网络、主功率放大管及其辅助功率放大管、输出匹配网络、衰减网络、包络检测器二和误差放大器，主功率放大管及其辅助功率放大管用于放大射频输入的功率，输入匹配网络和输出匹配网络用于减小功率传递时的损耗，衰减网络用于衰减射频输出，包络检测器一用于检测射频输入的包络信号，包络检测器二用于检测衰减后射频输出的包络信号，误差放大器对两个包络信号的差值进行放大并反馈到辅助功率放大管的栅极，使得射频输出的包络信号能够跟随射频输入的包络信号，同时通过辅助功率放大管补偿主功率放大管时刻变化的增益损失。A high linear power amplifier based on feedback technology, including envelope detector 1, input matching network, main power amplifier tube and its auxiliary power amplifier tube, output matching network, attenuation network, envelope detector 2 and error amplifier, the main The power amplifier tube and its auxiliary power amplifier tube are used to amplify the power of the radio frequency input, the input matching network and the output matching network are used to reduce the loss during power transmission, the attenuation network is used to attenuate the radio frequency output, and the envelope detector is used to detect radio frequency For the input envelope signal, the second envelope detector is used to detect the envelope signal of the RF output after attenuation. The error amplifier amplifies the difference between the two envelope signals and feeds it back to the gate of the auxiliary power amplifier tube, so that the RF output The envelope signal can follow the envelope signal of the radio frequency input, and at the same time compensate the gain loss of the main power amplifier tube through the auxiliary power amplifier tube.
如图1所示，射频输入同时接入包络检测器一的输入端和输入匹配网络的输入端，射频输出从输出匹配网络的输出端接出；输入匹配网络的输出端同时连接主功率放大管的输入端和辅助功率放大管的输入端，主功率放大管的输出端和辅助功率放大管的输出端同时连接输出匹配网络的输入端，输出匹配网络的输出端同时连接负载和衰减网络的输出端，衰减网络的输出端连接包络检测器二的输入端，包络检测器一的输出端连接误差放大器的负输入端，包络检测器二的输出端连接误差放大器的正输入端，误差放大器的输出端连接辅助功率放大管的栅极。As shown in Figure 1, the RF input is connected to the input end of the envelope detector 1 and the input end of the input matching network at the same time, and the RF output is connected to the output end of the output matching network; the output end of the input matching network is connected to the main power amplifier at the same time The input end of the tube and the input end of the auxiliary power amplifier tube, the output end of the main power amplifier tube and the output end of the auxiliary power amplifier tube are connected to the input end of the output matching network at the same time, and the output end of the output matching network is connected to the load and the attenuation network at the same time output end, the output end of the attenuation network is connected to the input end of the envelope detector two, the output end of the envelope detector one is connected to the negative input end of the error amplifier, and the output end of the envelope detector two is connected to the positive input end of the error amplifier, The output end of the error amplifier is connected to the grid of the auxiliary power amplifier tube.
一般来说，考虑到功率放大管线性度和效率的折衷，主功率放大管工作于AB类，具有增益压缩特性，会产生AM-AM失真和AM-PM失真；为了消除这些失真，传统的方法是采用多栅晶体管结构，即为主功率放大管并联一个固定偏置的辅助功率放大管，该固定偏置的辅助功率放大管一般工作于深B类或C类，表现出增益扩展特性，从而在一定程度上消除一部分AM-AM失真，但是这只能抵消恒定包络信号引起的幅度失真，对于非恒定包络信号，该方法对线性度的改善并不高。Generally speaking, considering the compromise between the linearity and efficiency of the power amplifier tube, the main power amplifier tube works in class AB and has gain compression characteristics, which will produce AM-AM distortion and AM-PM distortion; in order to eliminate these distortions, the traditional method It adopts a multi-gate transistor structure, that is, the main power amplifier tube is connected in parallel with a fixed-biased auxiliary power amplifier tube. The fixed-biased auxiliary power amplifier tube generally works in deep class B or class C, showing gain expansion characteristics, thus To a certain extent, part of the AM-AM distortion is eliminated, but this can only offset the amplitude distortion caused by the constant envelope signal. For non-constant envelope signals, this method does not improve the linearity very much.
本发明与传统结构不同的是，辅助功率放大管的栅极偏置电压是自适应的，由输入信号和输出信号共同决定，使得输出信号包络能够跟随输入信号包络，同时能补偿主功率放大管在不同信号幅度时引起的增益损失。The difference between the present invention and the traditional structure is that the grid bias voltage of the auxiliary power amplifier tube is self-adaptive, determined by the input signal and the output signal, so that the output signal envelope can follow the input signal envelope, and at the same time it can compensate the main power The gain loss caused by the amplifier tube at different signal amplitudes.
如图2为晶体管尺寸对应的情况下，仿真得到的本发明提出的基于反馈技术的高线性功率放大器结构与传统的固定栅偏置的辅助功率放大管的多栅晶体管结构的输出三阶交调点(OIP3)随输入信号功率的变化曲线。从仿真结果可以看出，当输入信号功率不太大时，本发明提出的结构的OIP3明显大于传统结构的OIP3。As shown in Figure 2, under the corresponding situation of transistor size, the output third-order intermodulation of the multi-gate transistor structure of the high linear power amplifier structure based on feedback technology proposed by the present invention and the traditional fixed gate bias auxiliary power amplifier tube obtained by simulation Point (OIP3) vs. input signal power. It can be seen from the simulation results that when the input signal power is not too large, the OIP3 of the structure proposed by the present invention is obviously greater than that of the traditional structure.
综上所述，本发明基于反馈技术，通过利用输入信号包络和输出信号包络的差值来偏置辅助功率放大管，使得输出信号包络能够跟随输入信号包络，同时能够补偿主功率放大管时刻变化的增益损失，极大的提高了整体功率放大器的线性度和稳定性。In summary, the present invention is based on the feedback technology, by using the difference between the input signal envelope and the output signal envelope to bias the auxiliary power amplifier tube, so that the output signal envelope can follow the input signal envelope, and at the same time can compensate the main power The gain loss of the amplifier tube changes from time to time, which greatly improves the linearity and stability of the overall power amplifier.
以上所述仅是本发明的优选实施方式，应当指出：对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662312.8A CN106301251A (en) | 2016-08-12 | 2016-08-12 | A kind of High Linear power amplifier structure based on feedback technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662312.8A CN106301251A (en) | 2016-08-12 | 2016-08-12 | A kind of High Linear power amplifier structure based on feedback technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106301251A true CN106301251A (en) | 2017-01-04 |
Family
ID=57669692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610662312.8A Pending CN106301251A (en) | 2016-08-12 | 2016-08-12 | A kind of High Linear power amplifier structure based on feedback technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106301251A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167577A (en) * | 2018-08-30 | 2019-01-08 | 复旦大学 | Low-noise amplifier with envelope detected function |
| CN115291667A (en) * | 2021-12-22 | 2022-11-04 | 夏芯微电子(上海)有限公司 | Wireless communication device and adaptive bias voltage adjusting circuit |
| CN119813976A (en) * | 2025-03-07 | 2025-04-11 | 深圳飞骧科技股份有限公司 | A radio frequency power amplifier and a radio frequency chip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1518793A (en) * | 2001-04-23 | 2004-08-04 | ����ɭ�绰�ɷ�����˾ | Automatic optimization of linearity for envelope feedback amplifier linearization |
| CN1855698A (en) * | 2004-12-13 | 2006-11-01 | 株式会社东芝 | A doherty amplifier and signal processing method thereof |
-
2016
- 2016-08-12 CN CN201610662312.8A patent/CN106301251A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1518793A (en) * | 2001-04-23 | 2004-08-04 | ����ɭ�绰�ɷ�����˾ | Automatic optimization of linearity for envelope feedback amplifier linearization |
| CN1855698A (en) * | 2004-12-13 | 2006-11-01 | 株式会社东芝 | A doherty amplifier and signal processing method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167577A (en) * | 2018-08-30 | 2019-01-08 | 复旦大学 | Low-noise amplifier with envelope detected function |
| CN109167577B (en) * | 2018-08-30 | 2022-04-12 | 复旦大学 | Low Noise Amplifier with Envelope Detection |
| CN115291667A (en) * | 2021-12-22 | 2022-11-04 | 夏芯微电子(上海)有限公司 | Wireless communication device and adaptive bias voltage adjusting circuit |
| CN115291667B (en) * | 2021-12-22 | 2023-08-25 | 夏芯微电子(上海)有限公司 | Wireless communication device and adaptive bias voltage adjustment circuit |
| CN119813976A (en) * | 2025-03-07 | 2025-04-11 | 深圳飞骧科技股份有限公司 | A radio frequency power amplifier and a radio frequency chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100578922C (en) | High efficiency power amplifier | |
| KR102131002B1 (en) | Envelope tracking power transmitter using common-gate voltage modulation linearizer | |
| CN103715997B (en) | A kind of circuit for improving power amplifier linearity | |
| CN103023440B (en) | Circuit for improving linearity of power amplifier | |
| CN106452377B (en) | A kind of radio-frequency power amplifier of adaptive equalization | |
| CN100555843C (en) | Linear power amplification circuit and method based on analog predistortion | |
| CN102299689B (en) | High-efficiency double-frequency power amplifier design method based on envelop following technology | |
| KR101128487B1 (en) | Power amplifier linearization method and apparatus | |
| CN107579716B (en) | Linear Power Amplifier Based on Analog Cancellation | |
| CN102710222B (en) | Linear signal conditioning driving device for traveling wave tube | |
| US20150188500A1 (en) | Power amplifier | |
| US10951172B2 (en) | Linear doherty power amplifier | |
| CN108134583B (en) | An error negative feedback linearized power amplifier device and method | |
| CN103107778A (en) | Doherty power amplifier capable of reducing third order intermodulation and modulating method thereof | |
| CN102545796B (en) | Traveling wave tube linearizer | |
| CN102291091B (en) | Linear microwave power amplifier | |
| CN106301251A (en) | A kind of High Linear power amplifier structure based on feedback technique | |
| CN101247154B (en) | System and method for implementing mutual compensation between despicking and digital predistortion | |
| CN102098247A (en) | High-efficiency high-linearity repeater system and realizing method of high-efficiency high-linearity thereof | |
| CN110557095B (en) | Method and device for improving linear efficiency of power amplifier | |
| CN202713234U (en) | Broadband adapting radio-frequency power amplification device | |
| CN111049480A (en) | Method and device for improving linear efficiency of Doherty power amplifier | |
| CN112448676A (en) | Linear efficient multi-combination power amplifier based on harmonic impedance matching | |
| CN204216853U (en) | Dual-channel analog pre-distorting power amplifier | |
| KR20150000966A (en) | Asymmetric Doherty Amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |