If we simply back-off the input signal to achieve the linearity required for the power amplifier, the power amplifier efficiency will be very low for high PAR signals.
虽然通过功率回退，可以得到较好的线性度，但是对于峰均比高的信号而言，效率就会很低。
Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
轮廓调制结合了一种相位调制信号的波形和放大器的输出阻抗，可在某个较大型输出电源关闭后保持更高的效率。
When supply modulation and contour modulation are working in concert, the dynamic range and efficiency of the power amplifier can be further improved.
当电源调制和轮廓调制协同工作时，功率放大器的动态范围和效率可以进一步提高。
Linearization and efficiency enhancement techniques of power amplifier can be adopted to improve the linearity and power efficiency of the transmitter.
于是功率放大器的线性化以及提高效率的技术被采用来改善发射器的线性度和效率。
Finally, the author analyzes the possibility to cut down power waste of amplifier further, improve the efficiency and reliability, decrease the volume of power amplifier.
最后，分析了进一步降低功率放大器的功耗、提高效率、提高可靠性，减小功放体积的可能性。
The term "efficiency" refers to the ability of a speaker system to convert electrical energy (power from the amplifier) into acoustic output.
术语“效率”是指扬声器系统将电能（功放的推力）转化为声音输出的能力。
The coupling efficiency of the amplifier and the factors affecting the output power improvement are investigated.
研究光纤放大器的耦合效率以及影响输出功率的因素。
Application of predistortion technology in CDMA2000 system is discussed in this paper. And a practical digital predistortion system is proposed to improve linearity and efficiency of power amplifier.
本文研究了预失真技术在CD MA2000系统中的应用，设计了一种实用的数字预失真系统来提高功率放大器的线性度和效率。
High efficiency and high linearity space traveling wave tube (TWT) is required for satellite communication system as a high power, high gain microwave amplifier.
作为卫星通讯系统所用的高增益、高功率微波放大器件，行波管的效率和线性是非常重要的。
For solving this problem, various linearization techniques have been employed to improve the linearity of high efficiency power amplifier.
要解决这个问题，必须采用线性化技术来改善高效率功率放大器的非线性特性。
The noise, gain saturation and pump power conversation efficiency of bidirectionally pumped Raman fiber amplifier (RFA) are investigated in detail.
对双向抽运拉曼光纤放大器（RFA）的噪声特性、增益饱和及抽运功率转换效率进行了详细研究。
The traditional power meter calibrating system usually has the shortcomings of low efficiency and large volume due to its standard voltage and current source rely on the analog amplifier.
传统的电力校表台由模拟功放向待校电表及标准表提供校表电流，造成系统效率低、体积大、重量重。
While it had excellent sound quality, the low efficiency of the power amplifier unit made commercialization difficult.
尽管它有非常出色的音质，但是由于功率利用率低的问题，商业化是比较困难的。
The characteristics of FEM amplifier with elliptical guide, such as the evolutin of power, efficiency and bandwidth, are analyzed. These results are useful to design FEM devices.
利用该程序研究了椭圆波导FEM放大器的输出功率、效率、带宽等高频特性，并对不同椭圆度的椭圆波导FEM放大器的性能进行了计算、对比分析。
In order to improve both charge current and transfer efficiency via a lower coupling coefficient inductive link, class E power amplifier based on primary leakage inductance and compensat.
在低耦合系数条件下 ，通过基于初级漏感的E类功率放大器和次级漏感的补偿方法 ，提高电容充电电流和传输效率。
Linearizeation technology is now widely used in order to reduce the power amplifier nonlinear distortion without loss of efficiency.
为了在不损失效率的条件下降低功率放大器的非线性失真现在广泛采用了线性化技术。
This thin-style high-power amplifier with versatile charm featured the definitive high-efficiency class A amplifier, the HCA circuit.
这款是全能高效率的A类放大，薄型高功率功放。
Without the minimum output power requirement in the main output just as magnetic amplifier, higher efficiency can be achieved in this circuit.
和磁开关不同，该变流器在主反馈输出上没有最小输出负载的要求，从而电路可以达到更高的效率。
The efficiency of the cascode power amplifier can be boosted by use of cascode-inductance.
利用共源共栅电感可以提高共源共栅结构功率放大器的效率。
Theory analysis and experiments prove that such tri-state power amplifier has a series of advantages such as: little current wave, slight electromagnetic interference, high efficiency and so on.
理论分析和试验表明，该功率放大器具有电流纹波小、电磁干扰小、效率高等优点。
AT89S52 as a display module to control the core of achieving power amplifier output power, DC power supply of power and machine efficiency, for display.
AT 89s52作为显示模块的控制核心，实现功率放大器输出功率、直流电源的供给功率和整机效率功能的显示。
If the efficiency of servo amplifier is considered, it is practicable that the power supply voltage is about 3 times as large as the servo amplifier output voltage corresponding to rated current.
若考虑伺服放大器效率及电源功率等因素，伺服放大器电源电压应取额定输出电流所对应的伺服放大器输出电压的3倍左右为宜。
Pointed out that it is a very important subject to look for the advanced, high-efficiency, useable, stable, reliable high linear power amplifier of UHF TVtransmitter by now.
寻求先进、高效、实用、稳定、可靠的UHF电视发射机高频线性功率放大器，至今仍是一个十分重要的技术课题。
The primary function of RF power amplifier is to amplify the RF singal with high efficiency.
射频功率放大器的主要功用是放大射频信号，并且以高效率输出大功率为目的。
The requirements are: the change of output signal is consistent with input signal, namely, low distortion; and the loss of the power amplifier is low, namely, high efficiency.
功率放大器两个基本要求：一是输出信号变化能够与输入信号的变化相一致，即：系统失真小：二是整个功率放大器的损耗低，即：系统效率高。
Materials with light amplification is a main part of fiber amplifier, which determine the power efficiency of fiber amplifier.
光放大材料是光纤放大器的主要组成部分，它决定光纤放大器的光放大功率。
The main function of the power amplifier is to get the highest output power at high efficiency.
功率放大器的主要目的是以高效率得到大的输出功率。
It is proposed to make a high power solid laser amplifier tentative design in the paper, which is going to have great energy utilization efficiency and strong output.
本文力求设计出一种高能量固体激光放大器方案，它要具有很高的能量利用效率以及输出光强。
Materials with light amplification is a main part of light amplifier, which determine the power efficiency and flat gain bandwidth of light amplifier.
光放大材料是光放大器的重要组成部分，它决定光放大器的光放大功率及平坦增益带宽。
Materials with light amplification is a main part of light amplifier, which determine the power efficiency and flat gain bandwidth of light amplifier.
光放大材料是光放大器的重要组成部分，它决定光放大器的光放大功率及平坦增益带宽。
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