This paper introduces several dielectric foil switches , analyzes their characteristics in respect of the output pulse shape , switch mechanism and output impedance etc 摘要介绍了国内外几种绝缘薄膜开关，从开关的结构、对应的输出方波波形和输出阻抗等几个方面进行了比较，分析了其各自的优缺点。
The formulae for input impedance , output impedance and main magnetic flux are derived . the influence of resistance , induction and voltage ration to output impedance of transformer are discussed 摘要导出了变压器输入阻抗、输出阻抗、主磁通的计算公式，讨论了电阻、电感以及变比对变压器输出阻抗的影响。
The use of this instrument by both engineering and production permits quick and accurate characterization of the input and output impedance , gain , reverse isolation of individual units and the degree of match between units 工程以及产品通过使用这种仪器可以迅速准确的获得输入/输出阻抗、增益、独立单元的反向隔离以及两个单元之间的匹配程度。
The condition that exists when two coupled circuits are adijusted so that the outp - ut impedance of one circuit equals the input impedance of the other circit connec - ted to the first , there is a minimum power loss between two circuits 指一个存在的条件，当调整两个偶合电路使得其中一电路的输出阻抗与另一电路的输入阻抗相等进称之，当他们连接的阻抗相等时，两电路间的能量损失最低。
If the speaker needs more current ( its overall impedance drops ) then a lower amplifier output impedance will allow that current to be drawn out of the amplifier without causing much of a change in the applied voltage - and that means less distortion 如果扬声器需要更大电流（扬声器的整体阻抗降低） ，那么一个低输出阻抗的放大器可以容许在输出相应电流的同时，所施加的电压变化更小，这也意味着失真更小。
If the speaker needs more current ( its overall impedance drops ) then a lower amplifier output impedance will allow that current to be drawn out of the amplifier without causing much of a change in the applied voltage - and that means [ i ] less [ / i ] distortion 如果扬声器需要更大电流（扬声器的整体阻抗降低） ，那么一个低输出阻抗的放大器可以容许在输出相应电流的同时，所施加的电压变化更小，这也意味着失真更小。
It helps when an amplifier has a high damping factor ( in other words , a low output impedance ) because the degree to which it is affected , itself , by these annoying speaker behaviors is reduced along with its output impedance 这个时候如果放大器的阻尼因子足够高的话它就可以帮助我们了（换句话说，低输出阻抗） ，因为阻尼因子的量度直接影响到这个问题，放大器的输出阻抗越小，相应的这些恼人的放大器的行为也会减少。
While low voltage and low power is realized when designing the operational amplifier in this text , great efforts have been devoted to increasing the input common mode range and the swing of output signal , and lowing the output resistance at the same time 只是实现低压低功耗而不实现良好的性能显然是错误的。本文在设计实现低压低功耗的运算放大器的同时，也想法提高输入共模范围和输出信号的幅度，同时降低输出阻抗。
Power : put to say to , and the sum settle the power to is just valid index sign that evaluate the to put the function . it points within the scope of certain of the wave lose true , and the make longer a work can biggest power of the output s . enlarger while connecting into the box of the different resistance that exportation power can have different , usually the enlarger can mark clearly its sum to settle the exportation resistance ; for example a sum that set enlarger while loading a resistance to settle the exportation power to the , and load the resistance to may increase the the above . because the power there is method of various marks , some and illegal factory to can have intention to exaggerate the data , purchase or choose the hour to want with physically hear the to take in to distinct , comparison 它是指在一定的谐波失真范围内，功放长期工作所能输出的最大功率。放大器在接入不同阻抗的音箱时的输出功率会有所不同，通常放大器会标明其额定输出阻抗例如一台放大器在负载音箱阻抗为时的额定输出功率为，负载阻抗为时就可能增加到以上。因为功率有多种标法，某些不法厂商会有意夸大数据，购买或选配时要以实际听音加以区别比较。
By the means of theory , simulation and experiment , the second part of this paper is then analyzed which is on the equivalent output resistance and inductance of the selected inverter and the effect to the output voltage ' s amplitude and phase caused by the different values of the inverter ' s component . it is concluded that by selecting certain precision level components , the difference of the output voltage amplitude is much greater than that of the output voltage phase 其次通过理论、仿真和实验分析了本文所采用的电压电流双闭环瞬时控制方式逆变器的等效输出阻抗和两台逆变器器件差异对输出电压的幅值差和相位差的影响，从而得出选用一定精度的器件，两台逆变器输出电压的幅值差比相位差大得多的结论。
