应用新方法探索建立放大器的频响特性图  

Probe into Establishing the Chart of Frequency Characteristic Response of Amplifier by Using the New Method

作　　者：李育德[1] 

机构地区：[1]太原理工大学材料科学与工程学院实验中心,山西太原030024

出　　处：《科技情报开发与经济》2008年第34期85-87,共3页Sci-Tech Information Development & Economy

摘　　要：在模拟电路中放大器电路部分通常有两个耦合电容影响信号频率,而容抗又是频率的函数,这对于分析频率与电容之间相互影响的关系时显得较为麻烦。通过对共射极放大电路的剖析发现,可将本级的RS看成是前级放大器的内阻,而将本级的RL看成是后级放大器的输入阻抗。经过这样处理,该级放大电路中影响频率的因素便只剩1个,并归于输入回路来讨论频率和容抗之间相互影响性问题就显得简单化了。因而提出用归纳法来分析放大器的频率特性。该方法是建立放大器频响特性图的新途径,此种方法称为"归入法"。In the analogous circuit, there are two coupling capacitors influencing the frequency of the signal, and capacitive reactance is the function of frequency, so it is troublesome to analyze the relation between the frequency and the capacitor. Through analyzing the common emitter amplifier, we found that the Rs is Considered to be the internal resistance of the backing circuit and R1 is considered to be the input impedance of the successive circuit, in this situation there is only one factor influencing the frequency of the amplification circuit. It is a very convenient way to study this factor in the input circuit. So inductive method is present and it is a new method for studying the chart of the frequency response of the common emitter amplifier. The new method is called ＂classification＂.

关 键 词：放大器 频响特性 频率特性 

分 类 号：TN722.1[电子电信—电路与系统]