叠加定理在求解交流负载线中的应用  

Application of Superposition Theorem in Solving AC Load Line

作　　者：向秀岑[1] 李明辉[1] 

机构地区：[1]江西理工大学应用科学学院,江西赣州341000

出　　处：《现代电子技术》2010年第1期110-112,共3页Modern Electronics Technique

摘　　要：图解法常用于分析波形失真问题和估算最大不失真输出电压,其中交流负载线的求解和作图又是该方法的核心。为此,应用叠加定理对交流负载线方程的求解进行了探讨,证明了直接耦合放大电路的直流负载线和交流负载线相同、阻容耦合放大电路的直流负载线和交流负载线不同;提出了应用解析法计算最大不失真电压幅值、分析波形失真。与目前广泛采用由戴维宁定理求解交流负载线的方法相比,得出了由叠加定理求解交流负载线的三个优点。Graphic method is often used to study the waveform distortion and obtain the largest non - distortion output voltage,the key is to solve and draw the AC load line. Therefore, the solving Of AC load line equation by superposition theorem is discussed. Then it is proved that the equations of direct coupled amplifier circuit are same and those of RC coupled amplifier circuit is not same. Thirdly,the algebra method to calculate the largest non- distortion output and analyze the waveform distortion is proposed. At last,compared with that by Thevenin theorem which is widely used in nowadays, the method to solve the equation of AC load line by superposition theorem has three advantages.

关 键 词：放大电路 图解法 交流负载线 叠加定理 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]