摘要
目前 ,方框图法是被广泛使用的分析负反馈放大电路的方法。但用其求电路的增益时 ,不同的组态要用不同的方法 ,因而比较复杂繁琐。本文介绍另外一种求增益的方法 ;首先直接由负反馈放大电路求出回路增益 ,再利用反馈系数得到负反馈放大电路的增益 ,最后计算输入电阻、输出电阻。它的优点是负反馈放大电路的增益简单易求。
The block diagram method is widely used to analyze the negative feedback amplifier at present. But because different configurations need to use different treatments, it is difficult to calculate the gain of a negative feedback amplifier. A new method to calculate the gain of a negative feedback amplifier is introduced in this paper. First, calculate the loop gain directly from the circuit. Second, obtain the gain of amplifier utilizing feedback coefficient. Last, calculate the input and output resistance. The advantage of this method is simpler for calculating the gain of a negative feedback amplifier.
出处
《电气电子教学学报》
2003年第3期33-36,共4页
Journal of Electrical and Electronic Education
