基于基尔霍夫定律的正负反馈判别方法

摘要

Distinguishing positive and negative feedback is dififcult in teaching analog electronic technology. In this paper, according to the deifnition of the feedback, using Kirchhoff’s Law to determine the circuit of the input signal, the net input signal and the feedback signal, is conducive to the discrimination of positive and negative feedback. It expounds how to understand the net input signal of ampliifer circuits.%正负反馈的判别是模拟电子技术基础教学中的难点。根据反馈的定义，采用基尔霍夫定律确定输入信号、净输入信号和反馈信号构成的电路，从而判别正、负反馈，阐明如何理解放大电路的净输入信号。