在判断反馈电路的反馈类型方面,用框图判断直观易懂,但较复杂;实际判断时多用一种简单的经验判断方法.从基本的电路出发,通过电路的适当变形来证明这两种方法的等效性,从而也说明了经验的判断方法是正确的. In judging the type of feedback feedback circuit, the block diagram to determine the intuitive and easy to understand, but the actual judge more than a simple method of experience to judge from the basic circuit, the circuit through the appropriate deformation to prove that the two methods Equivalence, which also shows that the method of judging the experience is correct.