深度负反馈估算中的“虚短虚断”与“假短真断”

“Virtual Short and Virtual Open”Versus“False Short and True Open”in Estimation of Deep Negative Feedback

针对深度负反馈教学中对"虚短虚断"存在的一些误区和争议进行了讨论,阐明了"虚短虚断"的正确含义。提出通过"假短真断"的方法对深度负反馈放大电路进行简化分析,体现了抓主要矛盾的思想,有助于培养学生的辩证思维。

There are some misunderstandings and controversies in the teaching of deep negative feedback.Discussions of such problems and the true meanings of"virtual short and virtual open"are given.A"false short and true open"method is also proposed for simplified analysis of amplifiers with deep negative feedback.The proposed method embodies the idea of focusing on the principal contradiction,and it is conductive to cultivate the students’dialectical thinking.