Discussion on Teaching Analysis of Multistage Amplifying Circuit

In the course of Analog Electronic Circuit, most textbooks usually directly use the small-signal analysis method (SSAM) to analyze the multi-stage amplification (MSA) circuits without considering the relationship between single-stage and multi-stage. It’s difficult for students to analyze the performance of MSA circuits due to the complexity of MSA circuit and its equivalent circuit and the low efficiency of analysis and solution. Based on the teaching idea of "building blocks"，this paper puts forward an effective MSA circuits analysis method based on "relationship of single-stage and multi-stage" and gives the performance index of MSA circuit directly through the relationship between SSA and MSA and the indicators of each basic SSA circuit such as CE, CC and CB. The teaching practice shows that this method can effectively promote the students' understanding of MSA circuits, simplify the analysis process of MSA circuits, and make much sense in teaching.