单管放大电路静态工作点仿真分析

针对传统教学模式的弊端以及静态工作点Q对放大电路的重要性,研究了应用电路仿真软件Multisim对Q点的测量方法,包括常规测量法、自带Q点分析功能、测量探针法,并分析了3种方法的优缺点,也仿真验证了偏置电阻R_B对Q点和电路工作状态的影响。仿真结果和理论分析计算结果一致,验证了软件仿真效果理想。教学实践证明,将真实实验教学和仿真实验相结合,可丰富实验教学内容,拓宽实验教学空间,激发学生的学习积极性。

Simulation Analysis on Quiescent Point of Single-Tube Amplification Circuit

Focusing on deficiencies of traditional teaching mode and the importance of quiescent point Q to amplification circuit,supporting measuring methods for Q with Multisim circuit simulation software is developed.Advantages and disadvantages of measuring Q with ordinary measuring method,Multisim function and measurement probe method are discussed.In addition,the affects of bias resistor R_B to Q and circuit operation state are proved.The simulation results are consistent with theoretical analysis,which verifies the effectiveness of software simulation.Applications show that combining the Multisim simulation experiments with traditional experiments can enrich training content,broaden the experimental teaching space,and stimulate students' enthusiasm for study.