基于 Multisim 的高频小信号谐振放大器仿真研究

摘要

The traditional teaching of high frequency small signal tuned amplifier is too theoretical and lack of practice, which resulted in the inefficiency in teaching.The introduction of Multisim and the circuit simulation software can realize the circuit structure,parameter setting and simulation,frequency characteristics,load characteristics,the pass band and other performance parameters analysis,which arrives at the conclusion that the high frequency small signal tuned amplifier circuit with the resonant frequency of 6.0 MHz,voltage gain of 25.5 dB decibel can meet the requirements,and the simulation re-sults are consistent with the theoretical analysis.In teaching practice,both the analysis of circuits and the intuitive simula-tion results may help students not only understand the theoretical knowledge further,but also improve the circuit analysis and design ability.%为解决高频小信号谐振放大器传统讲授理论性较强，缺乏直观性，教学效果不理想的问题，采用了引入电路仿真软件 Multisim 进行分析研究的方法。通过对电路结构、参数设置及仿真、频率特性、负载特性和通频带等性能参数进行分析，证明了谐振频率为6.0 MHz、电压增益为25.5 dB 的高频小信号谐振放大器可满足要求，仿真结果与理论分析一致。教学实践中，通过对仿真电路的理论分析和直观地展现仿真结果，不仅使学生加深了对理论知识的理解，还有助于提高学生的电路分析和设计能力。