摘要
以Multisim为平台分析了二阶低通滤波器电路。使用虚拟示波器等虚拟元件,采用交流分析方法和参数扫描分析方法仿真分析了二阶低通滤波器电路的工作特性,及各元件参数对输入输出特性的影响,并演示了Multisim中虚拟仪器及各种分析方法的使用。仿真得到了该电路在低频状态下的通带电压放大倍数AUP=2,电路的截止频率fP=148.495 2 Hz。仿真结果与理论计算相符。
In this paper,second order low -pass filter circuit is analyzed based on Multisim. With virtual instruments including a virtual oscilloscope,the working characteristics of second order low- pass filter circuit and the influences of all instruments on the result of output using AC analysis and parameter scanning analysis are described. Further, the virtual instruments and analysis methods in Multisim are demonstrated. Using simulation analysis, passband voltage magnification of the second order low - pass filter circuit in low frequency range Avp = 2, the cutoff frequency of the circuit fp = 148. 495 2 Hz. The simulation results are in reasonable agreement with theoretical values.
出处
《现代电子技术》
2008年第17期156-158,共3页
Modern Electronics Technique
基金
湖南省教育厅资助项目(07C640)
