频分复用有源滤波电路的EWB仿真设计

EWB simulation design of active filter circuit with frequency division multiplex

通过对高、低通二阶有源滤波电路的频率特性分析,得出滤波电路的参数设计方法,并采用EWB仿真软件在计算机上进行了仿真设计,该电路用于两路频分复用线路中,可以根据需要方便划分传输信号的频段。笔者计算分析与计算机仿真研究都说明在电路中合理选择相关元件参数情况下,可以使电路的高、低通输出特性均理想,并具有相同的截止频率。该项研究为两路频分复用电路的滤波电路参数设计提供了理论与实验的依据。

Analyses the frequency propexty of high pass and low pass second-order active filter circuit, proposes the parameter design method of filter circuit ,and makes simulation design on the computer with EWB simulation software.The circuit conveniently divides the frequency section of transmission signal according to the need in two path frequency division multiplex circuit. According to the author抯 analysis and the results of computer simulation, properly choosing circuit parameters is helpful for getting the ideal properties either for high pass or low pass filter circuit and having the same cut-off frequency. The research also offers good academic and practical reference to the design of filter circuit parameters in two path frequency division multiplex circuit.