摘要
滤波器用于对信号的频率具有选择性的电路,它的功能是使特定频率范围内的信号通过,有源滤波器被广泛用于信息处理、数据传送等电路中。在对二阶有源低通滤波器的原理进行分析的基础上,采用2个2阶低通滤波电路级联的方案,用查表法设计了基于巴特沃思逼近的4阶有源低通滤波器。在Multisim软件中使用虚拟示波器、波特图示仪等设备,对设计的滤波器的交流特性进行仿真,并对仿真结果进行了分析,其交流特性符合理论设计,具有一定的参考价值。
Filter is the circuit which has a selective for the frequency of signals,its function is to make a specific range of frequency through.Source filter is widely used for information processing and data transmission circuit.Based on the analysis of principle of 2nd Source low-passed filter,by using the Scheme of cascading two 2nd source low-passed filter and the method of examining the table,the 4nd source low-passed filter based on Butterworth is designed.By using the oscilloscope and Bode plotter in Multisim,the AC Features of this Filter was Simulated,and the simulation results were analyzed,it＇s AC features met with theory design and has certain reference value.
出处
《新技术新工艺》
2011年第6期34-36,共3页
New Technology & New Process
基金
宝鸡文理学院重点资助项目(ZK09134)
