二阶有源带通滤波器设计.docx

摘 要在学习《模拟电子技术基础》的基础上，针对课程设计要求，设计一个通带为0.833KHz、中心频率为5KHz、品质因素为6、最大增益为2的带通滤波器，选择有源滤波器的快速设计法为设计方案，计算出该方案需要的电阻、电容、运算放大器参数，通过Multisim软件仿真和电路板的制作，对所选的方案进行调试，验证方案的正确性，并将实际设计的滤波器与仿真得到的滤波器进行比较，分析误差产生的原因。关键字：带通；滤波器；快速设计法；Multisim仿真；调试；分析误差目 录引言······························································31.设计任务及要求··············································32.方案选择·····················································33. 二阶有源带通滤波器理论设计································43.1 简介····························································43.2 工作原理························································43.3传递函数及性能参数··············································53.4 器件参数的选取··················································63.5 Multisim仿真及仿真数据处理·····································64. 电路板的制作·················································84.1 原理图和PCB图的绘制············································84.2 电路板制作过程··················································95. 电路板的调试 ···············································105.1 调试的仪器·····················································105.2 调试过程及结果················································105.3 调试所遇到的问题···············································135.4 调试误差分析···················································136. 结论·························································13谢辞······························································15参考文献·························································16附录······················································17引言本论文主要讨论信号的处理电路，其中一种电路称为模拟滤波器，模拟滤波器的主要功能是传送输入信号中有用的频率成分，衰减或抑制无用的频率成分，本文主要研究由电阻、电容和运算放大器组成的有源带通滤波电路，其原理是通过对电容、电阻参数的配置，使得模拟滤波器对频率在通带内的频率分量呈现很小的阻抗，而对频带外的频率分量呈现很大的阻抗，这样当负载电流信号通过该模拟带通滤波器的时候就可以把通带内的信号提取出来，把通带外的信号去除。本论文介绍了使用查表归一快速设计有源滤波器的方法设计二阶有源带通滤波器的详细步骤，并对设计过程中所要处理的数据及图像进行详细地列举、分析。1.设计任务及要求1）设计一个模拟带通滤波器；2）参数自定；3）调整并记录滤波器的性能参数及幅频特性；2.方案选择滤波器是对输入信号的频率具有选择性的一个二端口网络，它允许某些频率（通常是某个频率范围）的信号通过，而其它频率的信号幅值均要受到衰减或者抑制。这些网络可以由RLC元件或RC元件构成无源滤波器，也可以由RC元件和有源器件（如集成运放）构成有源滤波器。由集成运放、R、C组成的有源滤波有不用电