基于Multisim的模拟电路仿真与实现毕业论文.docVIP

目 录 1 绪论 5 1．1选题意义 5 1．2研究现状 5 1．3 Multisim发展简介 6 1．4 EDA在发达国家的应用状况 7 1．5 软件简介 7 1．6论文主要工作 8 2 基本放大电路仿真处理单元 9 2．1本章引言 9 2.2二极管放大电路研究 9 2.2.1二极管理论分析 10 2.2.2 二极管特性电路软件仿真 12 2.2.3本节总结 13 2.3三极管放大电路研究 14 2.4基本放大电路的频率响应 28 2.5本章小结 34 3 两种常见的放大电路仿真处理单元 35 3．1本章引言 35 3.2集成运算放大电路研究 35 3.3反馈放大电路研究 44 3.4本章小结 53 结论 54 参考文献 55 致谢 56 摘 要 Multisim是一种功能比较强大的电子电路仿真软件，利用Multisim软件可以使设计与仿真同步，一边设计一边实践，修改调试也比较方便；仿真实验中又不消耗实际的元器件和损伤测试仪器，试验成本极低，试验速度极快；仿真试验成功的电路可以直接在产品中使用。 首先利用该软件验证了几个典型的单元电路，包括基本放大电路、基本放大电路的频率响应、集成运算放大电路、反馈放大电路；其中重点研究了基本放大电路：先进行理论推导，再测试出其通频带，用软件画出其幅频特性曲线，再给出原理电路图，然后制作出实际电路板，进行实际测量。得出的结论与仿真结果基本一致，仅存在很小的误差，最后就实际与仿真的微小误差给出简单的解释。 总结了Multisim软件值得在电路研究、设计中推广。 关键词： Multisim；仿真实验；电路设计：电路分析 ABSTRACT This paper mainly validates the powerful function of Multisim software．Multisim is a multifunctional electronic simulated circuit softwarewhich can design and simulate at the same time．The modification of the circuits is very convenient．By Multisim simulation，cost of experiments can be reduced since no real devices are wasted during the test．Moreover，SO the rate of experiments is very fast．The Success of circuit simulation Can be directly used in the product． We firstly test several typical cell circuits by using Multisim，including basic amplifier circuit，the frequency response of basic amplifier circuit，Integrated Operational Amplifier circuit，in which basic amplifier circuit is the main point．Based on theoretical calculation，the typical Multi-channel negative feedback two step low pass filter segment is simulated．Then we test the passband and draw the amplitude response using the software．Furthermore，schemat is drew，and according to the PCB we designed and test the performance of the board．The conclusion of the real experiment is mostly consistent with the simulation and there is only tiny difference between them．The simple explanation of the difference is also referred in this paper．Finally，we make some simulation on several simple circuits commonly used in daily life．And an actu