直接耦合多级放大电路的虚拟测试分析与研究  

Analysis and research on virtual testing of direct coupled multistage amplification circuit

作　　者：蒋俊华[1] 侯卫周[1] 

机构地区：[1]河南大学物理与电子学院,河南开封475003

出　　处：《实验技术与管理》2017年第3期115-119,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目(21173068);2015年河南省"电子信息科学与技术"教学团队资助

摘　　要：利用NI Multisim 12.0仿真软件对直接耦合多级放大电路的静态值、差模电压放大倍数和共模抑制比等参数进行了虚拟测试分析。通过调整晶体管集电极电阻测试静态电压值,满足了分析放大电路的先静态、后动态原则。观察共模放大和差模放大时各级输出电压的不失真波形,计算了电压放大倍数,其结果与理论计算相吻合。进一步利用仿真软件中的温度扫描分析功能验证了温度对晶体管静态工作点的影响。The virtual test analysis of quiescent values, differential mode voltage amplification and common mode rejection ratio parameters was carried out for direct coupled multistage amplification circuit via NI Multisim 12.0 software; by adjusting collector resistance, the quiescent voltage values were tested, which can meet the ＂static and dynamic＂ principle. At the same time, the voltage amplification of differential mode and common mode was calculated by observing the non distorted output voltage waveform, it is found that the amplification is in agreement with the theoretical calculation. It is further verified that temperature affects quiescent operation point of the transistor.

关 键 词：直接耦合 多级放大电路 虚拟测试 差分放大 

分 类 号：TN710.9[电子电信—电路与系统] TN721