差动运放电路仿真分析与最优模型探究  

Simulation Analysis of Differential Operational Amplifier Circuit And Optimal Model

作　　者：蒋金[1] 陈长兴[1] 

机构地区：[1]空军工程大学理学院,陕西西安710051

出　　处：《海南大学学报（自然科学版）》2013年第3期240-244,共5页Natural Science Journal of Hainan University

基　　金：陕西省电子信息系统综合集成重点实验室基金资助项目(201107Y16)

摘　　要：考虑到差动运放电路性能的多样性,在分析中应与实际电路相结合.若外部电阻、输入阻抗R i相同,改变增益条件和电路的共模抑制比K CMR等因素对电路进行了仿真分析.当输入相同信号时,用multisim软件仿真各种电路和对相同信号输入时的抑制能力,并用傅里叶分析(Fourier Analysis)对输出信号分析,探究较理想和合适的差动运放电路.通过比对各类型差动电路,分析得出该类电路中仪用放大器应用的各种优点.文中对差动运放电路的仿真分析与最优模型的探究,可供分析类似电路参考.Because of its diversity,the analysis of differential operational amplify circuit should be together with practical circuits.If the non-essential resistance and input impedance is equal,the analysis of simulation of circuit is performed by changing gain condition and common-mode rejection ratio and other factors.When the same signal is input,multisim software is used to simulate inhibiting ability of various kinds of circuit to the same input signal.In order to explore an ideal and appropriate differential operational amplifier circuit,Fourier Analysis is used to analyze the output signal.Based on the comparing among various kinds of differential op-amp circuit,the advantages of instrument amplifier which is applied in this kind of circuit are obtained.The simulated analysis and optimal model of differential op-amp circuit can be used for reference in the similar circuit analysis.

关 键 词：差动运放电路 仿真分析 共模抑制比KCMR 差模增益Ad 输入阻抗Ri 傅里叶分析 

分 类 号：TM133[电气工程—电工理论与新技术]