基于反馈放大器的微分积分电路设计研究仿真

摘要

利用放大器优化设计微分积分电路是为了将反馈信号放大,并提高稳定性.由于存在零漂和微分泄漏引起放大信号不稳定,误差大.所以提出了一种反馈放大器的微积分电路设计方法,利用电压反馈放大器(VFA)和电流反馈放大器(CFA),分别构建了积分电路和微分电路,并对电路进行分析,计算输入信号的理论频率范围.然后利用Muhisim仿真工具搭建电路,在不同输入信号频率下进行实验.仿真结果表明,相比于传统的微积分电路,利用反馈放大器构建的微积分电路输入信号频率范围得到明显提高,仿真结果与理论计算结果相似,证明了仿真电路的正确性.%This research focuses on method for design of differential and integral circuit based on feedback amplifier.The research used voltage feedback amplifier (VFA) and current feedback amplifier (CFA) to build integral circuit and differential circuit respectively and analyzed the circuit,then calculated theoretic frequency range of input signal.The research used Multisim simulation tool to set up circuit and carried out experiment under different input signal frequency.Simulation results show that the differential and integral circuit built by feedback amplifier can improve frequency range of input signal apparently.The simulation results and theoretical calculation results are similar.It proves the validity of simulation circuit.