| 运放电压衰减器阶跃响应分析与改进 |
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| 引用本文： | 张丽敏, 陈孝桢, 陈娟, 陈毅煌.运放电压衰减器阶跃响应分析与改进[J].电子器件,2009,32(2). |
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| 作者姓名： | 张丽敏 陈孝桢 陈娟 陈毅煌 |
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| 作者单位： | 南京大学电子科学与工程系,南京,210093 |
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| 摘 要： | 普通运放电压衰减器输出容易产生超调或振荡现象,基于运放二阶模型论述了该电压衰减器阶跃响应产生超调的原因,并通过对电压衰减器取不同衰减阻值,分析输出波形的不同,得出负载过重是该电路输出产生振荡的重要原因.最后从电路负载角度给出了用电压跟随器实现衰减器的改进设计方案,该设计经实验证明可很好地抑制输出振荡现象.
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| 关 键 词： | 衰减器 运放 阶跃响应 跟随器 |
Analysis and Improvement of OP Amp Voltage Attenuator s Step Response |
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| ZHANG Li-min,CHEN Xiao-zhen,CHEN Juan,CHEN Yi-huang.Analysis and Improvement of OP Amp Voltage Attenuator s Step Response[J].Journal of Electron Devices,2009,32(2). |
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| Authors: | ZHANG Li-min CHEN Xiao-zhen CHEN Juan CHEN Yi-huang |
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| Affiliation: | Nanjing University;Department of Electronic Science and Engineering;Nanjing 210093;China |
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| Abstract: | The ordinary voltage attenuator with operational amplifier is prone to generate overshoot or oscillation.Based on a second-order model of the operational amplifier,the paper elaborates the reason for the step response overshoot of the voltage attenuator,and concludes that overloading is the important cause of the circuit outputting oscillation by analyzing the difference of the voltage attenuator's output waveform in different attenuation resistances.Finally,the paper gives an improvement design with the vo... |
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| Keywords: | attenuator the operational amplifier step response follower |
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