| 仪表放大器中电阻变化率与噪声的关系 |
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| 引用本文： | 孙逊,孙麟德. 仪表放大器中电阻变化率与噪声的关系[J]. 数学的实践与认识, 2014, 0(7) |
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| 作者姓名： | 孙逊 孙麟德 |
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| 作者单位： | 上海应用技术学院电气与电子工程学院;上海理工大学上海医疗器械高等专科学校; |
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| 摘 要： | 探讨电阻变化率对由3个运算放大器组成的仪表放大器输出端噪声的影响.把运算放大器噪声模型和电阻噪声模型代入仪表放大器电路,得到输出端噪声与电阻的关系式,通过列表分析,按不同的电阻比筛选出对输出端噪声影响显著的电阻.orCAD软件的仿真结果验证了分析是正确的.
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| 关 键 词： | 仪表放大器 噪声 电阻 运算放大器 |
Relationship of Resistance Changing Rate and Noise in Instrumentation Amplifier |
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| Abstract: | This paper studies the effects of three operational amplifier instrumentation amplifier output noise by resistance change rate.The relationship between resistances and output noise of the instrumentation amplifier are obtained by using operational amplifier noise model and resistor noise model.The key resistances are selected according to the resistance ratio by tabulation method,orCAD simulation results verify the conclusion of this paper. |
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| Keywords: | instrumentation amplifier noise resistance operational amplifier |
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