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.
This paper studies the effects of three operational amplifier instrumentation am- plifier 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.
出处
《数学的实践与认识》
CSCD
北大核心
2014年第7期161-167,共7页
Mathematics in Practice and Theory
关键词
仪表放大器
噪声
电阻
运算放大器
instrumentation amplifier
noise
resistance
operational amplifier
