【摘要】 本文应用叠加原理分析运算放大器的开环输入电阻对反相比例放大运算精度的影响.证明当运算放大器的开环增益足够高时,在适当地选取比例运算放大器的输入端电阻和反馈电阻的条件下,运算放大器开环输入电阻对闭环反相比例放大运算精度的影响是可以忽略的.该分析方法和结果也适用于其它一些运算放大器构成的运算过程.更多还原

【Abstract】 <Abstrcat> This paper analyses operation accuracy that is influenced by the open input resistance of operation amplifier by means of superposition theorem. The error of close loop gain of inverse proportion amplifier, which is caused by the influence of open loop input resistance of operation amplifier can be negligible when the open loop is by the gain of the operation amplifier. The analysis method can be applied to other amplifiers that are composed of operation amplifier.更多还原