本文对运算放大器在差动输入状态下的输入阻抗问题做了全面的分析。
A full-scale analysis of input impedance of the operational amplifier under the state of differential input is given here.
运算放大器扩展功能，在电子电路设计中其数学模型为放大电路，含移相电容、反馈电阻及输入阻抗。
In circuit design, the mathematical model of operational amplifier expanded function is expanded circuit. The circuit includes phase electric capacity, the feedback resistance and the input impedance.
通过讨论输入失调电流对集成运算放大器输出的影响，推导出集成运算放大器外围阻抗的最佳取值关系。
After discussing how the input offset current influences the output of operational amplifier, the optimal relationship between peripheral impedance is obtained.
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