After discussing how the input offset current influences the output of operational amplifier, the optimal relationship between peripheral impedance is obtained.

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。

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The principle of transforming current to voltage is analyzed, and it is pointed out that the error factors mainly consist in the bias current and offset voltage of the operational amplifier.

分析了电流—电压转换原理，指出转换误差主要来源于偏置电流及失调电压。

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