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电路图的话就是最基本的电路图。正相输入端输入的是1kHz的20mV正弦（信号发生器后接电阻分压网络得到的）Rg=500欧姆，负向输入端是接地的。结果输出是100mV的正弦。Ref接地。供电电压正负5V
如果电路连接正常，请检查下电阻阻值是不是搞错了？
我用TINA仿真了下没问题，实际放大倍数即为1+（50K/RG).可以把你的电路发上来看下。
