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INA333 放大倍数问题

Other Parts Discussed in Thread: INA333

 这是电路图3V我是采用电池供电,输入信号由函数发生器产生,

 这个是输入(黄)和输出(蓝)波形图,输入就是输入端的波形,输出是Vout对地的波形;两者的地没有共一起;

我rg取得是20K,按理应该放大6倍啊可是没有,接了负载就更小了;麻烦各位朋友帮帮忙,小弟在此谢过了!