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INA118如何稳定输出

Other Parts Discussed in Thread: INA118

help help help

1、我用INA118做前置放大

2、输入信号是几十毫伏的动态信号

3、要放大到3.3伏内

4、有1v左右的抬升

5、单电源供电

示波器显示如图,

电路是这样子的

但是这个电路仿真结果是直线

 

还有一个电路仿真出来是我想要的可是搭实际电路时结果不对,输出是直线

仿真结果是

 

 

请大神们指教啊,请告诉我为什么会是这样的,能告诉我该怎么搭电路吗?

谢谢 谢谢 谢谢 谢谢 谢谢 谢谢 谢谢 谢谢!