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我用TI网站下载的LMP7721参考仿真模型，把电流源修改为1n,原来30n
仿真结果如下图。
为什么在电流输入小于500pA，输出电压是60mv左右？？
我想用LMP7721实现光电二极管的I/V转换，光电二极管最低电流3PA，现在仿真时输入小于500PA就不对了，请高手解答，谢谢！
可以用双电源供电。
