单就这部分电路来说,当通过R7电流为0时,放大器输出应为0,但是实际上此时有40mv左右的输出。
经测量放大器两个输入端有1mv的压差,很明显是失调电压经放大后输出。
但是参考手册上给出的数据失调电压仅为100uV,请问为什么会出现这么大的偏差,还是我的电路原理有问题?
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