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单电源供电RAIL TO RAIL运放如何进行手动调零



请问各位大牛 我想做一个单电源供电的反向比例运算放大器 放大十倍 输入信号几百毫伏的级别  现在有了初步的电路图 但是不知道如何调节电路零飘 想尽量提高精度 请问各位大牛如何设计  手动调零最好 谢谢了