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在下面这个电路图中，为什么OP27的同相输入端（3管脚）要输入电源电压的分压？在电路设计中如何确定R6和R7的值？
Hi,
帮你用Tina仿真了一下：
从仿真结果来看，改变同相输入端分压电阻阻值可以调整输出波形中的直流分量。R6和R7的值决定了输出波形中的直流分量。
