大家好,求解一个问题,请知道的朋友指教一下,运算放大器同相输入的输入阻抗高,反相输入的输入阻抗低。我不明白为什么是这样,运算放大器内部的电路似乎应该对称,为什么有同向反向输入电阻不同的说法,还是说这是在某种特定的条件下成立的?
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