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请问加了直流通路后，这个电路的输入阻抗是不是由R1，R2决定呢？小于1k欧？
你好，
输入阻抗应为为R1//R2
那请问提高输入阻抗是不是只能通过提高R1，R2的阻值了呢？直流通路有其它解决办法吗？这里想要尽可能大的输入阻抗
