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我是按图手工焊电路 电路可以正常运行放大10倍 但是将信号发生器放出输入段 再将示波器测输入端发现与信号源设定电压相比 测得电压明显减小
说明你这个电路的输入阻抗小了, 好好研究一下阻抗问题吧.
但是题目要求输入阻抗50欧
