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用的OPA211AID这个运放的片子,原理图如下,我们在Tian-ti软件仿真的放大倍数为五倍,实际焊接后,放大倍数为4倍,不知道问题出在哪里,输入的为1kHZ的1V的正弦波,出来的也是正弦波,就是放大倍数不对,请解答谢谢