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用示波器测得差分输出为如图下方所示波形，有微小坡度，请问产生的原因是什么？
附所焊电路的电路图，将电路图中的磁珠改为3.3uH电感代替，电感L1、L2改为33uH，电容C11、C14改为1uF。
此电路信号由INP输入，INN直接接地。
亲；电感是啥规格的？
