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在看电流反馈运放THS3201时,看到SR随输出电压有两条曲线,分别是SR+与SR-,这是怎么回事?求教!

问题:

1.SR怎么有两个数值,你看,在图中有两条线,一正一负,这表示的是什么?之前一直以为SR压摆率只有一个值呀

2.我标记出来的Vstep,这代表着什么?在看电流反馈运放的时候,看到“step size”,这跟Vstep有关系吗?