which is faster？about amplier.

Vref不接地的话，不公平
接地的话，而且运放是V+ - V-供电，offset=0...我猜1，2的输出拉电流被反馈网络抢了一部分。

如果运放一样，反馈系数=1的单元带宽最宽，同时输出摆幅最小

non-inverting configuration faster (output1):
1. small signal wise, higher bandwidth
2. large signal: normally there are back-back input diodes at the inputs of opamp, which dramatically improves slewing at output (if slew is dominated by load cap); no resistive load;

okay，兄弟们都说大信号小信号都是1占优势，
那么结论：无论输入ΔV多大，都是1更快。