It is not necessary that AMPLIFIERs maintain common-mode rejection for signals beyond the supply voltages: what is required is that they do not self-destruct for momentary overvoltage conditions.

• 而信号远离电源电压后，再维持放大器的共模抑制是不必要的，需要的却是不为瞬间过电压所毁坏的条件。