假设VIN为正:
(1)通过瞬时极性法分析可知:Q3,Q5的集电极电流增大;而Q4,Q6的集电极电流减小;
(2)也可以容易分析Q5的基极电压是减小的,从而Q10的集电极电流减小,(另:Q6的基极电压减小,Q13的集电极电流增加);
论文上原话是:The decreasing potential at the base of Q5 results in decreasing current in Q10.This reinforces the reduced current in Q4, resulting in lower potential at the base of common emitter output device Q6.