R B1b2Vid1 Rb Ib1 rbe Vo + – Rc Ib1 RL Ic1 + – Re rbe Ib2 Ic2 Vid2 + – Rb Ib2 Rc Vid + – Vo1 Vo2 Vic Rb Ib1 rbe Vo + – Rc Ib1 RL Ic1 + – Re rbe Ib2 Ic2 Rb Ib2 Rc Vo1 Vo2