dra66ard
Newbie level 5
Hi, I am currently design an rail-to-rail op amp and i found a circuit for the input stage with rail-to-rail input using complementary differential amplifier but unfortunately there are additional transistor in the circuit (those transistors that i circle in red). I know the additional transistors are for maintaining the gm in the circuit but i do not know how is the circuit works after the differential amplifier. Can anyone please help to explain to me ? Your kindness is highly appreciated and thank you in advance =)