Given this circuit :
OA3 is not ideal and has a bias current (5μA) and an offset voltage (10mV).The other two are ideal. I have to calculate the maximum deviation voltage on RL (load resistance). . I'm struggling with the understanding of the bias current. Let's consider IB+(OA3), since Vs is zero, and virtual ground concept still holds for 0A1 is it okay to assume there is no current through R8 and as a result V1 is 0V ? I'm not really sure about that. How might the current IB+ behave ? Would it just enter the output terminal of 0A1 or does it have any other path to flow through ?