Discussion on a Circuit Including Ideal Operational Amplifier

I/O characteristic of circuit including ideal operational amplifier is simulated and deduced in this paper from computer simulating and theory analyzing in order to clear further the relevant concept and characteristic of ideal operational amplifier.The results indicate the circuit behaves like a voltage follower within linear input range.The output wave becomes distorted seriously as input signal beyond linear input range.Compared with open loop circuit,the closed loop circuit has larger linear input range and smaller voltage gain,which exactly the characteristic of circuit with negative feedback.So we can not consider simply that feedback between the output and the noninverting input is positive feedback.