# Operational Amplifier - Virtual ground

In the question above I was asked to solve the general shape of Vout, and the exact values in t=0.5ms,1ms.

My question is - can I approximate a constant virtual ground in the negative input of the opamp?

From the one hand, it's an ideal opamp with negative feedback But from the other hand, there's finite supply voltages, so it's not that simple to use the infinite gain argument (the relation Vout=A(V+ - V-) is no longer valid outside the linear regime of the opamp)

*Except the finite supply voltages, the opamp is ideal