Hi all: Please look at the OPA in the attachment, after I perform the TRAN analysis, I find the result is so strange!
From the AC analysis, the PHASE MARGIN is 60, and the BANDWIDTH is 40MHz, but from the TRAN analysis, I think this OPA is not stabilization! I do not know why???
Did you run open loop or close loop? Notice that
OPA has high open loop gain, so even if you apply
very small input, the output will swing rail-rail,
looks like oscillation.