Ken,
thank you so much for your reply.
Let me explain you what I am doing. I am simulating analog front end (transistor level) which excites the external transducer (verilogA model with channel delay) and receives the input signal.
I am interested in the drift of the input signal over temperature with respect to time, i.e. run two simulations (at room and high temp) and compare the received signal, how much the received signals shift in time (done in matlab).
Signal shift in time needs to be resolved down to ps resolution. I have tried different tolerance settings, and reltol=1e-5 (or smaller) gives the same result.
Circuit is designed in very low leakage process, so I generally use gmin=1e-15.
By the way, I have also asked Cadence guys, but still waiting for the reply
Your reply is faster
Thanks once again,
A.