I am testing QSpice and I get a timestep too small error when trying to simulate. I have replicated the whole circuit in LTSpice and I do not get an error in LTSpice. What is going wrong?
Here is a Google drive link to both simulations since I cannot post them here:
QSpice can simulate the netlist of LTSpice, so I tried it. QSpice simulated your “BipolarHB.net” without the “time step too small” error, but the results were different from those of LTSpice.
The option setting, e.g., “.option reltol=1e-4 abstol=0.1p chgtol=1f vntol=0.1u gmin=0.1p,” made the results a bit more similar, but not enough.
I wonder if we need any additional option settings or netlist corrections for QSpice.