I’m trying to get a simple transient step response simulation using delta generation sources. I place several delta generation sources in the pn junction diode, configure a transient simulation, and apply a global shutter to create a current step input. I set voltage tables on the p-type contact to define the bias voltage and the simulation time duration. I set the minimum time step to 0.1 fs and the maximum time step to 100 fs (should be overkill). I define the step input to start at 5 ps with a 1 ps slew, and the simulation runs for 20 ps.
The simulation successfully runs, but the transient current through the p-type contact follows the input current source seemingly exactly – i.e. it is indistinguishable from the slew of the step input and increases to its maximum current value in 1 ps. This is extremely unlikely to be accurate.
I have attached the script that creates and runs the simulation. Any ideas as to what I’m doing incorrectly?
transient_diode_step_response.lsf (4.4 KB)