I built a simple resistive ladder for voltage divider circut with componenets in analogLib. When I tried to simulate this circuit with Ultrasim simulator, the intermediate nodes failed to show the output waveform excepting ground and supply nodes. I added them in the outputs list,tried save all method but none of them worked. It happened with both SPICE and Spetre netlisting formats. I tried this simple circuit when a complex circuit failed to simulate properly. Hence now I find that the resistor is not identified properly in the Ultrasim simulation. Is there any known solution for this probelm??Thanks in advance for your suggestions
What sim mode are you running? Try A or S mode and see if the data is what you expect.
I tried your suggested Analog and Spice options but the problem is same. The CIW with resistor ladder showsError: Trying to plot expression "..../Ultrasim/schematic")>, which does not evaluate to an object that can be plotted like waveform or parametric wave. Please refer to wavescan user guide......I simulated one invertor with transistor models also which runs smoothly without any errors and expected waveforms. I observed problem with only resistor albeit I didnt check other passive componnets. In my bigger complex circuit also though it displays waveforms there is error in resistor simulation with almost zero resistance.
If you open the results browser, can you see the data?
Sorry for the late reply. Now it is working with AnalogLib components. When I connect my own specific process library instances in the chain with three resistors, only one resistor is identified in the results browser and with Infinity in its value. Any suggestions to modify any CDF etc???? The library works well with the Spectre simulator. Resistors are calculated depending on the l and w and subcircuit definiton in the modle library file of spectre.
If the library works well with Spectre, then it's probably not a CDF issue.UltraSim in ADE creates a spectre syntax netlist and uses Spectre CDF.What are rvshort or rcut options set to?Do you see any messages in the ultrasim.out file indicating that "node X not found or was cut"?In the Element Count, do you see all your resistors?