Thanks for the response! Please see my follow up questions: >Hi Mark,
>On Donnerstag, 15. Mai 2008, Mark Lorenz wrote: >> This is my first attempt at gEDA, so please forgive my ignorance. >> I'm trying to model a Cockroft-Walton voltage multiplier >> (http://en.wikipedia.org/wiki/Cockcroft-Walton_generator) as a simple >> first test circuit. I had no problem using gschem to make the >> circuit schematic, but i run into problems with my ngSpice >> simulation. It tells me: >> >> Error on line 12 : d4 4 higherout unknown >> unable to find definition of model unknown - default assumed >You've not added a diode model. Thus a simple diode model is used. Where can I find some instructions on obtaining and adding new models? >> I get similar error message for all 4 diodes. The simulation results >> are unreasonable, so I don't think the "default" (what ever that my >> be) diode model is what I want. >> >> I have attached my netlist and schematic file. > In the schematic you should replace the buses with nets. >The bus does not connect your diodes as you'd expect (see your netlist). > Additionaly you don't have a net with the netname "0" in the netlist. >spice needs that reference net. You can add that with a GND symbol >(gnd-1.sym). > Regards >Werner
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