Ok, I understand my mistakes... Thanks very much for helping, I will learn more about the software as well as analog electronics in general before posting more questions (actually that is why I am using ngspice :) )
Cheers, Fabien. 2010/3/31 John Doty <[email protected]>: > > On Mar 30, 2010, at 5:39 PM, lementec fabien wrote: > >> Hi, >> >> I am a very beginner using the geda toolchain, >> please excuse if those are obvious errors. >> >> I am trying to use the 40106 hex inverter without >> success in a project. > > OK, let's see: > > 1. That's a slotted symbol, intended for printed circuit layout, not > simulation. You cannot use slotting in a schematic that will be used to make > a SPICE netlist. > > 2. There's no SPICE model specified in the symbol. Generally for simulation > of complex parts you must get the model from the manufacturer. But I doubt > you'll be able to find a 40106 SPICE model, as SPICE is primarily an analog > simulator, but the 40106 is a digital part. > >> >> You can find another project using the same component, >> that has the same error, at: >> wget http://www.bobdbob.com/~protius/quantel/headlogic.sch > > So many errors in that file. Missing values, unspecified refdeses, open > circuits due to misplaced ground symbols, ... > >> >> I include the error outputs: >> >> tex...@debian:~/repo/engineering_book/electronics/geda/spice/us.0$ >> gnetlist -g spice -o main.{net,sch} >> Command line passed = gnetlist -g spice -o main.net main.sch >> Loading schematic >> [/home/texane/repo/engineering_book/electronics/geda/spice/us.0/main.sch] >> Invalid wanted_pin passed to get-nets [unknown] >> Invalid wanted_pin passed to get-nets [unknown] > > Usually this means that there's a duplicate refdes/pinseq pair. Since every > slot has the same pinseq on its pins, that'll happen if you attempt to use > slotting. > >> ... // repeated multiple times >> >> with the drc2 backend: >> tex...@debian:~/repo/engineering_book/electronics/geda/spice/us.0$ >> more main.net >> Checking non-numbered parts... >> >> Checking duplicated references... >> >> Checking nets with only one connection... >> ERROR: Net 'VSS' is connected to only one pin: U1:7 . >> ERROR: Net 'VDD' is connected to only one pin: U1:14 . > > You have no power source. > >> >> Checking pins without the 'pintype' attribute... >> >> Checking type of pins connected to a net... >> ERROR: Pin(s) with pintype 'output': U1:12 >> are connected by net 'unnamed_net6' >> to pin(s) with pintype 'power': V1:1 >> ERROR: Pin(s) with pintype 'output': U1:8 U1:10 >> are connected by net 'n1' >> to pin(s) with pintype 'output': U1:8 U1:10 >> ERROR: Pin(s) with pintype 'output': U1:4 U1:6 >> are connected by net 'unnamed_net2' >> to pin(s) with pintype 'output': U1:4 U1:6 > > The model of the world drc2 implements is that you nothing but a single > flavor of CMOS logic on a printed circuit board. For semi-analog circuits to > be modeled by SPICE, it's not very useful. > >> >> Checking unconnected pins... >> >> Checking slots... >> >> Checking duplicated slots... >> >> Checking unused slots... >> >> No warnings found. >> Found 5 errors. >> >> >> Thanks for helping, > > I suggest reading the tutorial at: > > http://www.brorson.com/gEDA/SPICE/intro.html > > Understand that a schematic suitable for simulation is a different beast from > a schematic suitable for printed circuit layout. gschem works well for > either, but the approach you need to take is different in the two cases. > > John Doty Noqsi Aerospace, Ltd. > http://www.noqsi.com/ > [email protected] > > > > > _______________________________________________ > geda-user mailing list > [email protected] > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user > -- Madam, what good is a baby? -- Michael Faraday, when asked by Queen Victoria what the electrical devices in his lab were good for _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
