Op maandag 05-11-2007 om 19:48 uur [tijdzone -0500], schreef KURT PETERS: > Richard, > Your problem is a SPICE issue. Simply put, to do a .TF, your source needs > to be DC. > So, this should work (I haven't tried it). .TF, .OP, and .DC are all under > the heading of "type of DC analysis" in my SPICE book. > > * gnetlist -g spice-sdb -o test.net test.sch > .TF V(1) VIN > .AC DEC 100 10.0 100 > .SAVE V(1) > .OPT NOPAGE NOMOD > .WIDTH OUT=133 > ********************************************************* > * Spice file generated by gnetlist * > * spice-sdb version 2.10.2007 by SDB -- * > * provides advanced spice netlisting capability. * > * Documentation at http://www.brorson.com/gEDA/SPICE/ * > ********************************************************* > *============== Begin SPICE netlist of main design ============ > V1 2 0 sin 0 1 10 > VIN 2 0 DC 0.5V > R1 2 1 47k > C2 0 1 100nF > .end > > I hope that helps,
Thank you for your reply, but alas, this didn't work (dozens of error messages); however, someone else mailed me that I needed to assign both a DC and an AC value to V1, so that the total simulation list looks like this: * gnetlist -g spice-sdb -o test.net test.sch .TF V(1) V1 .AC DEC 100 10.0 100 .SAVE V(1) .OPT NOPAGE NOMOD .WIDTH OUT=133 ********************************************************* * Spice file generated by gnetlist * * spice-sdb version 2.10.2007 by SDB -- * * provides advanced spice netlisting capability. * * Documentation at http://www.brorson.com/gEDA/SPICE/ * ********************************************************* *============== Begin SPICE netlist of main design ============ V1 2 0 sin 0 1 10 ac 1 dc 1 R1 2 1 47k C2 0 1 100nF .end So at least I have something that works, and that is a great help already. And as soon as I have a few days to spare, I'll dive into SPICE more in-depth. Once again my apologies (to the makers of all this software, and also to the rest of the group) if my first message sounded "whiny", but I hadn't expected at all that a GUI simulation tool required a fair amount of knowledge of the underlying engine, file formats and manual editing. To me, it's like firing up a word processor and being required to know about file headers, formatting codes and file storage formats. Then again, a slightly misaligned paragraph isn't as detrimental to the end result as a small error in an input or output definition ;-) And oh, one more (probably stupid) question: does KJWaves offer a Monte Carlo analysis? Or is this too a matter of learning how to use SPICE? Anyway, thanks again for your help and patience, Best regards, Richard Rasker _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
