On Aug 14, 2007, at 1:28 PM, al davis wrote: > On Tuesday 14 August 2007, John Doty wrote: >> If you're not adjusting transistor parameters much you could >> make three terminal .SUBCKT models, each containing a >> single transistor, with the substrate connected to a global >> node. Use model-name= (and maybe file=, depending on how you >> organize things) to associate the symbol with the subcircuit. >> The problem here for me would be that I do mixed signal VLSI >> and I'm often tweaking individual transistor parameters (L, >> W, M). In the subcircuit approach, you need a different >> subcircuit for every geometry. > > If you are adjusting transistor parameters, you can use gnucap. > You can change them any time with a ".param" statement, and > pass arguments to a .subckt.
Yeah, but the layout contractor wants Spice netlists as input to their software: it doesn't have this feature. Since I prefer to simulate what I submit (to avoid possible errors in translation), I'll stick with four terminal transistors. 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
