From: Garst R. R. <ga...@is...> - 2005-05-15 16:43:43
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Did you try w=1000u m=1 In your failed example, you rely on m having a default value of 1. Garst Fam. Kaiser wrote: >Hello everybody, > >I ran into a problem with a power transistor. The simulation results are wrong >when I use w=1000, but they are correct when I use w=10 and m=100. > >Does anybody know why? > >Is it a Spice or BSIM limitation? > > >Netlist with wrong results: > >.control >dc vds 0 6 0.2 vgs 0 5 1.2 >plot -i(vds) >.endc >Vds drain 0 DC 1V >M1 drain gate 0 0 nmos4 l=0.6u w=1000u >Vgs gate 0 DC 5V >.END > > >Netlist with correct results: > >.control >dc vds 0 6 0.2 vgs 0 5 1.2 >plot -i(vds) >.endc >Vds drain 0 DC 1V >M1 drain gate 0 0 nmos4 l=0.6u w=10u m=100 >Vgs gate 0 DC 5V >.END > > > >------------------------------------------------------- >This SF.Net email is sponsored by Oracle Space Sweepstakes >Want to be the first software developer in space? >Enter now for the Oracle Space Sweepstakes! >http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click >_______________________________________________ >Ngspice-users mailing list >Ngs...@li... >https://lists.sourceforge.net/lists/listinfo/ngspice-users > > > |