On Fri, Apr 08, 2005 at 05:34:14PM -0600, David Logan wrote: > What would be the best way to do transient analysis using geda? I have > pspice instructions, which are easy enough. I just define a circuit like: > > gnd -> IDC -> t_Close (t=0) -> R -> L -> gnd. Then I go into "Transient > analysis" setup, set "Print Step" and "Final Time", and I get a graph of > my capcitor voltage or inductor current.
I'm not sure I understand what your circuit is supposed to do, are you sending a DC current through an inductor ? That should not produce anyting interesting in simulation at all... In ngspice you should be able to do something like this to simulate an inductor in transient analysis: *Simulation for inductor circuit I1 0 source pwl (0 0 10n 0 12n 1) R1 source 1 10 L1 1 0 10nH .tran 100ps 50ns .end Save that to a file filename.sp, run: ngspice -b filename.sp -r filename.raw -o filename.out Then load filename.raw into gwave. -- Daniel Nilsson
