Thank you! 2008/5/17 Dan McMahill <[EMAIL PROTECTED]>:
> Yang Hawk wrote: > > have a question about why my current flow is negative: > > my circuit net list here: > > diode > > vs 1 0 dc 1v > > d1 1 0 dnorm > > .dc vs -0.8v 0.7v 0.004v > > .model dnorm d(is=1e-14) > > .probe > > .end > > > > and in ngspice, I execute, > > plot i(vs) > > > > the plot graph is shown that the current is negative > > > > I find the answer from ngspice/spice3f5 user's manual: > > I(VXXXXXXX) > > > > specifies the current flowing in the independent voltage source named > > VXXXXXXX. Positive current flows from the positive node, through the > > source, to the negative node. For the ac analysis, the corresponding > > replacements for the letter I may be made in the same way as described > > for voltage outputs. > > > > > > so, no doubt, the current is negative. But why the spice is so designed? > > > > why not? > > > and How could I check current between any two nodes? > > I'm assuming you mean "how could I check current in any branch". You > can insert a zero volt DC voltage source in any branch and monitor the > current through it. > > > _______________________________________________ > geda-user mailing list > geda-user@moria.seul.org > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user > -- SparrowHawk http://sprhawk.spaces.live.com/
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