Re: gEDA-user: Phase and Magnitude of Current

[Yamazaki R2 <yamazakir2@xxxxxxxxx>]

Sorry to randomly jump in here, but in ngspice, the only way to probe
current is to probe a 0V voltage source? Theres no other work arounds
for this? For example, if I had a very large hierachical design with
10,000 transistors in it and I wanted to plot the drain current of one
particular transistor, I'd have to either edit the schematics and
break apart the net and insert a 0V voltage source or hack the
netlist? Isnt that a pretty important missing feautre? Gnucap lets you
probe device currents without hacking the schematics.

On Fri, Apr 10, 2009 at 11:33 AM, John Doty <jpd@xxxxxxxxx> wrote:
>
> On Apr 10, 2009, at 12:19 PM, awchang2@xxxxxxxxxxx wrote:
>
>> So spice won't actually calculate the current for me?
>
> In this particular case, you can also use Ohm's law to convert
> voltage to current through the resistors, and KCL to get the reactive
> currents versus time from your transient simulation. Of course, you
> could also just do it entirely by hand from the complex impedances at
> a given frequency. Spice is a little excessive here.
>
> Lots of ways to do this problem. You want to get good at this? Master
> them all..
>
> John Doty              Noqsi Aerospace, Ltd.
> http://www.noqsi.com/
> jpd@xxxxxxxxx
>
>
>
>
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