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Re: [Help-gnucap] Simulating progress over time with gnucap
From: |
al davis |
Subject: |
Re: [Help-gnucap] Simulating progress over time with gnucap |
Date: |
Tue, 27 Jun 2006 14:10:52 -0400 |
User-agent: |
KMail/1.9.1 |
On Tuesday 27 June 2006 14:28, Daniel Kraft wrote:
> I'm new to gnucap and want to use it for some simulation. I
> need to simulate the currency flows over time, but I couldn't
> find out yet how to do a time-based simulation (for instance,
> of an RLC circuit).
>
> Just using a dc-command seems to be somewhat statically to
> me.
Transient analysis (transient or tran command) .
Linear DC analysis is boring. A few years ago, when I was
teaching a senior level C++ programming class for EE's, I had
them write a simple DC analysis simulator as a homework
assignment. The results were wonderful. They finally really
learned the basic concepts that officially are covered in the
circuits-1 course. They also learned how to organize a
program, object oriented programming concepts, ... all on one
homework assignment!
In gnucap, (and also Spice) the DC analysis is intended for
analyzing static conditions, like the DC operating point of a
transistor circuit. Once you have established the DC operating
point, you can do an AC small signal analysis (AC command), a
fully nonlinear transient analysis (tran), a spectrum analysis
(Fourier), with lots of variations.