I'm writing a circuit simulation program as an exercise adn I'm using the nodal method. I'm currently facing a problem with dependent sources though. Voltage-controlled current sources are fine, but the other three types of dependent sources pose some problems.
I do remember finding some transformations in a book that would convert any type to the voltage-controlled current source type but can't find them.
Can someone provide them?
Ever heard of Thevenin (or Norton ?:-)
...Jim Thompson
Perhaps you refer to Norton and Thévenin equivalent circuits. Read
Goodbye, Norton 'Honeymooner' Carney dead at 85, in November,2003. Art Carney, the funniest sewer worker in New York history and the sidekick who pushed Jackie Gleason's comic star to the heavens in the timeless sitcom "The Honeymooners," has died.
Whatever happened to real slapstick ?:-)
...Jim Thompson
It took not only talent, but a sense of timing and good material, unlike today's so called comics who think comedy is nothing more than a few dirty jokes. Like one old comic said on TV a couple years ago, "Do you know how hard it is to find a good rubber chicken, these days?" No wonder the new comics don't know real comedy!
BTW, If I want dirty jokes, I'll watch more of the political ads.
F*ck, NO! If you're doing this as an "exercise", then tracking them down is a fundamental part of the exercise itself.
And most of us frown on doing other people's homework for them - it keeps them from learning what they're supposed to be learning.
Good Luck! Rich
As you state, voltage-controlled current sources are straightforward to include in the nodal formulation. The source injects a current G(Va-vB) into node N and extracts the same current from node M. This means that you have to add a term -G·Va+G·Vb to the M-th KCL (*) equation and a term G·Va-G·Vb to the N-th KCL equation.
For a VCVS, you have to define an additional unknown Is, which is the current that flows through the voltage source. In the M-th KCL you have to add a term +Is and a -Is term to the N-th equation. Since you have added an unknown, you have to add an equation: V(M)-V(N)=mu(Va-Vb).
For a CCCS, you have to define two different nodes Vc and Vd between which the controlling current flows. You introduce an unknown Ix which has to be added in both equations. The additional equation you have to write is then Vc=Vd.
Finally the CCVS is a combination of both ideas, you have to add two additional unknowns and write two additional equations.
KCL : Kirchoff's Current Law
Hope this helps. If not,
Pere
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