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Simulators >> Circuit Simulators >> regarding the spice3f4
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Message started by anil on Nov 5^th, 2005, 1:47am

Title: regarding the spice3f4
Post by anil on Nov 5^th, 2005, 1:47am

Hai all,

My name is anil. I am new to this group.

Hope someone can help me regarding the spice3f4

I am trying to know how the netlist is converted into datastructure

First of all, after writing a netlist , it convert into a circuit then it convert into matrix before doing nodal analysis [I] = [G][V]

It uses the matrix such incident matrix or adjancy matrix etc..

I want to know exactly which matrix type does it uses. If anyone had alreadylook the code, then they may know it.

I want to know how the spice does?

If anyone have idea or documentation regarding the inside spice , plz let me know

Hope someone can help me

Thank you

Regards,
anil :)

Title: Re: regarding the spice3f4
Post by vborich on Nov 5^th, 2005, 5:52pm

It uses the modified node admittance (MNA) matrix, as do most other circuit simulators.

Title: Re: regarding the spice3f4
Post by rf-design on Nov 6^th, 2005, 12:57pm

Sorry the best doc is the source code, but the general method is described in the book

Inside Spice

and the detailed matrix derivation in

Computer-Aided Analsysis of electronic circuits: algorithms & computational techniques; Leon O. Chua & Pen-Min Lin

29 years old but still a reference for starting. Later improvements of implementation techniques are very are found in books.