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Tue Feb 16 18:19:12 EST 2016

## Spice: taking a stab at working with equations

Two things need to be distinguished:
- Primitive equations that relate currents, voltages and time
- Spice's GV=I approach.
I'm currently more interested in building a good representation of the
equations, and then find mappings of that that will answer questions.
E.g. sensitivities: effect of circuit parameter on some computable
property.
The full equation is a first order, non-linear differential equation.
The state variables can be currents and voltages. However, they
generally are voltages, as inductors are rare and can be omitted on
the first try. ( And could be replaced by gyrators? )
( Re-reading from october 2015. Essentially going through the same
thing. )

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