RE: [ng-spice-devel] Use Initial Conditions problem in Spice 3f5.
> With UIC specified...
> sources start at zero, regardless of their dc value or their initial
> transient value.
> Also, I think that capacitors with no initial condition
> specified start with
> 0 volts across them.
As far as I understand it, that's what UIC is supposed to
do. There's no initial attempt at a DC solution, and everything
starts either at 0, or at the IC defined on the device line.
With the .IC card, spice will actually try to find initial
convergance with all the nodes held as they're defined on the
.IC line. I can't remember if Berkeley Spice uses the IC=
parameter on the devices in this mode. Some Spices do, others
don't.
The whole area of .IC, IC= and UIC has been interpreted
different ways by different Spices. Maybe we should state
a definition.
Cheers,
Alan
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