Re: [Ngspice-devel] Ngspice task list

[Paolo N. <pne...@gm...>]

Hi Lionel,

Thanks for this summary of features wanted for ngspice. Since it seems
that you won the maintenance of this document ;) can you add please the
following:

Compact model extraction from ngspice:

> I would like to see a possibility to do the compact models extraction with ngspice.
> For this, one would need to have an option to read external data files (IV, CV, S-par)
> and run some kind of optimization for selected model parameters (i.e. threshold voltage, mobility
> etc). This could also be expended than for simple subcircuits and analog blocks.
> Do you know ASCO optimizer http://asco.sourceforge.net/ which is integrated with
> Qucs?

Can you add this, please.

Ciao,
Paolo



SAINTE CLUQUE Lionel wrote:
> Hi everybody,
> 
> I'm glad so many people answered this topic. It helps in knowing what to
> do. I'm surprised to discover spice identity crisis: It helps in
> knowing, even for us, what spice is and is not...
> 
> As my colleagues know I'm involved in ngpsice, they often ask me some
> features:
> 
> Simulate worst cases:
> When they perform a simulation to guess what happens at -40°C, they
> perform it at the temperature of -100°C. They are not sure spice uses a
> small enough value for bipolar transistor gain. Power electronics
> designers are interested to know if the breaker or current limiter still
> runs with the small beta of a cold transistor (the smaller beta in
> fact), and with the high beta of a hot transistor (the higher in fact).
> For them it is important for bipolar transistors more than mos.
> 
> They asked for saturable core inductore models
> 
> They want to be able to perform an ac simulation with the operating
> point of a given time in a transient simulation.
> For example in a flyback power converter:
> They perform a transient simulation to make the converter set up to the
> nominal output value. For example it sets up in 100ms. They want to
> perform a transfer function analysis at the polarisation of t=100ms to
> verify the regulation loop is stable.
> 
> TBC ...
> 
> Thanks fo your attention
> 
> Lionel
> 
> 
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