gEDA-user: TwoStageAmp example

[John Doty]

On Apr 2, 2007, at 11:19 AM, al davis wrote:

>
> The current snapshot has plugins with the complete set of BSIM
> models, from the oldest up to the new BSIM460 that hasn't made
> it to most commercial simulators yet.  There is also
> a "spice3f5" set, and a "ngspice17" set.  You attach the ones
> you want, and the rest don't get in the way.

Sounds wonderful. Is it sufficiently compatible with SPICE that I can  
feed it an HSPICE netlist to describe the circuit itself? I don't  
care about commanding the simulation in some other language, but I've  
been working with a VLSI layout contractor that uses HSPICE netlists  
as an interchange format and a fab house that distributes BSIM  
parameters in HSIPCE format. I generate HSPICE netlists from the  
schematic, check them in simulation, and submit them to the  
contractor. I get back huge, flat "parameter extraction" HSPICE  
netlists for more simulation. I've been using ngspice with a  
customized spicepp.pl successfully, but there are issues. The bigger  
transient simulations bring ngspice to its knees without careful  
tuning, and noise simulations produce nonsense.

John Doty              Noqsi Aerospace, Ltd.
jpd at noqsi.com