Unfortunately most of the above named models' licenses are not compatible to free software rules as defined by DFSG. Therefore since ngspice-28 the va model files are no longer part of the standard ngspice distribution. They may however be downloaded as a 7z archive from the ngspice-28 file distribution folder. After downloading, you may expand the zipped files into your ngspice top level folder. The models enable dc, ac, and tran simulations. Noise simulation is not supported.

Other (foreign) va model files will not compile without code tweaking, due to the limited capabilities of our ADMS installation.