You just instantiate the device in exactly the same way you would any other component - the exception being that the connections have to be implicit (i.e. by order rather than by name) and the parameters have to explicit (i.e. by name rather than by order).

Code:

nch #(.l(500.0n), .w(1u))  M0 ( b, a, c, \bulk_n_gnd!  ); 

You then need to provide a MODELPATH (probably in the hdl.var file) to tell it where to pick up the spectre models from (see the documentation for more details on the syntax).

That's it. It's pretty easy really.

In the past, it used to be necessary to provide an "apt" file alongside the model file, but this has not been needed since LDV51. If using an earlier version (you should really change to use a more recent version), you can use the genalgprim command to generate this apt file.

Regards,

Andrew.

The \bulk_n_gnd! is just a net name which contains an illegal character ! and so has to be escaped. In practice the example I stole it from had an inherited connection - the details of which I'm not going to go into here (I just stole the example out of a netlist that had been produced from a DFII schematic).

Regards,

Andrew.

This normally indicates that some of the parameters which specify the junction capacitances etc are missing in the model. The model is probably simplified.

Andrew.