As I know,
no command to check MOS's sat.,linear, and cut-off... But my friend wrote a perl to grep and analyze MOSs working on which region. Basically, it uses Vds(>,<,=)Vgs-Vt
node cap
--> .options captab
node impedence
--> 1. think of voltage drop divided by id(for large signal)
2. ro=dVds/dId ~ 1/[(channel-length modulation coefficient)*Id]
3. read reference to define which stage your circuit is, then plug into a simplified formula to get output impendence.
What do you need node impendence for??
comments?