Hi, forum,
I wonder if you have c&c (clear and concise) definitions
for digital ckt, analog ckt, mixed-signal ckt and RF ckt.

I used different circuit simulators: standard spice
simulators, relaxation/partitioning-based fast spice simulators,
and RF/HF simulator.  And I hear the terms many times, like:
Fast-spice simulators can not be used for analog ckt;
Nanosim is a mixed-signal simulator;
...

However, I have never figured out "who's who''.

Any inputs are highly appreciated.

Thanks.

--Charile