*Sample netlist for BSIM6.0
.option abstol=1e-6 reltol=1e-6 post ingold
* (exec-spice "ngspice %s" t)

.include "modelcard.nmos"

* --- Voltage Sources ---
vd d  0 dc=50m
vg g  0 dc=0.0
vs s  0 dc=0.0
vb b  0 dc=0.0

* --- Transistor ---
M1 d g s b   mn W = 10e-6 L = 10e-6

* --- DC Analysis ---
.dc vg -1.3 1.3 0.01 vb -0.3 0 0.1

.probe dc ids=par'-i(vd)'
.probe dc gm=deriv(ids)
.probe dc gm2= deriv(gm)
.print dc par'ids' par'gm' par'gm2' i(vd)
.control
run
plot -i(vd)
.endc
.end