inverter.sp

self-biased voltage reference

*inverter

.option post probe
.include cmos06.mod
.param Ls=1.6u  W2=12u

mst1 st2 st1 vdd vdd   cmosp w=0.6u       l=0.6u as='Ls*0.6u' ad='Ls*0.6u' ps='2*Ls+0.6u' pd='2*Ls+0.6u'
mst2 st2 st1 vss vss   cmosn w=W2         l=0.6u as='Ls*6u' ad='Ls*6u' ps='2*Ls+6u' pd='2*Ls+6u'

vdd	vdd	0	5	
vss vss 0 0

vin st1 0 1.8u

c1 st2 vss 5p

.dc	vin	0	5.5	0.1
.probe v(st2)
.alter
.param W2=6u
.alter
.param W2=3u
.alter
.param W2=0.6u

.op

.end