.model x33 npn bf=80 rb=100 vaf=50 tf=.3e-9 tr=6.e-9

.subckt inv 5 1 6 0
q1 3 2 0 x33
q2 6 4 0 x33
rc1 5 3 1k
rc2 5 6 1k
rb1 1 2 10k
rb2 3 4 10k
.ends inv
**bjt inverter test
vcc 5 0 5.
x1 5 1 6 0 inv
x2 5 6 10 0 inv
x3 5 10 11 0 inv
x4 5 11 12 0 inv
x5 5 12 13 0 inv
x6 5 13 14 0 inv
*.end