.MODEL NPNBJT NPN
+is =4.8e-18 bf =100 nf =1
+ikf =0.00096
+br =8 nr =1
+ikr =0.02
+rb =200
+re =15 rc =150
+cje =1.5e-14 mje =0.5
+tf =2e-11 xtf =100 vtf =3
+itf =0.04 tr =4e-10
+cjc =2e-14 mjc =0.5
+cjs =8e-14
+mjs =0.5
+

.model nenh nmos
+level =2
+vto =0.626634 kp =5.28837e-05 gamma =0.287822
+phi =0.880849
+
+cgso =2.89e-10 cgdo =2.89e-10
+rsh =68 cj =0.000345
+mj =0.916 cjsw =1.74e-10 mjsw =0.195
+tox =2.25e-08 nsub =9.31807e+16
+nss =3e+10 nfs =0.01 tpg =1
+xj =9e-07 ld =0 uo =511.152
+ucrit =200 uexp =0.0161578
+vmax =57064.3 neff =0.261026
+
+delta =3.02002

.model penh pmos
+level =2
+vto =-0.617486 kp =1.93032e-05 gamma =0.527415
+phi =0.85
+
+cgso =3.35e-10 cgdo =3.35e-10
+rsh =154 cj =0.000421
+mj =0.3285 cjsw =2.23e-10 mjsw =0.307
+tox =2.25e-08 nsub =8.55587e+14
+nss =3e+10 nfs =1e+11 tpg =-1
+xj =5.03159e-09 ld =6e-08 uo =33.9632
+ucrit =98755.5 uexp =0.141605
+vmax =6786.31 neff =12.182
+
+delta =6.01138

.subckt inv 1 4 5  0
M1 2 1 5 5 penh l=1e-06 w=3.33e-05 
+ as=0 ad=0 ps=0 pd=0 
M2 2 1 0 0 nenh l=1e-06 w=5e-06 
+ as=0 ad=0 ps=0 pd=0 
M3 4 1 3 0 nenh l=1e-06 w=2e-05 
+ as=0 ad=0 ps=0 pd=0 
M4 3 2 0 0 nenh l=1e-06 w=5e-06 
+ as=0 ad=0 ps=0 pd=0 
Q1 5 2 4 0 NPNBJT 
Q2 4 3 0 0 NPNBJT 
CL 4 0 1e-12
.ends inv
*ring11.sp SPICE FILE
x01 1 2 25  0 inv
x02 2 3 25  0 inv
x03 3 4 25  0 inv
x04 4 5 25  0 inv
x05 5 6 25  0 inv
x06 6 7 25  0 inv
x07 7 8 25  0 inv
x08 8 9 25  0 inv
x09 9 10 25  0 inv
x10 10 11 25  0 inv
x11 11 1 25  0 inv
Vz25 25 0 6 
*.end