*  CMOS Ring oscillator (7 inverters)
*
*  Transistors :
mq1n   2     1     0     0     CMOSN l=3u w=4.5u
mq1p   2     1   100   100     CMOSP l=3u w=4.5u
mq2n   3     2     0     0     CMOSN l=3u w=4.5u
mq2p   3     2   100   100     CMOSP l=3u w=4.5u
mq3n   4     3     0     0     CMOSN l=3u w=4.5u
mq3p   4     3   100   100     CMOSP l=3u w=4.5u
mq4n   5     4     0     0     CMOSN l=3u w=4.5u
mq4p   5     4   100   100     CMOSP l=3u w=4.5u
mq5n   6     5     0     0     CMOSN l=3u w=4.5u
mq5p   6     5   100   100     CMOSP l=3u w=4.5u
mq6n   7     6     0     0     CMOSN l=3u w=4.5u
mq6p   7     6   100   100     CMOSP l=3u w=4.5u
mq7n   1     7     0     0     CMOSN l=3u w=4.5u
mq7p   1     7   100   100     CMOSP l=3u w=4.5u
*
*  Voltage cards :
vdd 100     0     dc     5V
*
*  Analysis cards :
.tran 100ps 1ns
.plot tran v(1) v(7)
.ic v(1)=0 v(3)=0 v(5)=0 v(7)=0
*
*  Model cards :
.MODEL CMOSN NMOS (VTO=0.83 KP=33U GAMMA=1.36 PHI=0.6
+ LAMBDA=0.016 PB=0.8 JS=10N LD=0.28U TOX=50N NSUB=1E16
+ UO=200 UEXP=0.1 UCRIT=4E4 VMAX=100K XJ=0.4U
+ DELTA=1.24 NFS=0 NEFF=2 NSS=0 TPG=1.0 RSH=25
+ CGSO=0.5N CGDO=0.5N CJ=0.32M MJ=0.5 CJSW=0.9N MJSW=0.33
+ CGBO=0 FC=0.5 LEVEL=2)
.MODEL CMOSP PMOS (VTO=-0.89 KP=15U GAMMA=0.88 PHI=0.6
+ LAMBDA=0.047 PB=0.8 JS=10N LD=0.28U TOX=50N NSUB=1.12E14
+ UO=100 UEXP=0.1 UCRIT=20E4 VMAX=100K XJ=0.4U
+ DELTA=1.94 NFS=0 NEFF=2 NSS=0 TPG=-1.0 RSH=95
+ CGSO=0.4N CGDO=0.4N CJ=0.2M MJ=0.5 CJSW=0.45N MJSW=0.33
+ CGBO=0 FC=0.5 LEVEL=2)
.end