Ring Oscillator SPICE Deck
*** SPICE file created from ringosc.sim, tech=scmos
M1 1 4 212 1 CMOSP L=2.0U W=3.0U
M2 212 4 0 0 CMOSN L=2.0U W=3.0U
M3 208 8 212 0 CMOSN L=3.0U W=4.0U
M4 1 208 206 1 CMOSP L=2.0U W=3.0U
M5 206 208 0 0 CMOSN L=2.0U W=3.0U
M6 202 8 206 0 CMOSN L=3.0U W=4.0U
M7 1 202 200 1 CMOSP L=2.0U W=3.0U
M8 200 202 0 0 CMOSN L=2.0U W=3.0U
M9 196 8 200 0 CMOSN L=3.0U W=4.0U
M10 1 196 194 1 CMOSP L=2.0U W=3.0U
M11 194 196 0 0 CMOSN L=2.0U W=3.0U
M12 190 8 194 0 CMOSN L=3.0U W=4.0U
M13 1 190 188 1 CMOSP L=2.0U W=3.0U
M14 188 190 0 0 CMOSN L=2.0U W=3.0U
M15 184 8 188 0 CMOSN L=3.0U W=4.0U
M16 1 184 182 1 CMOSP L=2.0U W=3.0U
M17 182 184 0 0 CMOSN L=2.0U W=3.0U
M18 178 8 182 0 CMOSN L=3.0U W=4.0U
M19 1 178 176 1 CMOSP L=2.0U W=3.0U
M20 176 178 0 0 CMOSN L=2.0U W=3.0U
M21 172 8 176 0 CMOSN L=3.0U W=4.0U
M22 1 172 170 1 CMOSP L=2.0U W=3.0U
M23 170 172 0 0 CMOSN L=2.0U W=3.0U
M24 166 8 170 0 CMOSN L=3.0U W=4.0U
M25 1 166 164 1 CMOSP L=2.0U W=3.0U
M26 164 166 0 0 CMOSN L=2.0U W=3.0U
M27 160 8 164 0 CMOSN L=3.0U W=4.0U
M28 1 160 158 1 CMOSP L=2.0U W=3.0U
M29 158 160 0 0 CMOSN L=2.0U W=3.0U
M30 133 8 158 0 CMOSN L=3.0U W=4.0U
M31 1 133 131 1 CMOSP L=2.0U W=3.0U
M32 131 133 0 0 CMOSN L=2.0U W=3.0U
M33 1 133 68 1 CMOSP L=2.0U W=3.0U
M34 68 133 0 0 CMOSN L=2.0U W=3.0U
M35 65 8 68 0 CMOSN L=3.0U W=4.0U
M36 1 65 63 1 CMOSP L=2.0U W=3.0U
M37 63 65 0 0 CMOSN L=2.0U W=3.0U
M38 60 8 63 0 CMOSN L=3.0U W=4.0U
M39 1 60 58 1 CMOSP L=2.0U W=3.0U
M40 58 60 0 0 CMOSN L=2.0U W=3.0U
M41 55 8 58 0 CMOSN L=3.0U W=4.0U
M42 1 55 53 1 CMOSP L=2.0U W=3.0U
M43 53 55 0 0 CMOSN L=2.0U W=3.0U
M44 50 8 53 0 CMOSN L=3.0U W=4.0U
M45 1 50 48 1 CMOSP L=2.0U W=3.0U
M46 48 50 0 0 CMOSN L=2.0U W=3.0U
M47 45 8 48 0 CMOSN L=3.0U W=4.0U
M48 1 45 43 1 CMOSP L=2.0U W=3.0U
M49 43 45 0 0 CMOSN L=2.0U W=3.0U
M50 40 8 43 0 CMOSN L=3.0U W=4.0U

M51 1 40 38 1 CMOSP L=2.0U W=3.0U
M52 38 40 0 0 CMOSN L=2.0U W=3.0U
M53 35 8 38 0 CMOSN L=3.0U W=4.0U
M54 1 35 33 1 CMOSP L=2.0U W=3.0U
M55 33 35 0 0 CMOSN L=2.0U W=3.0U
M56 30 8 33 0 CMOSN L=3.0U W=4.0U
M57 1 30 28 1 CMOSP L=2.0U W=3.0U
M58 28 30 0 0 CMOSN L=2.0U W=3.0U
M59 4 8 28 0 CMOSN L=3.0U W=4.0U
C60 172 0 0.038000PF
C61 170 0 0.043000PF
C62 48 0 0.043000PF
C63 50 0 0.037000PF
C64 190 0 0.040000PF
C65 188 0 0.043000PF
C66 133 0 0.128000PF
C67 33 0 0.043000PF
C68 35 0 0.037000PF
C69 200 0 0.043000PF
C70 202 0 0.040000PF
C71 160 0 0.038000PF
C72 158 0 0.043000PF
C73 58 0 0.043000PF
C74 60 0 0.037000PF
C75 178 0 0.038000PF
C76 176 0 0.043000PF
C77 68 0 0.043000PF
C78 43 0 0.043000PF
C79 45 0 0.037000PF
C80 196 0 0.040000PF
C81 194 0 0.043000PF
C82 28 0 0.043000PF
C83 30 0 0.037000PF
C84 212 0 0.043000PF
C85 4 0 0.084000PF
C86 131 0 0.090000PF
C87 166 0 0.038000PF
C88 164 0 0.043000PF
C89 53 0 0.043000PF
C90 55 0 0.037000PF
C91 184 0 0.040000PF
C92 182 0 0.043000PF
C93 38 0 0.043000PF
C94 40 0 0.037000PF
C95 206 0 0.043000PF
C96 208 0 0.040000PF
C97 8 0 0.232000PF
C98 63 0 0.043000PF
C99 65 0 0.037000PF
* CMOSN 0
* CMOSP 1
* GND 0
* OUT 131
* Vdd 1

* Vbias 8
* These SCN-2.0um parameters taken from MOSIS
.MODEL CMOSN NMOS LEVEL=2 LD=0.250000U TOX=408.000001E-10
+ NSUB=6.264661E+15 VTO=0.77527 KP=5.518000E-05 GAMMA=0.5388
+ PHI=0.6 UO=652 UEXP=0.100942 UCRIT=93790.5
+ DELTA=1.000000E-06 VMAX=100000 XJ=0.250000U LAMBDA=2.752568E-03
+ NFS=2.06E+11 NEFF=1 NSS=1.000000E+10 TPG=1.000000
+ RSH=31.020000 CGDO=3.173845E-10 CGSO=3.173845E-10 CGBO=4.260832E-10
+ CJ=1.038500E-04 MJ=0.649379 CJSW=4.743300E-10 MJSW=0.326991 PB=0.800000
.MODEL CMOSP PMOS LEVEL=2 LD=0.213695U TOX=408.000001E-10
+ NSUB=5.574486E+15 VTO=-0.77048 KP=2.226000E-05 GAMMA=0.5083
+ PHI=0.6 UO=263.253 UEXP=0.169026 UCRIT=23491.2
+ DELTA=7.31456 VMAX=17079.4 XJ=0.250000U LAMBDA=1.427309E-02
+ NFS=2.77E+11 NEFF=1.001 NSS=1.000000E+10 TPG=-1.000000
+ RSH=88.940000 CGDO=2.712940E-10 CGSO=2.712940E-10 CGBO=3.651103E-10
+ CJ=2.375000E-04 MJ=0.532556 CJSW=2.707600E-10 MJSW=0.252466 PB=0.800000
Vdd 1 0 dc 5
Vbias 8 0 pulse(5 4 .2u 1n 1n .8u 1.2u)
* Initial conditions set on input capacitor to one inverter to aid dc convergence
* of the initial or start-up state of the ring oscillator
.ic v(160)=0.0
.tran 1n 0.75u uic
.plot v(160) v(8)
* The following "probe" line is for those using PSPICE with PROBE Option
*.probe
.end