Requires: SmartSpice & Smartview

Minimum Versions: SMARTSPICE 3.16.12.R

Example 4 illustrates The input deck file …..

Input Files

mod1.in

Parametric analysis
***** Circuit description
vcc vss 0  DC vccDC
vin inp 0  PULSE(0 3 0 trtf trtf  10ns 40ns)
m1 2  inp  vss  vss  pm  w=wp   l=1.6u
m2 2  inp  0    0    nm  w=30u  l=2.0u
cout  2  0  50ff 
.MODEL  pm  PMOS ( level=3 tox=.02e-6
+ phi=0.576 gamma=0 vto=0 alpha=0 kappa=0)
.model  nm  NMOS ( level=3 tox=.02e-6
+ phi=0.576 gamma=0 vto=0 alpha=0 kappa=0)
***** Analysis statement
.TRAN 0.1ns 25ns
***** Measure statements
.MEASURE TRAN delrise DELAY v(inp) RISE=1 VAL=1.5
+      TARG=v(2) FALL=1 VAL='0.5*vccDC' 
.MEASURE TRAN maxv2 MAX  v(2) 
.MEASURE TRAN delfall DELAY v(inp) FALL=1 VAL=1.5
+      TARG=v(2) RISE=1 VAL='0.5*maxv2' 
***** Parameter labels
.PARAM vccDC= 5V wp=4.9u  trtf=1ns
***** Parametric analysis  specification
.MODIF proff  prtbl m2(w)=32.6u  LOOP=6 vccDC+=(4.5)0.1v    
+MODIF proff  prtbl     TEMP=75  LOOP=6 vccDC+=(4.5)0.1v    
.options nomod
.END

opTR.in

Address Buffer 
* Optimization of rise and fall delays
***** Circuit
vin  inp  0  DC 1.5  PULSE( 0.4 2.6 0 5N 5N 15N )  
vcc  vss  0  DC vccdc
m1  2    inp   vss   vss   pm   W=5.067U   L=1.6U
m2  2    inp   0     0     nm   W=34.82U   L=2.0U 
m3  3    2     vss   vss   pm   W= 50u     L=1.1U
m4  3    2     0     0     nm   W=70.U     L=1.0U 
m5  4    3     vss   vss   pm   W=320.U    L=1.1U
m6  4    3     0     0     nm   W=440.U    L=1.1U 
m7  out  4     vss   vss   pm   W=parm7w   L=1.1U
m8  out  4     0     0     nm   W=parm8w   L=1.1U 
m9  0  out     0     0     nm   W=380U     L=1.2U 
COUT  out  0  700p
***** Models
.MODEL  pm  PMOS ( level=3 tox=.02e-6
+ phi=0.576 gamma=0 vto=0 alpha=0 kappa=0 is=0)
.model  nm  NMOS ( level=3 tox=.02e-6
+ phi=0.576 gamma=0 vto=0 alpha=0 kappa=0 is=0)
***** Analysis statement
.TRAN 0.2NS 40NS CALLV SAVEV
***** Parameter labels 
.PARAM  parm7w=500u parm8w=500u vccdc=4.5 
***** Measure statements
.MEASURE TRAN del_R DELAY  v(inp) RISE=1 VAL=1.5 
+  TARG=v(out) RISE=1  VAL= 'vccdc/2'
.MEASURE TRAN del_F DELAY  v(inp) FALL=1 VAL=1.5 
+  TARG=v(out) FALL=1 VAL='vccdc/2'  
***** Optimization specification
.MODIF  TEMP= 75  vccdc=4.5
+     OPTIMIZE  parm7w=opt(10u 3000u 500U)
+               parm8w=opt(10u 3000u 500U)
+               m3(w)=opt(10u 300u 50U)
+               m4(w)=opt(10u 300u 70U)
+               m5(w)=opt(100u 1000u 320U)
+               m6(w)=opt(50u 1000u 440U)
+      TARGETS      del_f=3ns  del_r=3ns
+      OPTIONS    AVG=0.001 MEASOFF=0  
***** Interactive plot
.OPTIONS iplot_one nomod
.IPLOT v(out) v(inp) 
.END