print vss, vdd, A, B, C, F
plot vss, vdd, A, B, C, F
option level = 3 
option simperiod = 16 
option sigunit = 1.000000e-08 
option outacc = 100p
option simperiod = 16 
/*
*%
tstep 0.2n
trise 0.5n
tfall 0.5n
*%
*%
.options cptime=500
*%
*/
set vdd = h*16 
set vss = l*16 
set A = l*1 h*1 l*1 h*1 l*1 h*1 l*1 h*1 l*1 h*1 l*1 h*1 l*1 h*1 l*1 h*1 
set B = l*2 h*2 l*2 h*2 l*2 h*2 l*2 h*2 
set C = l*4 h*4 l*4 h*4 
