*How to read the signal file
Vb5     b5    0    PWL  (T,bsig5  )
Vb5b    b5b   0    PWL  (T,bsig5b )   
Vb6     b6    0    PWL  (T,bsig6  )   
Vb6b    b6b   0    PWL  (T,bsig6b )   
Vb7     b7    0    PWL  (T,bsig7  )   
Vb7b    b7b   0    PWL  (T,bsig7b )   
Vb8     b8    0    PWL  (T,bsig8  )   
Vb8b    b8b   0    PWL  (T,bsig8b )   
Vb9     b9    0    PWL  (T,bsig9  )   
Vb9b    b9b   0    PWL  (T,bsig9b )   
Vb10    b10   0    PWL  (T,bsig10 )   
Vb10b   b10b  0    PWL  (T,bsig10b)   

Vd1     d1    0    PWL  (T,dsig1  )   
Vd1b    d1b   0    PWL  (T,dsig1b )
Vd2     d2    0    PWL  (T,dsig2  )   
Vd2b    d2b   0    PWL  (T,dsig2b )
Vd3     d3    0    PWL  (T,dsig3  )   
Vd3b    d3b   0    PWL  (T,dsig3b )
Vd4     d4    0    PWL  (T,dsig4  )   
Vd4b    d4b   0    PWL  (T,dsig4b )
Vd5     d5    0    PWL  (T,dsig5  )   
Vd5b    d5b   0    PWL  (T,dsig5b )
Vd6     d6    0    PWL  (T,dsig6  )   
Vd6b    d6b   0    PWL  (T,dsig6b )
Vd7     d7    0    PWL  (T,dsig7  )   
Vd7b    d7b   0    PWL  (T,dsig7b )
Vd8     d8    0    PWL  (T,dsig8  )
Vd8b    d8b   0    PWL  (T,dsig8b )
Vd9     d9    0    PWL  (T,dsig9  )   
Vd9b    d9b   0    PWL  (T,dsig9b )
Vd10    d10   0    PWL  (T,dsig10 )   
Vd10b   d10b  0    PWL  (T,dsig10b)
Vd11    d11   0    PWL  (T,dsig11 )   
Vd11b   d11b  0    PWL  (T,dsig11b)
Vd12    d12   0    PWL  (T,dsig12 )   
Vd12b   d12b  0    PWL  (T,dsig12b)
Vd13    d13   0    PWL  (T,dsig13 )   
Vd13b   d13b  0    PWL  (T,dsig13b)
Vd14    d14   0    PWL  (T,dsig14 )   
Vd14b   d14b  0    PWL  (T,dsig14b)
Vd15    d15   0    PWL  (T,dsig15 )   
Vd15b   d15b  0    PWL  (T,dsig15b)

.TRAN DATA=PWL_SIG
.OPTION POST INGOLD=2 NUMDGT=10 DELMAX=100p METHOD=GEAR ACCURATE=1
.OP

.PROTECT
.INCLUDE 'PWL_Vref.sp'    
.lib 'mm018.l' TT  
.UNPROTECT
.END