Cut&Paste error in statistical parameter file

[dwarning]

Looking into file IHP-Open-PDK/ihp-sg13g2/libs.tech/ngspice/models/cornerMOSlv.lib we see in typical (tt) section (abbreviated for better readability):
`
LIB mos_tt
param sg13g2_lv_nmos_vfbo_mm= 1.0
param sg13g2_lv_nmos_ctl = 1.2080
param sg13g2_lv_nmos_rsw1 = 0.7200
param sg13g2_lv_nmos_muew = 0.8500
param sg13g2_lv_nmos_dphibo = 0.9915
param sg13g2_lv_nmos_dphibl = 0.9693

param sg13g2_lv_pmos_vfbo_mm= 1.0
param sg13g2_lv_pmos_ctl = 1.9570
param sg13g2_lv_pmos_rsw1 = 0.7720
param sg13g2_lv_pmos_muew = 1.0520
param sg13g2_lv_pmos_dphibo = 0.9050
param sg13g2_lv_pmos_dphibl = 0.8550

include sg13g2_moslv_mod.lib
ENDL mos_tt`

So we see that we have different parameters (act as factor) for nmos and pmos.
Next section is for statistical simulation in typical corner:
`
LIB mos_tt_stat
param sg13g2_lv_nmos_vfbo_mm_norm= 1.0
param sg13g2_lv_nmos_ctl_norm = 1.2080
param sg13g2_lv_nmos_rsw1_norm = 0.7200
param sg13g2_lv_nmos_muew_norm = 0.8500
param sg13g2_lv_nmos_dphibo_norm = 0.9915
param sg13g2_lv_nmos_dphibl_norm = 0.9693

param sg13g2_lv_pmos_vfbo_mm_norm= 1.0
param sg13g2_lv_pmos_ctl_norm = 1.2080
param sg13g2_lv_pmos_rsw1_norm = 0.7200
param sg13g2_lv_pmos_muew_norm = 0.8500
param sg13g2_lv_pmos_dphibo_norm = 0.9915
param sg13g2_lv_pmos_dphibl_norm = 0.9693

include sg13g2_moslv_stat.lib
include sg13g2_moslv_mod.lib
ENDL mos_tt_stat`

The problem is that the nmos parameter are taken over from tt section into the stat section - but pmos not. They are a simple copy of the nmos parameter. Looks like a cut and paste error and follows in wrong results for tt_stat pmos simulations.

Other sections in lv and hv Corner lib have not this bug.

BTW - I see no need to create additional parameter for statistical simulation with _norm in the end of name. Just using the tt, ff, ss parameter is sufficient.

@miesli : In case you are still there, can you comment please.

[dwarning]

Another case of Cut&Paste in sg13g2_moslv_stat.lib (abbreviated):

param sg13g2_lv_nmos_vfbo_mm ='gauss(sg13g2_lv_nmos_vfbo_mm_norm , 0.004, mc_ok)'
param sg13g2_lv_nmos_toxo ='gauss(sg13g2_lv_nmos_toxo_norm, 0.0133, mc_ok)'
param sg13g2_lv_nmos_dphibo ='gauss(sg13g2_lv_nmos_dphibo_norm, 0.0656, mc_ok)'
param sg13g2_lv_nmos_dphibl ='gauss(sg13g2_lv_nmos_dphibl_norm, 0.1135, mc_ok)'
param sg13g2_lv_nmos_dphibw ='gauss(sg13g2_lv_nmos_dphibw_norm, 0.1197, mc_ok)'
param sg13g2_lv_nmos_dphiblw ='gauss(sg13g2_lv_nmos_dphiblw_norm, 0.0135, mc_ok)'
param sg13g2_lv_nmos_toxovo ='gauss(sg13g2_lv_nmos_toxovo_norm, 0.0133, mc_ok)'

param sg13g2_lv_pmos_vfbo_mm ='gauss(sg13g2_lv_pmos_vfbo_mm_norm, 0.004, mc_ok)'
param sg13g2_lv_pmos_toxo ='gauss(sg13g2_lv_pmos_toxo_norm, 0.0133, mc_ok)'
param sg13g2_lv_pmos_dphibo ='gauss(sg13g2_lv_pmos_dphibo_norm, 0.0656, mc_ok)'
param sg13g2_lv_pmos_dphibl ='gauss(sg13g2_lv_pmos_dphibl_norm, 0.1135, mc_ok)'
param sg13g2_lv_pmos_dphibw ='gauss(sg13g2_lv_pmos_dphibw_norm, 0.1197, mc_ok)'
param sg13g2_lv_pmos_dphiblw ='gauss(sg13g2_lv_pmos_dphiblw_norm, 0.0135, mc_ok)'
param sg13g2_lv_pmos_toxovo ='gauss(sg13g2_lv_pmos_toxovo_norm, 0.0133, mc_ok)'

It's unbelievable that the variations of lv nmos and pmos are identical. hv nmos statistical is not affected.

[metroid120]

Hi Dietmar, you are right in both cases this is very likely a bug. In the closed PDK the pmos parameters are different. Our bad...
It is a long time ago that we did this and I have no memory what could have happened. Anyhow.

1. Here would be the correct values for the file ""cornerMOSlv.lib" (starting line 137):

.param sg13g2_lv_pmos_vfbo_mm_norm= 1.0
 .param sg13g2_lv_pmos_ctl_norm    = 1.9570
 .param sg13g2_lv_pmos_rsw1_norm   = 0.7720
 .param sg13g2_lv_pmos_muew_norm   = 1.0520
 .param sg13g2_lv_pmos_dphibo_norm = 0.9050
 .param sg13g2_lv_pmos_dphibl_norm = 0.8550
 .param sg13g2_lv_pmos_dphibw_norm = -1.5800
 .param sg13g2_lv_pmos_dphiblw_norm= 1.0000
 .param sg13g2_lv_pmos_themuo_norm = 0.9580
 .param sg13g2_lv_pmos_thesatl_norm= 0.5510
 .param sg13g2_lv_pmos_thesatw_norm= 1.0800
 .param sg13g2_lv_pmos_thesatlw_norm= 1.0000
 .param sg13g2_lv_pmos_toxo_norm   = 1.0000
 .param sg13g2_lv_pmos_toxovo_norm = 1.0000
 .param sg13g2_lv_pmos_cjorbot_norm= 1.0000
 .param sg13g2_lv_pmos_cjorsti_norm= 1.0000
 .param sg13g2_lv_pmos_cjorgat_norm= 1.0000

2. For file sg13g2_moslv_stat.lib (starting line 38):

.param sg13g2_lv_pmos_vfbo_mm  ='gauss(sg13g2_lv_pmos_vfbo_mm_norm,  0.004, mc_ok)'
.param sg13g2_lv_pmos_toxo     ='gauss(sg13g2_lv_pmos_toxo_norm,     0.0133, mc_ok)'
.param sg13g2_lv_pmos_dphibo   ='gauss(sg13g2_lv_pmos_dphibo_norm,   0.1078, mc_ok)'
.param sg13g2_lv_pmos_dphibl   ='gauss(sg13g2_lv_pmos_dphibl_norm,   0.1412, mc_ok)'
.param sg13g2_lv_pmos_dphibw   ='gauss(sg13g2_lv_pmos_dphibw_norm,   1.4858, mc_ok)'
.param sg13g2_lv_pmos_dphiblw  ='gauss(sg13g2_lv_pmos_dphiblw_norm,  1e-9, mc_ok)'
.param sg13g2_lv_pmos_toxovo   ='gauss(sg13g2_lv_pmos_toxovo_norm,   0.0133, mc_ok)'
.param sg13g2_lv_pmos_ctl      ='gauss(sg13g2_lv_pmos_ctl_norm,      0.1880, mc_ok)'
.param sg13g2_lv_pmos_muew     ='gauss(sg13g2_lv_pmos_muew_norm,     0.0235, mc_ok)'
.param sg13g2_lv_pmos_themuo   ='gauss(sg13g2_lv_pmos_themuo_norm,   0.0247, mc_ok)'
.param sg13g2_lv_pmos_rsw1     ='gauss(sg13g2_lv_pmos_rsw1_norm,     0.0727, mc_ok)'
.param sg13g2_lv_pmos_thesatl  ='gauss(sg13g2_lv_pmos_thesatl_norm,  0.1718, mc_ok)'
.param sg13g2_lv_pmos_thesatw  ='gauss(sg13g2_lv_pmos_thesatw_norm,  0.0427, mc_ok)'
.param sg13g2_lv_pmos_thesatlw ='gauss(sg13g2_lv_pmos_thesatlw_norm, 0.1667, mc_ok)'
.param sg13g2_lv_pmos_cjorbot  ='gauss(sg13g2_lv_pmos_cjorbot_norm,  0.0267, mc_ok)'
.param sg13g2_lv_pmos_cjorsti  ='gauss(sg13g2_lv_pmos_cjorsti_norm,  0.0267, mc_ok)'
.param sg13g2_lv_pmos_cjorgat  ='gauss(sg13g2_lv_pmos_cjorgat_norm,  0.0267, mc_ok)'

Please double check these values and let me know if you agree.

[dwarning]

Hi Markus,
yes I so I made it in my PR yesterday.
Few parameters looking strange (e.g. dphibw), I will check it.
Thanks for taking care,
Dietmar