google / globalfoundries-pdk-libs-gf180mcu_fd_pr

Primitives for GF180MCU provided by GlobalFoundries.
https://gf180mcu-pdk.rtfd.io
Apache License 2.0
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`DTEMP` of transistor models are disconnected #121

Open GlenHertz opened 10 months ago

GlenHertz commented 10 months ago

The transistors with a .subckt wrapper have dtemp on the .subckt line but dtemp isn't passed to the model instance so it does nothing. For example: https://github.com/google/globalfoundries-pdk-libs-gf180mcu_fd_pr/blob/9f992d5a9186d1f7820c58f039c484ad35b2edea/models/ngspice/sm141064.ngspice#L47034-L47057

Would you accept a fix that does this?

.subckt nmos_6p0 d g s b w=1e-5 l=7e-7
+ as=0 ad=0 ps=0 pd=0 nrd=0 nrs=0 par=1 dtemp=0
+ sa=0 sb=0 nf=1 sd=0 m=1

.param
+ par_vth=0.01155  
+ par_k=0.0000  
+ par_l=4e-7
+ par_w=-5e-7
+ par_leff='l-par_l'
+ par_weff='par*(w-par_w)'
+ p_sqrtarea='sqrt((par_leff)*(par_weff))'

.param
+ var_k='0.7071*par_k* 1e-06 / p_sqrtarea'
+ mis_k=agauss(0,var_k,1)

.param
+ var_vth='0.7071*par_vth* 1e-06 / p_sqrtarea'
+ mis_vth=agauss(0,var_vth,1)

m0 d g s b nmos_6p0 w=w l=l as=as ad=ad ps=ps pd=pd nrd=nrd nrs=nrs 
+delvto='mis_vth*sw_stat_mismatch'  sa=sa sb=sb nf=nf sd=sd dtemp=dtemp
.ends nmos_6p0
GlenHertz commented 10 months ago

Hmm, it doesn't seem like BSIM4 supports TEMP or DTEMP on the model instance line. Just global .TEMP 27 is supported. Should dtemp be removed on the .subckt line?