I was looking for simple resistor spice model, and came across this:

+rsh = 40           dw = 0              dl = 0              
+tc1 = 0            tc2 = 0             pvc1 = 0              
+pvc2 = 0           pvc3 = 0              
+teff = 1+tc1*temp+tc2*temp*temp 
R0 ( p n ) resistor r=rsh*(l-dl)/(w-dw)*teff*(1+pvc1*(tanh(pvc2*abs(v(p,n)/(l-dl))+pvc3)-tanh(pvc3)))


I am pretty familiar with almost all of typical resistor parameters, but I can't find any information about that particular resistance equation and any of the "pvc" parameters. Specially about this part:


Where does this equation come from? Where can I find out more about it?

UPD: This is probably on-silicon model

  • 1
    \$\begingroup\$ So exactly where did you "come across" this model? Give us some context. \$\endgroup\$ Sep 19, 2019 at 14:46
  • \$\begingroup\$ given the 'rsh' which could be a resistance_sheet, this is an on-silicon model \$\endgroup\$ Sep 19, 2019 at 16:39
  • \$\begingroup\$ @analogsystemsrf I know about 'rsh' already, but i can't really find any information about the second part of the equation \$\endgroup\$
    – user232380
    Sep 20, 2019 at 4:28
  • \$\begingroup\$ @Elliot Alderson princeton.edu/~nverma/cadenceSetup_6.1.7/gpdk090_v4.4/models/… I think that a 90 nm model from the gpdk library. \$\endgroup\$
    – user232380
    Sep 20, 2019 at 4:28

1 Answer 1


pvc* could be "process variation coefficient " similarly to the tc* which i'd read to be "temperature coefficient " when used in the way they are to produce a value for teff.

  • \$\begingroup\$ That sounds believable. Can you provide any additional information, links or articles about this? \$\endgroup\$
    – user232380
    Sep 20, 2019 at 6:17
  • \$\begingroup\$ Regrettably, I can't. This is purely speculation from looking at models for power devices then analysing how they're structured and how they structure equations for values such as R_ds-on. \$\endgroup\$
    – hooskworks
    Sep 20, 2019 at 7:59
  • \$\begingroup\$ Well, anyway, thanks. I will wait one or two days (this part of StackExchange is pretty idle sometimes) and close the question with your answer. \$\endgroup\$
    – user232380
    Sep 20, 2019 at 8:14

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