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