Type Name: r
The resistor model consists of process-related device data that allow the resistance to be calculated from geometric information and to be corrected for temperature. The parameters available are:
The sheet resistance is used with the narrowing parameter and l and w from the resistor element line to determine the nominal resistance by the formula
Resistor Model Parameters name parameter units default example tc1 first order temperature coeff. /C
0.0 - tc2 second order temperature coeff. /C2
0.0 - rsh sheet resistance /
- 50 defw default width M 1e-6 2e-6 narrow narrowing due to side etching M 0.0 1e-7 tnom parameter measurement temperature C 27 50
R = rsh . (l - narrow)/(w - narrow).
The parameter defw is used to supply a default value for w if one is not specified on the device line. If either rsh or l is not specified, then the standard default resistance value of 1k is used.
After the nominal resistance is calculated, it is adjusted for temperature by the formula:
R(temp) = R(tnom) . (1 + tc1 . (temp-tnom) + tc2 . (temp-tnom)2)