4.0 Resistor Models¶
Resistor Model |
Description |
npolyf_u |
3-T Model for unsalicided N+ poly resistor |
ppolyf_u |
3-T Model for unsalicided P+ poly resistor |
ppolyf_u_1k |
3-T Model for 1k ohm hi sheet rho P poly resistor (3.3V) |
ppolyf_u_2k |
3-T Model for 2k ohm hi sheet rho P poly resistor (3.3V) |
ppolyf_u_1k_6p0 |
3-T Model for 1k ohm hi sheet rho P poly resistor (6.0V) |
ppolyf_u_2k_6p0 |
3-T Model for 2k ohm hi sheet rho P poly resistor (6.0V) |
ppolyf_u_3k |
3-T Model for 3k ohm hi sheet rho P poly resistor (3.3V & 6V) |
nplus_u |
3-T Model for unsalicided N+ diffusion resistor |
pplus_u |
3-T Model for unsalicided P+ diffusion resistor |
npolyf_s |
3-T Model for salicided N+ poly resistor |
ppolyf_s |
3-T Model for salicided P+ poly resistor |
nplus_s |
3-T Model for salicided N+ diffusion resistor |
pplus_s |
3-T Model for salicided P+ diffusion resistor |
nwell |
3-T Model for Nwell resistor |
rm1 |
2-T Model for metal 1 resistor |
rm2 |
2-T Model for metal 2 resistor |
rm3 |
2-T Model for metal 3 resistor |
tm6k |
2-T Model for top metal 6k resistor |
tm9k |
2-T Model for top metal 9k resistor |
tm30k |
2-T Model for top metal 30k resistor |
efuse |
Model for 5V(6V) efuse |
4.1 Model Features¶
The NGSPICE and XYCE resistor models include:
Multiple lumped element R-C sub-circuit.
Separate body and end resistance temperature coefficients.
Parasitic capacitance between the resistor and substrate is accounted for.
Device temperature difference with respect to circuit temperature (dtemp).
Resistors connected in series cannot represented using instance parameter “s”
4.2 Model Limitations and Restrictions¶
Known limitations of the NGSPICE and XYCE resistor models:
To be added
4.3 Model Syntax for Resistors¶
Input Parameters:
w: resistor design width (m)
l: resistor design length (m)
s: Number of resistors in series
General Syntax:
Xxx IN OUT SUB resistor_model_name w= l= s=
Examples:
XR1 1 2 3 nwell w=10um l=10um s=2
4.4 How to Use the Models¶
4.4.1 For NGSPICE Users¶
To be added
4.4.2 For XYCE Users¶
To be added