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