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4.3 Model Library 471<br />

parameter name<br />

default value<br />

BF ideal maximum forward current gain<br />

BR ideal maximum reverse current gain<br />

IKF (IK) ∞ A corner current for forward-beta high-current<br />

roll-off<br />

IKR ∞ A corner current for reverse-beta high-current<br />

roll-off<br />

IS ⨯ A transport saturation current<br />

ISC (C4) A base-collector leakage saturation current<br />

ISE (C2) A base-emitter leakage saturation current<br />

ISS A substrate junction saturation current<br />

NC base-collector leakage emission coefficient<br />

NE base-emitter leakage emission coefficient<br />

NF forward current emission coefficient<br />

NK high-current roll-off coefficient<br />

NR reverse current emission coefficient<br />

NS (NSS) substrate junction emission coefficient<br />

VAF (VA) ∞ V forward early voltage<br />

VAR (VB, VBAR) ∞ V reverse early voltage<br />

DC related model parameters.<br />

parameter name<br />

default value<br />

IRB ∞ A current at which RB falls halfway to its<br />

minimum value<br />

RB zero-bias base ohmic resistance<br />

RBM RB minimum base ohmic resistance<br />

RC collector ohmic resistance<br />

RE emitter ohmic resistance<br />

Parasitic resistance related model parameters.

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