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Design Notes

Bipolar Device Model Simulation

This example shows various measurements for the bipolar device used to extract various parameters for the Gummel Poon BJT and similar models. The measurements presented here and the corresponding parameters that can be extracted from them are listed below.

Forward_Gummel Schematic

Extract: IS, BF, NF, ISE, NE, and IKF.

Used interactively to modify: RE, RC, RB, and VAR.

Reverse_Gummel Schematic

Extract: BR, ISC, NR, IKR, and NC.

Used interactively to modify: RE, RC, RB, and VAF.

Forward Early (Fearly) Schematic

Extract: VAF.

Reverse Early (Rearly) Schematic

Extract: VAR.

Fearly Family (IV Curves) Schematic

Extract VAF as a function of Vbe, Vce, and Ic.

RC Flyback Schematic

Extract: RC

RE Flyback Schematic

Extract: RE

Forward Beta Output Equations

Extract: BETA.

Reverse Beta Output Equations

Extract RBETA (not in most models).

Schematic - Fearly

Schematic - Rearly

Schematic - Forward_Gummel

Schematic - IV_Curve_Fearly_Family