Darlingtons

These are subcircuits using a standard transistor model. A Darlington model is shown as follows:

*
*Zetex FZT605 Spice Model v1.0 Last revision 27/04/05
*
.SUBCKT FZT605 1 2 3
* C B E
Q1 1 2 4 SUB605
Q2 1 4 3 SUB605 3.46
*
.MODEL SUB605 NPN IS=4.8E-14 BF=170 etc.
.ENDS FZT605
*
*$

Note:

Because Diodes' Zetex Darlingtons are monolithic, the two transistors used are identical in all respects other than size. (The number at the end of the Q2 line multiplies the size of the SUB605 transistor by 3.46 - the ratio of the areas of the input and output transistors for this device).

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