Simulation Questions:

[harry bissell]

Can someone explain to me what the transistors that are drawn with
multiple emitters (on data sheets) actually are???  For example I'm
looking at the LM334 constant current source IC from National Semi.
There are NPN and PNP drawn like this...

I'm playing with temperature sweep analysis and want to see if this
behaves like reality...

Also... does anyone know how to model tempco resistors ??? My program
allows ohms/deg C.   Just make this 3300 ppm ??

How about zener models... Data sheets suggest that a zero tempco can be
had at 4-6 volts for most devices... but the simple models don't seem to
work like this... I expect the lower voltages to have a opposite tempco
from the high voltage devices...
they dont !

:^) Harry (thanks in advance gurus....)  Bissell