Hi all, I made a simple LTSPICE simulation to try and understand how BJTs
work.

Screenshot: http://postimage.org/image/1dk9mvetg/full/

On the plot (from left to right):

* Power dissipation of the BJT
* Vdrop across the resistor
* Vdrop across the BJT
* Current through the resistor
* Impedance of the BJT

Specifically, I was trying to see how the BJT behaves (it's impedance),
under various collector voltages when 5mA flows through its base (hFE is
100). I don't understand the impedance spike at the beginning of the cyan
line in the region of x=3D0 to x=3D0.3ish Volts. Also, why is the graph sho=
wing
negative resistance?
--=20
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