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BJT output I-V characteristic

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amir.razzaqi:

--- Quote from: T3sl4co1l on October 02, 2023, 03:13:46 pm ---I don't see in your screenshots where Ib increased from increased Vcc.

Tim

--- End quote ---

Sorry, it was a typo. I mean "decrease"

Sredni:
To add confusion, let me say that in certain conditions you can actually see base current change with VCE.
If you do not pull the base toward a fixed voltage, VBE can be seen changing appreciably with VCE. You need a very big resistance in base, so some might argue that VBE actually changes when IB=0, but if I can measure VBE with an ordinary voltmeter

https://www.eevblog.com/forum/testgear/what-is-the-internal-resistance-of-the-uni-t-ut139c-%28on-the-mv-range%29/
(see page 2. the last pictures)

...then we must conclude that a base current proportional to the base-emitter voltage is actually flowing due to the applied VCE.

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