This topic inspires a lot of religiosity and I'm not going to argue
with any of you about it (again), only to say that I was taught
another way and that offers a much more useful intuition of the
goings-on.
@all
I just want to remind not to take the posts as personal offense.
Klaus
When I hear the word "misconception in textbooks" there is one thing which comes immediately in my mind:
1.) I guess that in app. 50% of all textbooks the working principle of bipolar transistor is explained - no sorry: not "explained" - it is just claimed that the BJT would be a current-controlled device.
And the only "proofe" of this wrong statenment is the relation Ic=beta*Ib.
2.) At the same time, all the examples which are presented with the aim to show how a BJT-based amplifier stage is designed is based on a voltage-controlled model.
And - most surprisingly - the authors seem not to realize this contradiction.
(I am aware that this subject was discussed also in this forum already - in some cases with many emotions. It seems that some people who have learned that the BJT would be current-controlled are unable to accept a better - more correct - description. And this - in spite of the fact that there are many proofes for voltage-control)
You said that BJT can be controlled by voltage, but I can still argue that it's the voltage that dictate the current that goes to the base.
BTW, I'm not of those that are unable to accept a better explanation. I'm always open to better explanations
The scientist starts crying. He knows it will take him an infinite amount of time to reach the beautiful woman...
You said that BJT can be controlled by voltage, but I can still argue that it's the voltage that dictate the current that goes to the base.
BTW, I'm not of those that are unable to accept a better explanation. I'm always open to better explanations
I'll use this as an example to re-iterate my point that a single model doesn't need to explain everything for everyone.
A BJT can be usefully modeled as voltage controlled -> Good for some things
A BJT can be usefully modeled as current controlled -> Good for other things.
The wise and educated understand both (and more) and understand when each model is useful.
single model doesn't need to explain everything for everyone...
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