Capacitor in NPN Transistor: Exploring Unknown Theory

AI Thread Summary
The discussion centers on the role of a capacitor placed between the base and collector of an NPN transistor. Participants speculate that this configuration may serve as a feedback mechanism or a high-frequency filter. There is a call for clarification, emphasizing the need for a complete schematic to better understand the capacitor's function. One user notes that in audio amplification circuits, such capacitors often act as coupling components, providing local negative feedback and functioning as high-pass filters. Overall, the conversation highlights the complexity and under-explored nature of this topic in transistor theory.
mearom
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What's about this? Where a capacitor is between base and collector (NPN). I have formulated some of my own theories (it seems like this is totally unknown of on the internet, and the books I've looked at don't explain it), but I have thought of flaws to all my theories. Can anyone please explain? Thankyou
 
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I think I thought of it

IS it just for feedback, acting as a really high freq filter?

Sometimes you just have to ask to know
 
Your post tells us basically nothing. You'd need to show us a complete schematic for us to be able to tell you why the capacitor is there.

- Warren
 
what is cc in vas?
 
In the voltage amplification stage of a three stage audio amp there is often a coupling capacitor connected to base and collector/ input and output. I think this is as a high pass filter so as to provide local negative feedback
 

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