I'm just getting into electronics, and i'm looking for efficient ways of viewing circuits to best see their purpose.

I'm having trouble finding detailed explanations of how collector feedback for BJTs actually work. There are lots of explanations for this kind of set up, where the feedback current IS the base current.

http://www.globalspec.com/RefArticleImages/EC37F9299171572362E77C38033C0B25_89.jpg

But I cant find any detailed explanations of the more practical circuit where an external voltage is also applied to the base through an impedance.

Are there any good ways of viewing the circuit to get a better feel for what kind of voltage is at the collector, and what kind of impedance the external base source feels, without having to perform a mathematical analysis. Any rule of thumb formulas would be very useful. My head just goes around in circles with the feedback every time I think about it.

Also, this is my first post, so hello to you all. I hope to contribute once I know a bit more worth contributing

Matt