Hello folks,
Im watching currently a video lecture series on analog integrated circuits from the university of Berkeley and in video 4 the topic is inspection analysis.
At around 1:14 of ( http://www.infocobuild.com/educatio...onics/EE140-Fall2013-Berkeley/lecture-04.html )the lecturer starts to derive the current through the circuit and comes to the conclusion that Icc is determined by -UBE-UEE/REE. This is what I dont understand because in theory at this point we should also take the transistor into account (and do the load plot etc). I mean in his analysis by choosing for instance REE -> 0 the current could go to infinity which it wont of course due to the transistor so it is obviously wrong, so I guess it is a good approximation and why is it for this example and when can I do this so easily?
Thank you very much in advance for the help!
Im watching currently a video lecture series on analog integrated circuits from the university of Berkeley and in video 4 the topic is inspection analysis.
At around 1:14 of ( http://www.infocobuild.com/educatio...onics/EE140-Fall2013-Berkeley/lecture-04.html )the lecturer starts to derive the current through the circuit and comes to the conclusion that Icc is determined by -UBE-UEE/REE. This is what I dont understand because in theory at this point we should also take the transistor into account (and do the load plot etc). I mean in his analysis by choosing for instance REE -> 0 the current could go to infinity which it wont of course due to the transistor so it is obviously wrong, so I guess it is a good approximation and why is it for this example and when can I do this so easily?
Thank you very much in advance for the help!