First I would like to thank everybody here for providing the help. This great resource allows me to understand things beyond what my textbook only offers.
I have the question below:
Here is the figure they are referring to in the question:
(Source of images: "Microelectronic Circuits" book by Sedra/Smith, 7th edition, chapter 9)
HERE YOU FORGET TO INSERT AN IMPORTANT ASSUMPTION
AND IT EXPLAINS WHY YOU ARE MISSING 0.4 V taken from sedra-smith
So using the small signal analysis model, which am not going make you bored from it, I was able to find the value to Rc = 5k ohms which totally agrees with the text book's answer. Now my struggle is to find the maximum Vcm.
Here is my analysis
But my book says that:
Can somebody please tell me how that came about?? Am really confused! Thank you for your help in advance.
Here is an LTspice simulation of the problem. Please let me know if my model is correct or not because am a beginner with LTSpice. You can see from the simulation results that change in collector voltages and currents don't happen till around vb=2.9V