si liao lah............i can't concentrate~!!!! exams in 1 week's time and i cant concentrate~!!!!
im stuck~!!!!! if the open loop gain is used to calculate the output voltage even when there is a feedback loop, then what in the world is closed loop gain used for?!

actually, in unity gain buffer Ao is still used cos there are no extra resistors connected in the feedback loop. but when there are extra resistors added to the feedback loop, then the effective gain is the closed loop gain..............i think.............

hmmmmmmm........cool.....i can finally type without looking at the keyboard.............alrite~! so studying does weird things to u....................but typing without looking at the keyboard does help me pass the exams~!!!!!!!!

die lah....................