EE 438 questions center around achieving gain, arranging transistors, resistors, and capacitors so that a small signal (Vsig) can become a large one (Vout). right now i'm no friend to the small signal. let's put it that way. my path is strewn with murdered small signals.
Vsig is the EKG blip, the caller's voice, the link to the landing gear; you can't be careless about Vsig. somebody has to safeguard Vsig from its enemies.