(Solved): Problem 2: (a) Plot space charge diagram, electric field and energy band diagram of p+/n/p BJT a ...

Problem 2: (a) Plot space charge diagram, electric field and energy band diagram of p+/n/p BJT as a function of x for active mode of operation. (6 pts) ? E B E I (b) What will be the dominant mechanism for current conduction in emitter base junction? What will be the dominant mechanism for current conduction in base collector junction? Briefly explain. (3 pts) (c) The base width of the BJT is decreased to be very thin, so that it would be ignorable compared to the width of emitter and collector regions. Plot the new space charge diagram, electric field and energy band diagram of p+/n/p BJT for active mode of operation. (6 pts) E B C E Energy Band X (d) How will decreasing base width effect common emitter current gain? What will be the limit if base width approaches to zero? (2 pts) Let's say we keep the base at a reasonable width shorter than diffusion length (LB). Please circle the right answers: (e) Increasing NË (emitter doping) (A) increases, (B) decreases, or (C) has no effect on y? (1 pts) (f) Increasing NE (A) increases, (B) decreases, or (C) has no effect on ar? (1 pts) (g) Increasing collector width (A) increases, (B) decreases, or (C) has no effect on ³Dc? (1 pts) (h) Assume that you want a current gain of 100. Would the dopant concentration in the base region compared to the dopant concentration in emitter be: (1pts) A. A factor of 100 greater, B. A factor of 10 greater, C. About equal to, D. A factor of 10 smaller, E. A factor of 100 smaller?