EECS 384 Old Exam Final

# Note that the vertical scale is 104 cm3 per tick

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Unformatted text preview: ow. The depletion regions are hashed out with diagonal lines, and the depletion edges under bias are shown with vertical black lines. Assume NE = 1.1 x 1016 cm ­3, NB = 0.55 x 1016 cm ­3, NC = 0.55 x 1016 cm ­3, and assume room temperature operation. #20 (1 point) Calculate the equilibrium minority carrier concentrations in the emitter, base, and collector, and label them pn,E, np, and pn,C, respectively. For this problem, assume silicon has an intrinsic carrier concentration ni = 1.5 x 1010 cm ­3. #21 (3 points) Draw with a dashed line below the equilibrium minority carrier concentrations in the charge ­neutral regions of the emitter, base, and collector, and label them as pn,E, np, and pn,C, respectively. Note that the vertical scale is 104 cm ­3 per tick. Emitter (104 cm ­3) Base (104 cm ­3) Collector  ­xn,E (µm)  ­1 0 0...
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