Consider a uniformly doped npn BJT at T= 300 K with the following parameters: NE = 108 cm-3 NB 5x106 cm- Nc = 106 cm ME 150 cm/Vs Hc 400 cm/Vs = Tc = 20 x 10-6 s TE=0.5 x 10-6 s XE = WE =0.8 pm HB = 900 cm/Vs TB = 10-6 S XB = WB = 0.5 m Calculate a) the base transport factor B (keep at least 2 significant digits past the last "9") b) the emitter injection efficiency y (keep at least 2 significant digits past the last "9") c) the common emitter current gain For VBE = 0.6 V and VCB = 5 V, calculate (use A = 5 x 10-4 cm) d) the collector current e) the emitter current f) the base current