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1. [BJT Forward-Active Current] For a npn BJT with cross-section as below: (a) [20%] Assuming VBE 0.8 V, calculate the base neutral region width (WB), and confirm whether WB< Ln. (Hint: consider the depletion widths at the base/emitter and base/collector junctions.) (b) [3090] Assuming VBE-0.8 V. calculate lc. IB and IE. Note: use the appended graphs for Ln and Dn BE 50 ?m 50 ?m Emitter Il Base 0.4 um Collector Active base region Nd(Emitter) 1 x 1020 1/cm Na(Base) 4 x 1017 1/cm3 Nd(Collector) = 1 × 1018 1/cm3 T=300K, Ni=1E10cm-3
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T=300K, Ni=1E10cm-3 1. [BJT Forward-Active Current] For a npn BJT with cross-section as below: (a) [20%]...
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