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Consider an NPN transistor with WE = 0.5 11m. We = 0.2 11m. We= 2 11m. Da = 10 cm2/s.

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(a) Rnd the peak ßF from Fig. 8-27. V BIl (V)

(b) Estimate the base doping concentration Na.

(c) Find the VeE at which the pea k minority carrier concentration in the base is about to Ne = 1017 cm-3.

(d) Find the base transit time

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