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In a uniformly doped BJT, assume that NE, NB and NC are the emitter, base and collector doping in atoms / cm^3 respectively

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In a uniformly doped BJT, assume that NE, NB and NC are the emitter, base and collector doping in atoms / cm3 respectively. If the emitter injection efficiency of the BJT is close to unity which one of the following is true? 

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 Correct Option (b) NE >> NB AND  NB > NC

Explanation :

Emitter injection efficiency (γ) can be written in term of emitter,

base doping concentrations.

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