Why a to minimize recombination in the emitterbase

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Unformatted text preview: ollector voltage increases is known as the Early effect and is due to what physics? a) Quantum mechanical tunneling. b) Impact ionization. c) SRH recombination d) The decreasing width of the quasi ­neutral base. e) Generation in the space charge region. 5) To achieve a high common emitter current gain, ! DC , the base of an NPN silicon BJT must be doped much less heavily than the emitter. Why? a) To minimize recombination in the emitter ­base junction. b) The minimize recombination in the base. c) To minimize current crowding in the base. d) To put the base in high ­level injec...
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This note was uploaded on 01/15/2014 for the course ECE 606 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

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