1. The early effect in a bipolar junction transistor is caused
by
(a) Fast
turn ON
(b) Fast turn OFF
(c) Large collector –
base reverse bias
(d) Large
emitter – base forward bias
2. In the cascade amplifier shown in figure, if the common
emitter stage (Q1) has a transconductance gm1, and
the common base
stage (Q2) has a transconductance gm2,
then the overall
transconductance , g = (io/Vi) of
the cascade amplifier
is
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