we can get only voltage amplification from CB configuration
.And we can get voltage and current amplification from CE
configuration. so we get high voltage from both of CE & CB
configuration.
high voltage gain is obtained from CB configuration only.
because the input impedance is low and out impedance is
high in CB configuration. so we get maximum voltage gain in
CB. whereas for CE the input impedance is moderate and
output impedance is moderate. so we get maximum power gain
from CE. and CC voltage gain is approximately one. so this
will give maximum current gain. CC is used for impedance
matching. CC is also known as emitter follower. because of
its unity gain.
cb will have max voltate gain.
ce will have max power gain.
cc will have max current gain.
guys am not contradicting any answer stated above, i accept it totally..
a doubt..
is it not the resistors connected at either ends decide the v gain in cb case..
i mean the ip n op voltages -- wont they b the same if the same values of resistors r used either side( or would the transistor go off to cut off ?? if same values r connected on either sides)
i am agree with answer 5
highest voltage gain can be obtained by CB
because its input impedence is low and output impedence is
high so it can give highest voltage gain
no doubt the maximum voltage gain will be obtained from CB
configuration only. for the answer 6: we dont connect any
resistors on either side of input and output. by its
connection we get input and output resistances. we know the
doping concentrations of emitter, base and collector.
depending upon the configuration we get input and output
impedences. nothing else.
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