26-09-2013, 03:22 PM
To verify the characteristics of CC Amplifier
INTRODUCTION
It is called the common-collector configuration because (ignoring the power supply battery) both
the signal source and the load share the collector lead as a common connection point
Common collector: Input is applied to base and collector. Output is from emitter-collector
circuit.It should be apparent that the load resistor in the common-collector amplifier circuit
receives both the base and collector currents, being placed in series with the emitter. Since the
emitter lead of a transistor is the one handling the most current (the sum of base and collector
currents, since base and collector currents always mesh together to form the emitter current), it
would be reasonable to presume that this amplifier will have a very large current gain. This
presumption is indeed correct: the current gain for a common-collector amplifier is quite large,
larger than any other transistor amplifier configuration. However, this is not necessarily what
sets it apart from other amplifier designs.