Comparison of Transistor Characteristics in three Configurations

Comparison of Transistor Characteristics in three Configurations :-

Transistor in three Configurations Common Emitter, Common Base and Common Collector can be compared in terms of Input and output impedance’s ,voltage and current gains and some other parameters. Those are tabulated as follows

characteristic	Common Base (CB)	Common Emitter (CE)	Common Collector (CC)
Input Impedance/Resistance ( $Z_{i}$ )	low ( $\approx 100\Omega$ )	Medium ( $750\Omega$ )	Very High ( $750K\Omega$ )
Output Impedance ( $Z_{o}$ )	Very High ( $450K\Omega$ )	Moderate ( $45K\Omega$ )	low ( $25\Omega$ )
Current gain ( $A_{I}$ )	Unity	High	High
Voltage gain ( $A_{v}$ )	about $150$ High ( $\approx 131$ )	about $500$ High	less than $1$
Phase shift b/w i/p and o/p	$0^{o}/360^{o}$	$180^{o}$	$0^{o}/360^{o}$
Applications	High Frequency Circuits	For Audio Circuits	For impedance matching