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

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Author: Lakshmi Prasanna

Completed M.Tech in Digital Electronics and Communication Systems and currently working as a faculty.