Comparison of Transistor Configurations


TRANSISTOR CONFIGURATION
COMMON BASE
COMMON EMITTER
COMMON COLLECTOR




VOLTAGE GAIN
High
Medium
Low(Nearly Unity)




CURRENT GAIN
Low (Nearly Unity)
Medium
High




POWER GAIN
Low
High
Medium




INPUT/OUTPUT PHASE RELATION
0°
180°
0°




INPUT IMPEDANCE
Low
Medium
High




OUTPUT IMPEDANCE
High
Medium
Low




APPLICATIONS
Pre-amplifiers
VHF and UHF Amplifiers
Current Buffers
Impedance Matching
LF and RF Amplifiers
Electronic Switches
Oscillators

Impedance Matching
Voltage Buffers
Driver Amplifiers