Question
Download Solution PDFWhich transistor configuration amplifier’s current gain is lowest?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe DC current gain of a common collector is given by the ratio of emitter current to the base current, i.e.
The DC current gain for a common emitter configuration is defined as:
The DC current gain for a common base configuration is defined as:
IE = Emitter Current
IB = Base Current
IC = Collector Current
The comparison of the various configuration of Amplifiers is as shown:
|
Parameter |
Common-Base |
Common-Emitter |
Common-Collector |
CE (Darlington) |
|
Input Current |
IE |
IB |
IB |
IB |
|
Output Current |
IC |
IC |
IE |
IC |
|
Current Gain |
|
|
|
|
|
Voltage Gain |
Medium |
Medium |
Less Than 1 |
Medium |
Hence the correct increasing order of their Current Gain is:
CB < CE < CC < Darlington pair
Last updated on Jun 26, 2025
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