Question
Download Solution PDFWhat is the value of the DC current gain in common collector configuration?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- Common collector configuration, also known as emitter follower provides high input impedance and low output impedance. So they are used for the purpose of impedance matching.
- In common collector configuration, the collector terminal is common to both input and output terminals.
The DC current gain is therefore given by the ratio of emitter current to the base current, i.e.
IE = Emitter Current
IB = Base Current
Also, IE = IB + IC
DC current gain will be:
The DC current gain for a common emitter configuration is defined as:
Equation (1) now becomes:
Important Differences between different transistor configuration is as shown:
|
Parameter |
Common-Base |
Common-Emitter |
Common-Collector |
|
Input Current |
IE |
IB |
IB |
|
Output Current |
IC |
IC |
IE |
|
Current Gain |
|
|
|
|
Voltage Gain |
Medium |
Medium |
Less Than 1 |
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