Question
Download Solution PDFThe output impedance of a BJT under common-collector configuration is
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.
Important Differences between different transistor configuration is as shown:
|
|
Common Base |
Common Emitter |
Common Collector |
|
Input Current |
IE |
IB |
IB |
|
Output Current |
IC |
IC |
IE |
|
Current Gain |
\({α _{dc}} = \frac{{{I_C}}}{{{I_E}}}\) |
\({\beta _{dc}} = \frac{{{I_C}}}{{{I_B}}}\) |
\(\gamma = \frac{{{I_E}}}{{{I_B}}} \) \({1 + {\beta _{dc}}}\) |
|
Voltage Gain |
Medium |
Medium |
Less Than 1 |
Last updated on Jun 23, 2025
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