Question
Download Solution PDFA transistor is said to be useful to be configured as an amplifier when its β is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFor the current gain of the common emitter amplifier to be large the value of β needs to be very high.
In such cases, we can say that it works as a current amplifier, i.e. a small base current controls a larger (typically 100 times) current in the collector.
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 |
Last updated on Jul 2, 2025
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