Question
Download Solution PDFA BJT operates as a switch
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe applications of BJT and the biasing conditions are shown below:
|
Region |
JE |
JC |
Application |
|
Forward active |
FB |
RB |
Amplifier |
|
Cutoff |
RB |
RB |
OFF switch |
|
Saturation |
FB |
FB |
ON switch |
|
Reverse active |
RB |
FB |
Attenuator |
- BJT is never operated in the reverse active region
- The main application of the BJT is as an amplifier, and this is possible under small-signal conditions.
- The characteristics of IC – Vbe is as shown below:
- Current variations are linear in this region.
- Non-linear behavior becomes linear in that small region.
- DC operating point is needed so that we can apply the signal at that point to get the amplified signal.
- The remaining applications of transistor i.e. ON & OFF switch are possible under the large-signal conditions.
Last updated on Jul 2, 2025
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