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- Forward bias the base-emitter junction and reverse bias the base-collector junction
- Forward bias the collector-base junction and reverse bias the emitter-base junciton
- Apply a positive voltage on the n-type material and a negative voltage on the p-type material
- Apply a large voltage on the base
Answer (Detailed Solution Below)
Option 1 : Forward bias the base-emitter junction and reverse bias the base-collector junction
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Detailed Solution
Download Solution PDFBJT Amplifier:
- Transistors biasing is done to keep stable DC operating conditions needed for its functioning as an amplifier.
- A properly biased transistor must have its Q-point (DC operating parameters like ICand VCE) at the center of saturation mode and cut-off mode i.e. active mode.
- In the active mode of transistor operation, thebase-emitter junctionisforward biasedand thebase-collector junctionisreverse biased.
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Different modes of BJT operations are:
Mode | Emitter-base Junction | Collector-Base Junction |
Cut off | Reverse | Reverse |
Active | Forward | Reverse |
Reverse Active | Reverse | Forward |
Saturation | Forward | Forward |
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Q1.Which of the following statements is correct regarding the doping levels of the emitter, base and collector regions in abipolar junction transistor (BJT)?
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