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What is the biasing condition of junctions in bipolar junction transistor to work as an amplifier?

What is the biasing condition of junctions in bipolar junction transistor to work as an amplifier? Correct Answer Forward biased base to emitter junction and reverse biased base to collector junction

BJT 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 IC and VCE) at the center of saturation mode and cut-off mode i.e. active mode.
  • In the active mode of transistor operation, the base-emitter junction is forward biased and the base-collector junction is reverse 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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