Question
Download Solution PDFIn a bipolar transistor, alpha is the ratio of:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFBipolar Junction Transistor (BJT)
BJT is a current-controlled device.
BJT is a three-terminal device i.e. base, collector, and emitter.
The conduction in BJT is due to the minority as well as the majority charge carrier.
Current ratios in BJT
1.) Common base current gain
It is the ratio of collector current to emitter current.
It is denoted by α
\(α={I_C\over I_E}\)
2.) Common emitter current gain
It is the ratio of collector current to base current.
It is denoted by β
\(β={I_C\over I_B}\)
3.) Common collector current gain
It is the ratio of emitter current to base current.
It is denoted by γ
\(γ={I_E\over I_B}\)
Also, γ = α + β
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