Payal Priya
Birsa Institute of Technology (BIT), Sindri
Payal Priya has created this Calculator and 300+ more calculators!
Urvi Rathod
Vishwakarma Government Engineering College (VGEC), Ahmedabad
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8 Other formulas that you can solve using the same Inputs

Base current when saturation current in DC is given
Base Current=(Saturation current/Common emitter current gain)*e^(Voltage across the base–emitter junction/Thermal voltage)+Saturation Vapour Pressure at Water Surface*e^(Voltage across base-collector junction/Thermal voltage) GO
Emitter current when common-emitter current gain is given
Emitter current=((Common emitter current gain+1)/Common emitter current gain)*Saturation current*e^(Voltage across the base–emitter junction/Thermal voltage) GO
Base Current 2 of BJT
Base Current 2=(Saturation current/Common emitter current gain)*(e^(Voltage across the base–emitter junction/Thermal voltage)) GO
Base current of PNP transistor when saturation current is given
Base Current=(Saturation current/Common emitter current gain)*e^(Voltage across emitter-base junction/Thermal voltage) GO
Emitter current when saturation current is given
Emitter current=((Common emitter current gain+1)/Common emitter current gain)*Collector current GO
Base Current 1 of BJT
Base current 1=Collector current/Common emitter current gain GO
Base current of PNP transistor when collector current is given
Base Current=Collector current/Common emitter current gain GO
Base current of PNP transistor when emitter current is given
Base Current=Emitter current/Common emitter current gain GO

Common-base current gain Formula

Common-base current gain.=Common emitter current gain/(Common emitter current gain+1)
α=β /(β +1)
More formulas
Collector Current of BJT GO
Base Current 1 of BJT GO
Base Current 2 of BJT GO
Total base current GO
Emitter Current GO
Emitter current when common-emitter current gain is given GO
Emitter current when saturation current is given GO
Collector current when emitter current is given GO
Emitter current when constant of the transistor is given GO
Common-emitter current gain in terms of common-base current gain GO
Concentration of electrons injected from emitter to base GO
Collector current when saturation current of DC is given GO

On what factors constant of a transistor depends?

Small changes in α correspond to very large changes in β. This mathematical observation manifests itself physically, with the result that transistors of the same type may have widely different values of β. For reasons that will become apparent later, α is called the common-base current gain.

How to Calculate Common-base current gain?

Common-base current gain calculator uses Common-base current gain.=Common emitter current gain/(Common emitter current gain+1) to calculate the Common-base current gain., The common-base current gain of a transistor for a particular transistor that is less than or close to the unity. . For instance, if β =100, then α ≅0.99. Common-base current gain. and is denoted by α symbol.

How to calculate Common-base current gain using this online calculator? To use this online calculator for Common-base current gain, enter Common emitter current gain (β ) and hit the calculate button. Here is how the Common-base current gain calculation can be explained with given input values -> 0.980392 = 50/(50+1).

FAQ

What is Common-base current gain?
The common-base current gain of a transistor for a particular transistor that is less than or close to the unity. . For instance, if β =100, then α ≅0.99 and is represented as α=β /(β +1) or Common-base current gain.=Common emitter current gain/(Common emitter current gain+1). Common emitter current gain is highly influenced by two factors: the width of the base region, W, and the relative dopings of the base region and the emitter region.
How to calculate Common-base current gain?
The common-base current gain of a transistor for a particular transistor that is less than or close to the unity. . For instance, if β =100, then α ≅0.99 is calculated using Common-base current gain.=Common emitter current gain/(Common emitter current gain+1). To calculate Common-base current gain, you need Common emitter current gain (β ). With our tool, you need to enter the respective value for Common emitter current gain and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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