Common-base current gain Calculator

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✖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.ⓘ Common emitter current gain [β]

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✖Common-base current gain. α is related to β common-emitter current gain of a transistor and used for calculations.ⓘ Common-base current gain [α]

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Credits

Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 500+ more calculators!

Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

Urvi Rathod has verified this Calculator and 1000+ more calculators!

Common-base current gain Solution

STEP 0: Pre-Calculation Summary

Formula Used

common_base_current_gain = Common emitter current gain/(Common emitter current gain+1)
α = β/(β+1)
This formula uses 1 Variables

Variables Used

Common emitter current gain- 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.

STEP 1: Convert Input(s) to Base Unit

Common emitter current gain: 55 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

α = β/(β+1) --> 55/(55+1)

Evaluating ... ...

α = 0.982142857142857

STEP 3: Convert Result to Output's Unit

0.982142857142857 --> No Conversion Required

FINAL ANSWER

0.982142857142857 <-- Common-base current gain.

(Calculation completed in 00.016 seconds)

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Common-base current gain

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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

Emitter current when constant of the transistor is given

emitter_current = (Saturation current/Common-base current gain.)*e^(Voltage across the base–emitter junction/Thermal voltage) Go

Collector Current of BJT

collector_current = Saturation current*e^(Voltage across the base–emitter junction/Thermal voltage) Go

Emitter current when collector current and current gain is given

emitter_current = ((Common emitter current gain+1)/Common emitter current gain)*Collector current Go

Common-base current gain

common_base_current_gain = Common emitter current gain/(Common emitter current gain+1) Go

Common-emitter current gain in terms of common-base current gain

common_emitter_current_gain = Common-base current gain./(1-Common-base current gain.) Go

Base Current 1 of BJT

base_current_1 = Collector current/Common emitter current gain Go

Emitter Current of BJT

emitter_current = Collector current+Base Current Go

Total base current

base_current = Base current 1+Base Current 2 Go

Common-base current gain Formula

common_base_current_gain = Common emitter current gain/(Common emitter current gain+1)
α = β/(β+1)

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 -> 0.982143 = 55/(55+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.

How many ways are there to calculate Common-base current gain.?

In this formula, Common-base current gain. uses Common emitter current gain. We can use 10 other way(s) to calculate the same, which is/are as follows -

collector_current = Saturation current*e^(Voltage across the base–emitter junction/Thermal voltage)
base_current_1 = Collector current/Common emitter current gain
base_current = Base current 1+Base Current 2
base_current_2 = (Saturation current/Common emitter current gain)*(e^(Voltage across the base–emitter junction/Thermal voltage))
emitter_current = Collector current+Base Current
emitter_current = ((Common emitter current gain+1)/Common emitter current gain)*Saturation current*e^(Voltage across the base–emitter junction/Thermal voltage)
emitter_current = ((Common emitter current gain+1)/Common emitter current gain)*Collector current
common_base_current_gain = Common emitter current gain/(Common emitter current gain+1)
emitter_current = (Saturation current/Common-base current gain.)*e^(Voltage across the base–emitter junction/Thermal voltage)
common_emitter_current_gain = Common-base current gain./(1-Common-base current gain.)

Where is the Common-base current gain calculator used?

Among many, Common-base current gain calculator is widely used in real life applications like {FormulaUses}. Here are few more real life examples -
{FormulaExamplesList}

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