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Emitter Efficiency Formula

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Emitter Efficiency is defined as the ratio of the electron current in the emitter, to the sum of the electron and hole current diffusing across the base-emitter junction. Check FAQs

η E = \frac{I nE}{I nE + I h}

η_E - Emitter Efficiency?I_nE - Electron Diffusion Current?I_h - Hole Diffusion Current?

Emitter Efficiency Example

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Here is how the Emitter Efficiency equation looks like with Values.

Here is how the Emitter Efficiency equation looks like with Units.

Here is how the Emitter Efficiency equation looks like.

0.4902 = \frac{25}{25 + 26}

0.4902 = \frac{25mA}{25mA + 26mA}

0.4902 = \frac{25}{25 + 26}

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Emitter Efficiency Solution

Follow our step by step solution on how to calculate Emitter Efficiency?

FIRST Step Consider the formula

η E = \frac{I nE}{I nE + I h}

Next Step Substitute values of Variables

∴

η E = \frac{25mA}{25mA + 26mA}

Next Step Convert Units

∴

η E = \frac{0.025A}{0.025A + 0.026A}

Next Step Prepare to Evaluate

∴

η E = \frac{0.025}{0.025 + 0.026}

Next Step Evaluate

∴

η E = 0.490196078431373

LAST Step Rounding Answer

∴

η E = 0.4902

Emitter Efficiency Formula Elements

Variables

Emitter Efficiency

Emitter Efficiency is defined as the ratio of the electron current in the emitter, to the sum of the electron and hole current diffusing across the base-emitter junction.

Symbol: η_E

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Emitter Efficiency

Electron Diffusion Current

Electron Diffusion Current is a current in a semiconductor caused by the diffusion of charge carriers like electrons.

Symbol: I_nE

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Electron Diffusion Current

Hole Diffusion Current

Hole Diffusion Current is the current that flows in a semiconductor and it is caused by the diffusion of charge carriers like holes.

Symbol: I_h

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Hole Diffusion Current

Other formulas in Transistor Operating Parameters category

Go Emitter Current

I e = I b + I c

Go Current Amplification Factor

α = \frac{I c}{I e}

Go Current Amplification Factor using Base Transport Factor

α = \frac{β}{β + 1}

Go Collector Current using Base Transport Factor

I c = β \cdot I b

How to Evaluate Emitter Efficiency?

Emitter Efficiency evaluator uses Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current) to evaluate the Emitter Efficiency, The emitter efficiency is the ratio of carriers injected into the base from the emitter (forward minority carrier injection) to total carriers injected from the base into the emitter (reverse minority carrier injection) plus forward injection. Emitter Efficiency is denoted by η_E symbol.

How to evaluate Emitter Efficiency using this online evaluator? To use this online evaluator for Emitter Efficiency, enter Electron Diffusion Current (I_nE) & Hole Diffusion Current (I_h) and hit the calculate button.

FAQs on Emitter Efficiency

What is the formula to find Emitter Efficiency?

The formula of Emitter Efficiency is expressed as Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current). Here is an example- 0.490196 = 0.025/(0.025+0.026).

How to calculate Emitter Efficiency?

With Electron Diffusion Current (I_nE) & Hole Diffusion Current (I_h) we can find Emitter Efficiency using the formula - Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current).

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Emitter Efficiency Formula

Emitter Efficiency Example

Emitter Efficiency Solution

Emitter Efficiency Formula Elements

Other formulas in Transistor Operating Parameters category

How to Evaluate Emitter Efficiency?

FAQs on Emitter Efficiency

Variable Name