Emitter Efficiency Calculator

✖Electron Diffusion Current is a current in a semiconductor caused by the diffusion of charge carriers like electrons.ⓘ Electron Diffusion Current [I_nE]			+10% -10%
✖Hole Diffusion Current is the current that flows in a semiconductor and it is caused by the diffusion of charge carriers like holes.ⓘ Hole Diffusion Current [I_h]			+10% -10%

✖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.ⓘ Emitter Efficiency [η_E]

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Emitter Efficiency Solution

STEP 0: Pre-Calculation Summary

Formula Used

Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current)
η_E = I_nE/(I_nE+I_h)
This formula uses 3 Variables

Variables Used

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.
Electron Diffusion Current - (Measured in Ampere) - Electron Diffusion Current is a current in a semiconductor caused by the diffusion of charge carriers like electrons.
Hole Diffusion Current - (Measured in Ampere) - Hole Diffusion Current is the current that flows in a semiconductor and it is caused by the diffusion of charge carriers like holes.

STEP 1: Convert Input(s) to Base Unit

Electron Diffusion Current: 25 Milliampere --> 0.025 Ampere (Check conversion here)
Hole Diffusion Current: 26 Milliampere --> 0.026 Ampere (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

η_E = I_nE/(I_nE+I_h) --> 0.025/(0.025+0.026)

Evaluating ... ...

η_E = 0.490196078431373

STEP 3: Convert Result to Output's Unit

0.490196078431373 --> No Conversion Required

FINAL ANSWER

0.490196078431373 ≈ 0.490196 <-- Emitter Efficiency

(Calculation completed in 00.004 seconds)

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Created by Akshada Kulkarni

National Institute of Information Technology (NIIT), Neemrana

Akshada Kulkarni has created this Calculator and 500+ more calculators!

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< Transistor Operating Parameters Calculators

Current Amplification Factor using Base Transport Factor

LaTeX Go Current Amplification Factor = Base Transport Factor/(Base Transport Factor+1)

Current Amplification Factor

LaTeX Go Current Amplification Factor = Collector Current/Emitter Current

Collector Current using Base Transport Factor

LaTeX Go Collector Current = Base Transport Factor*Base Current

Emitter Current

LaTeX Go Emitter Current = Base Current+Collector Current

Emitter Efficiency Formula

LaTeX Go

Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current)
η_E = I_nE/(I_nE+I_h)

What increases emitter injection efficiency?

The injection efficiency of the transistor emitter is controlled by the ratio of emitter doping concentration to the base doping concentration. As this ratio increases, the injection efficiency increases.

At high currents, there is a high concentration of injected carriers in base region, thereby increasing its conductivity. The emitter efficiency and therefore transistor beta decreases due to this. However this effect is not always bad. We make use of it in automatic gain control circuit.

How to Calculate Emitter Efficiency?

Emitter Efficiency calculator uses Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current) to calculate 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 calculate Emitter Efficiency using this online calculator? To use this online calculator for Emitter Efficiency, enter Electron Diffusion Current (I_nE) & Hole Diffusion Current (I_h) and hit the calculate button. Here is how the Emitter Efficiency calculation can be explained with given input values -> 0.490196 = 0.025/(0.025+0.026).

FAQ

What is 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 and is represented as η_E = I_nE/(I_nE+I_h) or Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current). Electron Diffusion Current is a current in a semiconductor caused by the diffusion of charge carriers like electrons & Hole Diffusion Current is the current that flows in a semiconductor and it is caused by the diffusion of charge carriers like holes.

How to calculate 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 is calculated using Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current). To calculate Emitter Efficiency, you need Electron Diffusion Current (I_nE) & Hole Diffusion Current (I_h). With our tool, you need to enter the respective value for Electron Diffusion Current & Hole Diffusion Current 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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