Current Amplification Factor Calculator

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Transistor Operating Parameters

Charge Carrier Characteristics

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Semiconductor Characteristics

✖Collector current is defined as the current flowing through the collector terminal of a transistor.ⓘ Collector Current [I_c]			+10% -10%
✖Emitter current is defined as the current flowing through the emitter terminal of a bipolar junction transistor.ⓘ Emitter Current [I_e]			+10% -10%

✖Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current.ⓘ Current Amplification Factor [α]

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Formula

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Current Amplification Factor

Formula

`"α" = "I"_{"c"}/"I"_{"e"}`

Example

`"0.4"="1.1mA"/"2.75mA"`

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Current Amplification Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Current Amplification Factor = Collector Current/Emitter Current
α = I_c/I_e
This formula uses 3 Variables

Variables Used

Current Amplification Factor - Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current.
Collector Current - (Measured in Ampere) - Collector current is defined as the current flowing through the collector terminal of a transistor.
Emitter Current - (Measured in Ampere) - Emitter current is defined as the current flowing through the emitter terminal of a bipolar junction transistor.

STEP 1: Convert Input(s) to Base Unit

Collector Current: 1.1 Milliampere --> 0.0011 Ampere (Check conversion here)
Emitter Current: 2.75 Milliampere --> 0.00275 Ampere (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

α = I_c/I_e --> 0.0011/0.00275

Evaluating ... ...

α = 0.4

STEP 3: Convert Result to Output's Unit

0.4 --> No Conversion Required

FINAL ANSWER

0.4 <-- Current Amplification Factor

(Calculation completed in 00.020 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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< 13 Transistor Operating Parameters Calculators

Drain Current

Go Drain Current = Mobility of Electron*Gate Oxide Capacitance*(Gate Junction Width/Gate Length)*(Gate Source Voltage-Threshold Voltage)*Drain Source Saturation Voltage

Emitter Efficiency

Go Emitter Efficiency = Electron Diffusion Current/(Electron Diffusion Current+Hole Diffusion Current)

Base Current using Current Amplification Factor

Go Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current

Collector-Emitter Voltage

Go Collector Emitter Voltage = Common Collector Voltage-Collector Current*Collector Resistance

Collector to Emitter Leakage Current

Go Collector Emitter Leakage Current = (Base Transport Factor+1)*Collector Base Leakage Current

Current Amplification Factor using Base Transport Factor

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

Collector Current using Current Amplification Factor

Go Collector Current = Current Amplification Factor*Emitter Current

Current Amplification Factor

Go Current Amplification Factor = Collector Current/Emitter Current

Collector Current using Base Transport Factor

Go Collector Current = Base Transport Factor*Base Current

Base Transport Factor

Go Base Transport Factor = Collector Current/Base Current

Emitter Current

Go Emitter Current = Base Current+Collector Current

Common Collector Current Gain

Go Common Collector Current Gain = Base Transport Factor+1

Dynamic Emitter Resistance

Go Dynamic Emitter Resistance = 0.026/Emitter Current

Current Amplification Factor Formula

Current Amplification Factor = Collector Current/Emitter Current
α = I_c/I_e

Define Current Amplification Factor.

As the emitter current for a common emitter configuration is defined as Ie = Ic + Ib, the ratio of Ic/Ie is called Alpha, given the Greek symbol of α. Since the emitter current is also the input current, any changes to the input current will create a corresponding change in the collector current.

How to Calculate Current Amplification Factor?

Current Amplification Factor calculator uses Current Amplification Factor = Collector Current/Emitter Current to calculate the Current Amplification Factor, Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current. In a common base configuration, current amplification factor is the ratio of collector current to the emitter current. Current Amplification Factor is denoted by α symbol.

How to calculate Current Amplification Factor using this online calculator? To use this online calculator for Current Amplification Factor, enter Collector Current (I_c) & Emitter Current (I_e) and hit the calculate button. Here is how the Current Amplification Factor calculation can be explained with given input values -> 0.714 = 0.0011/0.00275.

FAQ

What is Current Amplification Factor?

Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current. In a common base configuration, current amplification factor is the ratio of collector current to the emitter current and is represented as α = I_c/I_e or Current Amplification Factor = Collector Current/Emitter Current. Collector current is defined as the current flowing through the collector terminal of a transistor & Emitter current is defined as the current flowing through the emitter terminal of a bipolar junction transistor.

How to calculate Current Amplification Factor?

Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current. In a common base configuration, current amplification factor is the ratio of collector current to the emitter current is calculated using Current Amplification Factor = Collector Current/Emitter Current. To calculate Current Amplification Factor, you need Collector Current (I_c) & Emitter Current (I_e). With our tool, you need to enter the respective value for Collector Current & Emitter Current 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 Current Amplification Factor?

In this formula, Current Amplification Factor uses Collector Current & Emitter Current. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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