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Emitter Current using Transistor Constant Formula

GoEmitter Current using Common Emitter Current Gain Formula

GoEmitter Current using Collector Current and Current Gain Formula

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Emitter Current is the amplified output current of a bipolar junction transistor. Check FAQs

I e = (\frac{I sat}{α}) \cdot e^{\frac{V BE}{V t}}

I_e - Emitter Current?I_sat - Saturation Current?α - Common-Base Current Gain?V_BE - Base-Emitter Voltage?V_t - Thermal Voltage?

Emitter Current using Transistor Constant Example

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Here is how the Emitter Current using Transistor Constant equation looks like with Values.

Here is how the Emitter Current using Transistor Constant equation looks like with Units.

Here is how the Emitter Current using Transistor Constant equation looks like.

5.0869 = (\frac{1.675}{0.985}) \cdot e^{\frac{5.15}{4.7}}

5.0869mA = (\frac{1.675mA}{0.985}) \cdot e^{\frac{5.15V}{4.7V}}

5.0869 = (\frac{1.675}{0.985}) \cdot e^{\frac{5.15}{4.7}}

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Emitter Current using Transistor Constant Solution

Follow our step by step solution on how to calculate Emitter Current using Transistor Constant?

FIRST Step Consider the formula

I e = (\frac{I sat}{α}) \cdot e^{\frac{V BE}{V t}}

Next Step Substitute values of Variables

∴

I e = (\frac{1.675mA}{0.985}) \cdot e^{\frac{5.15V}{4.7V}}

Next Step Convert Units

∴

I e = (\frac{0.0017A}{0.985}) \cdot e^{\frac{5.15V}{4.7V}}

Next Step Prepare to Evaluate

∴

I e = (\frac{0.0017}{0.985}) \cdot e^{\frac{5.15}{4.7}}

Next Step Evaluate

∴

I e = 0.00508691463117838A

Next Step Convert to Output's Unit

∴

I e = 5.08691463117838mA

LAST Step Rounding Answer

∴

I e = 5.0869mA

Emitter Current using Transistor Constant Formula Elements

Variables

Emitter Current

Emitter Current is the amplified output current of a bipolar junction transistor.

Symbol: I_e

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Emitter Current

Saturation Current

Saturation Current is the diode leakage current density in the absence of light. It is an important parameter which differentiates one diode from another.

Symbol: I_sat

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Saturation Current

Common-Base Current Gain

Common-base current gain α is related to β common-emitter current gain and its value is less than 1 because collector current is always less than emitter current due to recombination of electrons.

Symbol: α

Measurement: NAUnit: Unitless

Note: Value should be less than 1.

Formulas to find Common-Base Current Gain

Base-Emitter Voltage

Base-Emitter Voltage is the forward voltage between the base and emitter of the transistor.

Symbol: V_BE

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Base-Emitter Voltage

Thermal Voltage

Thermal Voltage is the voltage produced within the p-n junction.

Symbol: V_t

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Thermal Voltage

Other Formulas to find Emitter Current

Go Emitter Current using Common Emitter Current Gain

I e = (\frac{β + 1}{β}) \cdot I sat \cdot e^{\frac{V BE}{V t}}

Go Emitter Current using Collector Current and Current Gain

I e = (\frac{β + 1}{β}) \cdot I c

Go Emitter Current through Minority Carrier Concentration

I e = A E \cdot [Charge-e] \cdot D n \cdot (- \frac{n po}{W base})

Go Emitter Current given Base Current

I e = (I d + 1) \cdot I B

Other formulas in Emitter Current category

Go Emitter Current given Base-Emitter Voltage

I E = I sat \cdot (\exp (\frac{[Charge-e] \cdot V BE}{[BoltZ] \cdot t o} - 1))

How to Evaluate Emitter Current using Transistor Constant?

Emitter Current using Transistor Constant evaluator uses Emitter Current = (Saturation Current/Common-Base Current Gain)*e^(Base-Emitter Voltage/Thermal Voltage) to evaluate the Emitter Current, The Emitter current using transistor constant is the amplified output current of a Bipolar Junction Transistor. Emitter Current is denoted by I_e symbol.

How to evaluate Emitter Current using Transistor Constant using this online evaluator? To use this online evaluator for Emitter Current using Transistor Constant, enter Saturation Current (I_sat), Common-Base Current Gain (α), Base-Emitter Voltage (V_BE) & Thermal Voltage (V_t) and hit the calculate button.

FAQs on Emitter Current using Transistor Constant

What is the formula to find Emitter Current using Transistor Constant?

The formula of Emitter Current using Transistor Constant is expressed as Emitter Current = (Saturation Current/Common-Base Current Gain)*e^(Base-Emitter Voltage/Thermal Voltage). Here is an example- 5086.915 = (0.001675/0.985)*e^(5.15/4.7).

How to calculate Emitter Current using Transistor Constant?

With Saturation Current (I_sat), Common-Base Current Gain (α), Base-Emitter Voltage (V_BE) & Thermal Voltage (V_t) we can find Emitter Current using Transistor Constant using the formula - Emitter Current = (Saturation Current/Common-Base Current Gain)*e^(Base-Emitter Voltage/Thermal Voltage).

What are the other ways to Calculate Emitter Current?

Here are the different ways to Calculate Emitter Current-

Emitter Current=((Common Emitter Current Gain+1)/Common Emitter Current Gain)*Saturation Current*e^(Base-Emitter Voltage/Thermal Voltage)
Emitter Current=((Common Emitter Current Gain+1)/Common Emitter Current Gain)*Collector Current
Emitter Current=Cross-section Area of Base-Emitter Junction*[Charge-e]*Electron Diffusivity*(-Thermal Equilibrium Concentration/Width of Base Junction)

Can the Emitter Current using Transistor Constant be negative?

Yes, the Emitter Current using Transistor Constant, measured in Electric Current can be negative.

Which unit is used to measure Emitter Current using Transistor Constant?

Emitter Current using Transistor Constant is usually measured using the Milliampere[mA] for Electric Current. Ampere[mA], Microampere[mA], Centiampere[mA] are the few other units in which Emitter Current using Transistor Constant can be measured.

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Emitter Current using Transistor Constant Formula

​GoEmitter Current using Common Emitter Current Gain Formula

​GoEmitter Current using Collector Current and Current Gain Formula

Emitter Current using Transistor Constant Example

Emitter Current using Transistor Constant Solution

Emitter Current using Transistor Constant Formula Elements

Other Formulas to find Emitter Current

Other formulas in Emitter Current category

How to Evaluate Emitter Current using Transistor Constant?

FAQs on Emitter Current using Transistor Constant

Variable Name

GoEmitter Current using Common Emitter Current Gain Formula

GoEmitter Current using Collector Current and Current Gain Formula