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Base Current 1 of BJT Formula

GoBase Current 2 of BJT Formula

GoBase Current using Saturation Current in DC Formula

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Base Current is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on. Check FAQs

I B = \frac{I c}{β}

I_B - Base Current?I_c - Collector Current?β - Common Emitter Current Gain?

Base Current 1 of BJT Example

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With units

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Here is how the Base Current 1 of BJT equation looks like with Values.

Here is how the Base Current 1 of BJT equation looks like with Units.

Here is how the Base Current 1 of BJT equation looks like.

0.0769 = \frac{5}{65}

0.0769mA = \frac{5mA}{65}

0.0769 = \frac{5}{65}

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Base Current 1 of BJT Solution

Follow our step by step solution on how to calculate Base Current 1 of BJT?

FIRST Step Consider the formula

I B = \frac{I c}{β}

Next Step Substitute values of Variables

∴

I B = \frac{5mA}{65}

Next Step Convert Units

∴

I B = \frac{0.005A}{65}

Next Step Prepare to Evaluate

∴

I B = \frac{0.005}{65}

Next Step Evaluate

∴

I B = 7.69230769230769E-05A

Next Step Convert to Output's Unit

∴

I B = 0.0769230769230769mA

LAST Step Rounding Answer

∴

I B = 0.0769mA

Base Current 1 of BJT Formula Elements

Variables

Base Current

Base Current is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.

Symbol: I_B

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Base Current

Collector Current

Collector current is an amplified output current of a bipolar junction transistor.

Symbol: I_c

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Collector Current

Common Emitter Current Gain

Common emitter current gain is influenced by 2 factors: width of base region W, and relative dopings of base region and emitter region. Its range varies from 50-200.

Symbol: β

Measurement: NAUnit: Unitless

Note: Value should be between 49 to 201.

Formulas to find Common Emitter Current Gain

Other Formulas to find Base Current

Go Base Current 2 of BJT

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

Go Base Current using Saturation Current in DC

I B = (\frac{I sat}{β}) \cdot e^{\frac{V BC}{V t}} + e s \cdot e^{\frac{V BC}{V t}}

Go Total Base Current

I B = I B1 + I B2

Go Base Current of PNP Transistor using Collector Current

I B = \frac{I c}{β}

Other formulas in Base Current category

Go Drain Current given Device Parameter

I d = \frac{1}{2} \cdot G m \cdot WL \cdot {(V ov - V th)}^{2} \cdot (1 + V A \cdot V DS)

Go Reference Current of BJT Current Mirror

I ref = \frac{V DD - V BE}{R}

Go Reference Current of BJT Mirror given Collector Current

I ref = I c \cdot (1 + \frac{2}{β})

Go Saturation Current using Doping Concentration

I sat = \frac{A E \cdot [Charge-e] \cdot D n \cdot {(n i1)}^{2}}{W base \cdot N B}

How to Evaluate Base Current 1 of BJT?

Base Current 1 of BJT evaluator uses Base Current = Collector Current/Common Emitter Current Gain to evaluate the Base Current, The Base Current 1 of BJT is due to holes that have to be supplied by the external circuit in order to replace the holes lost from the base through the recombination process. Base Current is denoted by I_B symbol.

How to evaluate Base Current 1 of BJT using this online evaluator? To use this online evaluator for Base Current 1 of BJT, enter Collector Current (I_c) & Common Emitter Current Gain (β) and hit the calculate button.

FAQs on Base Current 1 of BJT

What is the formula to find Base Current 1 of BJT?

The formula of Base Current 1 of BJT is expressed as Base Current = Collector Current/Common Emitter Current Gain. Here is an example- 76.92308 = 0.005/65.

How to calculate Base Current 1 of BJT?

With Collector Current (I_c) & Common Emitter Current Gain (β) we can find Base Current 1 of BJT using the formula - Base Current = Collector Current/Common Emitter Current Gain.

What are the other ways to Calculate Base Current?

Here are the different ways to Calculate Base Current-

Base Current=(Saturation Current/Common Emitter Current Gain)*(e^(Base-Emitter Voltage/Thermal Voltage))
Base Current=(Saturation Current/Common Emitter Current Gain)*e^(Base-Collector Voltage/Thermal Voltage)+Saturation Vapour Pressure*e^(Base-Collector Voltage/Thermal Voltage)
Base Current=Base Current 1+Base Current 2

Can the Base Current 1 of BJT be negative?

No, the Base Current 1 of BJT, measured in Electric Current cannot be negative.

Which unit is used to measure Base Current 1 of BJT?

Base Current 1 of BJT is usually measured using the Milliampere[mA] for Electric Current. Ampere[mA], Microampere[mA], Centiampere[mA] are the few other units in which Base Current 1 of BJT can be measured.

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