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Base Current using Current Amplification Factor Formula

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Base Current is the current flowing through the base terminal of a bipolar junction transistor. Base current is typically 1% of emitter or collector current for small signal transistors. Check FAQs

I b = I e \cdot (1 - α) - I cbo

I_b - Base Current?I_e - Emitter Current?α - Current Amplification Factor?I_cbo - Collector Base Leakage Current?

Base Current using Current Amplification Factor Example

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With units

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Here is how the Base Current using Current Amplification Factor equation looks like with Values.

Here is how the Base Current using Current Amplification Factor equation looks like with Units.

Here is how the Base Current using Current Amplification Factor equation looks like.

0.4465 = 2.75 \cdot (1 - 0.714) - 0.34

0.4465mA = 2.75mA \cdot (1 - 0.714) - 0.34mA

0.4465 = 2.75 \cdot (1 - 0.714) - 0.34

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Base Current using Current Amplification Factor Solution

Follow our step by step solution on how to calculate Base Current using Current Amplification Factor?

FIRST Step Consider the formula

I b = I e \cdot (1 - α) - I cbo

Next Step Substitute values of Variables

∴

I b = 2.75mA \cdot (1 - 0.714) - 0.34mA

Next Step Convert Units

∴

I b = 0.0028A \cdot (1 - 0.714) - 0.0003A

Next Step Prepare to Evaluate

∴

I b = 0.0028 \cdot (1 - 0.714) - 0.0003

Next Step Evaluate

∴

I b = 0.0004465A

LAST Step Convert to Output's Unit

∴

I b = 0.4465mA

Base Current using Current Amplification Factor Formula Elements

Variables

Base Current

Base Current is the current flowing through the base terminal of a bipolar junction transistor. Base current is typically 1% of emitter or collector current for small signal transistors.

Symbol: I_b

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Base Current

Emitter Current

Emitter current is defined as the current flowing through the emitter terminal of a bipolar junction transistor.

Symbol: I_e

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Emitter Current

Current Amplification Factor

Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current.

Symbol: α

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Current Amplification Factor

Collector Base Leakage Current

Collector Base leakage current is a small collector current which flows if the emitter is open circuited and the collector-base junction is reversed biased.

Symbol: I_cbo

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Collector Base Leakage 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 Base Current using Current Amplification Factor?

Base Current using Current Amplification Factor evaluator uses Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current to evaluate the Base Current, Base Current using Current Amplification Factor is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on. Base Current is denoted by I_b symbol.

How to evaluate Base Current using Current Amplification Factor using this online evaluator? To use this online evaluator for Base Current using Current Amplification Factor, enter Emitter Current (I_e), Current Amplification Factor (α) & Collector Base Leakage Current (I_cbo) and hit the calculate button.

FAQs on Base Current using Current Amplification Factor

What is the formula to find Base Current using Current Amplification Factor?

The formula of Base Current using Current Amplification Factor is expressed as Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current. Here is an example- -423.5 = 0.00275*(1-0.714)-0.00034.

How to calculate Base Current using Current Amplification Factor?

With Emitter Current (I_e), Current Amplification Factor (α) & Collector Base Leakage Current (I_cbo) we can find Base Current using Current Amplification Factor using the formula - Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current.

Can the Base Current using Current Amplification Factor be negative?

No, the Base Current using Current Amplification Factor, measured in Electric Current cannot be negative.

Which unit is used to measure Base Current using Current Amplification Factor?

Base Current using Current Amplification Factor 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 using Current Amplification Factor can be measured.

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Base Current using Current Amplification Factor Formula

Base Current using Current Amplification Factor Example

Base Current using Current Amplification Factor Solution

Base Current using Current Amplification Factor Formula Elements

Other formulas in Transistor Operating Parameters category

How to Evaluate Base Current using Current Amplification Factor?

FAQs on Base Current using Current Amplification Factor

Variable Name