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Base Current of PNP Transistor using Common-Base Current Gain Formula

GoBase Current of PNP Transistor given Emitter Current Formula

GoBase Current of PNP Transistor using Collector Current 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 = (1 - α) \cdot I e

I_B - Base Current?α - Common-Base Current Gain?I_e - Emitter Current?

Base Current of PNP Transistor using Common-Base Current Gain Example

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With units

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Here is how the Base Current of PNP Transistor using Common-Base Current Gain equation looks like with Values.

Here is how the Base Current of PNP Transistor using Common-Base Current Gain equation looks like with Units.

Here is how the Base Current of PNP Transistor using Common-Base Current Gain equation looks like.

0.0762 = (1 - 0.985) \cdot 5.077

0.0762mA = (1 - 0.985) \cdot 5.077mA

0.0762 = (1 - 0.985) \cdot 5.077

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Base Current of PNP Transistor using Common-Base Current Gain Solution

Follow our step by step solution on how to calculate Base Current of PNP Transistor using Common-Base Current Gain?

FIRST Step Consider the formula

I B = (1 - α) \cdot I e

Next Step Substitute values of Variables

∴

I B = (1 - 0.985) \cdot 5.077mA

Next Step Convert Units

∴

I B = (1 - 0.985) \cdot 0.0051A

Next Step Prepare to Evaluate

∴

I B = (1 - 0.985) \cdot 0.0051

Next Step Evaluate

∴

I B = 7.61550000000001E-05A

Next Step Convert to Output's Unit

∴

I B = 0.0761550000000001mA

LAST Step Rounding Answer

∴

I B = 0.0762mA

Base Current of PNP Transistor using Common-Base Current Gain 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

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

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

Other Formulas to find Base Current

Go Base Current of PNP Transistor given Emitter Current

I B = \frac{I e}{β + 1}

Go Base Current of PNP Transistor using Collector Current

I B = \frac{I c}{β}

Go Base Current of PNP Transistor using Saturation Current

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

Other formulas in Base Current category

Go Common-Base Current Gain

α = \frac{β}{β + 1}

Go Intrinsic Gain of BJT

A o = \frac{V A}{V t}

Go Total Power Dissipated in BJT

P = V CE \cdot I c + V BE \cdot I B

Go Common Mode Rejection Ratio

CMRR = 20 \cdot \log 10 (\frac{A d}{A cm})

How to Evaluate Base Current of PNP Transistor using Common-Base Current Gain?

Base Current of PNP Transistor using Common-Base Current Gain evaluator uses Base Current = (1-Common-Base Current Gain)*Emitter Current to evaluate the Base Current, The Base Current of PNP Transistor using Common-Base Current Gain is proportional to the number of electrons injected into the base. Base Current is denoted by I_B symbol.

How to evaluate Base Current of PNP Transistor using Common-Base Current Gain using this online evaluator? To use this online evaluator for Base Current of PNP Transistor using Common-Base Current Gain, enter Common-Base Current Gain (α) & Emitter Current (I_e) and hit the calculate button.

FAQs on Base Current of PNP Transistor using Common-Base Current Gain

What is the formula to find Base Current of PNP Transistor using Common-Base Current Gain?

The formula of Base Current of PNP Transistor using Common-Base Current Gain is expressed as Base Current = (1-Common-Base Current Gain)*Emitter Current. Here is an example- 76.155 = (1-0.985)*0.005077.

How to calculate Base Current of PNP Transistor using Common-Base Current Gain?

With Common-Base Current Gain (α) & Emitter Current (I_e) we can find Base Current of PNP Transistor using Common-Base Current Gain using the formula - Base Current = (1-Common-Base Current Gain)*Emitter Current.

What are the other ways to Calculate Base Current?

Here are the different ways to Calculate Base Current-

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

Can the Base Current of PNP Transistor using Common-Base Current Gain be negative?

No, the Base Current of PNP Transistor using Common-Base Current Gain, measured in Electric Current cannot be negative.

Which unit is used to measure Base Current of PNP Transistor using Common-Base Current Gain?

Base Current of PNP Transistor using Common-Base Current Gain 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 of PNP Transistor using Common-Base Current Gain can be measured.

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