Base Current using Current Amplification Factor Calculator

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Transistor Operating Parameters

Charge Carrier Characteristics

Diode Characteristics

Electrostatic Parameters

Semiconductor Characteristics

✖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]			+10% -10%
✖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.ⓘ Collector Base Leakage Current [I_cbo]			+10% -10%

✖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.ⓘ Base Current using Current Amplification Factor [I_b]

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Formula

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Base Current using Current Amplification Factor

Formula

`"I"_{"b"} = "I"_{"e"}*(1-"α")-"I"_{"cbo"}`

Example

`"0.4465mA"="2.75mA"*(1-"0.714")-"0.34mA"`

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Base Current using Current Amplification Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current
I_b = I_e*(1-α)-I_cbo
This formula uses 4 Variables

Variables Used

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

STEP 1: Convert Input(s) to Base Unit

Emitter Current: 2.75 Milliampere --> 0.00275 Ampere (Check conversion here)
Current Amplification Factor: 0.714 --> No Conversion Required
Collector Base Leakage Current: 0.34 Milliampere --> 0.00034 Ampere (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_b = I_e*(1-α)-I_cbo --> 0.00275*(1-0.714)-0.00034

Evaluating ... ...

I_b = 0.0004465

STEP 3: Convert Result to Output's Unit

0.0004465 Ampere -->0.4465 Milliampere (Check conversion here)

FINAL ANSWER

0.4465 Milliampere <-- Base Current

(Calculation completed in 00.004 seconds)

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National Institute of Information Technology (NIIT), Neemrana

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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

Base Current using Current Amplification Factor Formula

Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current
I_b = I_e*(1-α)-I_cbo

How is base current calculated?

There are several ways to find the base current, Ib, of a transistor. And it all depends on what information is already known about the transistor:
If the emitter current, Ie, and α are known, then Ib can be computed by the following formula:
Base current Ib = ( 1 - current amplification factor, α) * emitter current of a transistor.

How to Calculate Base Current using Current Amplification Factor?

Base Current using Current Amplification Factor calculator uses Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current to calculate 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 calculate Base Current using Current Amplification Factor using this online calculator? To use this online calculator 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. Here is how the Base Current using Current Amplification Factor calculation can be explained with given input values -> -423.5 = 0.00275*(1-0.714)-0.00034.

FAQ

What is Base Current using Current Amplification Factor?

Base Current using Current Amplification Factor is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on and is represented as I_b = I_e*(1-α)-I_cbo or Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current. Emitter current is defined as the current flowing through the emitter terminal of a bipolar junction transistor, Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input 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.

How to calculate Base Current using Current Amplification Factor?

Base Current using Current Amplification Factor is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on is calculated using Base Current = Emitter Current*(1-Current Amplification Factor)-Collector Base Leakage Current. To calculate Base Current using Current Amplification Factor, you need Emitter Current (I_e), Current Amplification Factor (α) & Collector Base Leakage Current (I_cbo). With our tool, you need to enter the respective value for Emitter Current, Current Amplification Factor & Collector Base Leakage Current and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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