Amplification Factor of BJT Calculator

✖Collector current is an amplified output current of a bipolar junction transistor.ⓘ Collector Current [I_c]			+10% -10%
✖Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals.ⓘ Threshold Voltage [V_th]			+10% -10%
✖Positive DC Voltage provided to the amplifier.ⓘ Positive DC Voltage [V_cc]			+10% -10%
✖Collector-Emitter Voltage is the electric potential between the base and collector region of a transistor.ⓘ Collector-Emitter Voltage [V_CE]			+10% -10%

✖BJT Amplification Factor is the product of the transconductance and output resistance.ⓘ Amplification Factor of BJT [µ_f]

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Formula

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Amplification Factor of BJT

Formula

`"µ"_{"f"} = ("I"_{"c"}/"V"_{"th"})*(("V"_{"cc"}+"V"_{"CE"})/"I"_{"c"})`

Example

`"4.1"=("5mA"/"5.50V")*(("19.4V"+"3.15V")/"5mA")`

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Amplification Factor of BJT Solution

STEP 0: Pre-Calculation Summary

Formula Used

BJT Amplification Factor = (Collector Current/Threshold Voltage)*((Positive DC Voltage+Collector-Emitter Voltage)/Collector Current)
µ_f = (I_c/V_th)*((V_cc+V_CE)/I_c)
This formula uses 5 Variables

Variables Used

BJT Amplification Factor - BJT Amplification Factor is the product of the transconductance and output resistance.
Collector Current - (Measured in Ampere) - Collector current is an amplified output current of a bipolar junction transistor.
Threshold Voltage - (Measured in Volt) - Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals.
Positive DC Voltage - (Measured in Volt) - Positive DC Voltage provided to the amplifier.
Collector-Emitter Voltage - (Measured in Volt) - Collector-Emitter Voltage is the electric potential between the base and collector region of a transistor.

STEP 1: Convert Input(s) to Base Unit

Collector Current: 5 Milliampere --> 0.005 Ampere (Check conversion here)
Threshold Voltage: 5.5 Volt --> 5.5 Volt No Conversion Required
Positive DC Voltage: 19.4 Volt --> 19.4 Volt No Conversion Required
Collector-Emitter Voltage: 3.15 Volt --> 3.15 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

µ_f = (I_c/V_th)*((V_cc+V_CE)/I_c) --> (0.005/5.5)*((19.4+3.15)/0.005)

Evaluating ... ...

µ_f = 4.1

STEP 3: Convert Result to Output's Unit

4.1 --> No Conversion Required

FINAL ANSWER

4.1 <-- BJT Amplification Factor

(Calculation completed in 00.004 seconds)

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Birsa Institute of Technology (BIT), Sindri

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Jaipur Engineering College and Research Centre (JECRC), Jaipur

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< 16 Amplification Factor/Gain Calculators

Amplification Factor of BJT

Go BJT Amplification Factor = (Collector Current/Threshold Voltage)*((Positive DC Voltage+Collector-Emitter Voltage)/Collector Current)

Overall Voltage Gain of Amplifier when Load Resistance is Connected to Output

Go Voltage Gain = Common-Base Current Gain*(1/Collector Resistance+1/Load Resistance)^-1/(Signal Resistance+Emitter Resistance)

Overall Voltage Gain of Buffer Amplifier given Load Resistance

Go Voltage Gain = Load Resistance/(Load Resistance+Emitter Resistance+Signal Resistance/(Common Emitter Current Gain+1))

Overall Voltage Gain given Load Resistance of BJT

Go Voltage Gain = -Transconductance*((Collector Resistance*Load Resistance)/(Collector Resistance+Load Resistance))

Common Mode Gain of BJT

Go Common Mode Gain = -(Collector Resistance/(2*Output Resistance))*(Change in Collector Resistance/Collector Resistance)

Total Power Dissipated in BJT

Go Power = Collector-Emitter Voltage*Collector Current+Base-Emitter Voltage*Base Current

Voltage Gain given all Voltages

Go Voltage Gain = -(Supply Voltage-Collector-Emitter Voltage)/Thermal Voltage

Voltage Gain given Collector Current

Go Voltage Gain = -(Collector Current/Thermal Voltage)*Collector Resistance

Total Power Supplied in BJT

Go Power = Supply Voltage*(Collector Current+Input Current)

Common-Base Current Gain

Go Common-Base Current Gain = Common Emitter Current Gain/(Common Emitter Current Gain+1)

Common-Emitter Current Gain using Common-Base Current Gain

Go Common Emitter Current Gain = Common-Base Current Gain/(1-Common-Base Current Gain)

Open Circuit Voltage Gain given Open Circuit Transresistance

Go Open Circuit Voltage Gain = Open Circuit Transresistance/Input Resistance

Forced Common-Emitter Current Gain

Go Forced Common-Emitter Current Gain = Collector Current/Base Current

Voltage Gain given Transconductance and Collector Resistance

Go Voltage Gain = -Transconductance*Collector Resistance

Intrinsic Gain of BJT

Go Intrinsic Gain = Early Voltage/Thermal Voltage

Short-Circuit Current Gain

Go Current Gain = Output Current/Input Current

Amplification Factor of BJT Formula

BJT Amplification Factor = (Collector Current/Threshold Voltage)*((Positive DC Voltage+Collector-Emitter Voltage)/Collector Current)
µ_f = (I_c/V_th)*((V_cc+V_CE)/I_c)

What is amplification in BJT?

A transistor acts as an amplifier by raising the strength of a weak signal. The DC bias voltage applied to the emitter-base junction, makes it remain in forward biased condition. This forward bias is maintained regardless of the polarity of the signal.

How to Calculate Amplification Factor of BJT?

Amplification Factor of BJT calculator uses BJT Amplification Factor = (Collector Current/Threshold Voltage)*((Positive DC Voltage+Collector-Emitter Voltage)/Collector Current) to calculate the BJT Amplification Factor, The Amplification factor of BJT in a BJT transistor is defined as the ratio of output current to its input current. In a common base configuration, the current amplification factor is the ratio of collector current to the emitter current. BJT Amplification Factor is denoted by µ_f symbol.

How to calculate Amplification Factor of BJT using this online calculator? To use this online calculator for Amplification Factor of BJT, enter Collector Current (I_c), Threshold Voltage (V_th), Positive DC Voltage (V_cc) & Collector-Emitter Voltage (V_CE) and hit the calculate button. Here is how the Amplification Factor of BJT calculation can be explained with given input values -> 4.1 = (0.005/5.5)*((19.4+3.15)/0.005).

FAQ

What is Amplification Factor of BJT?

The Amplification factor of BJT in a BJT transistor is defined as the ratio of output current to its input current. In a common base configuration, the current amplification factor is the ratio of collector current to the emitter current and is represented as µ_f = (I_c/V_th)*((V_cc+V_CE)/I_c) or BJT Amplification Factor = (Collector Current/Threshold Voltage)*((Positive DC Voltage+Collector-Emitter Voltage)/Collector Current). Collector current is an amplified output current of a bipolar junction transistor, Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals, Positive DC Voltage provided to the amplifier & Collector-Emitter Voltage is the electric potential between the base and collector region of a transistor.

How to calculate Amplification Factor of BJT?

The Amplification factor of BJT in a BJT transistor is defined as the ratio of output current to its input current. In a common base configuration, the current amplification factor is the ratio of collector current to the emitter current is calculated using BJT Amplification Factor = (Collector Current/Threshold Voltage)*((Positive DC Voltage+Collector-Emitter Voltage)/Collector Current). To calculate Amplification Factor of BJT, you need Collector Current (I_c), Threshold Voltage (V_th), Positive DC Voltage (V_cc) & Collector-Emitter Voltage (V_CE). With our tool, you need to enter the respective value for Collector Current, Threshold Voltage, Positive DC Voltage & Collector-Emitter Voltage 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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