Saturation Current Calculator

✖Base Emitter Area is defined as the cross-sectional area of the base emitter junction in an amplifier.ⓘ Base Emitter Area [A_be]			+10% -10%
✖Electron Diffusivity is the diffusion current is a current in a semiconductor caused by the diffusion of charge carriers (holes and/or electrons).ⓘ Electron Diffusivity [D_n]			+10% -10%
✖Thermal Equilibrium Concentration is defined as the concentration of carriers in an amplifier.ⓘ Thermal Equilibrium Concentration [n_po]			+10% -10%
✖Base Junction Width is the parameter which signifies how wide is the base junction of any analog electronics element.ⓘ Base Junction Width [w_b]			+10% -10%

✖Saturation current is the diode leakage current density in the absence of light. It is an important parameter which differentiates one diode from another.ⓘ Saturation Current [i_sat]

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Formula

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Saturation Current

Formula

`"i"_{"sat"} = ("A"_{"be"}*"[Charge-e]"*"D"_{"n"}*"n"_{"po"})/"w"_{"b"}`

Example

`"1.809517mA"=("0.12cm²"*"[Charge-e]"*"0.8cm²/s"*"1e15/cm³")/"0.0085cm"`

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Saturation Current Solution

STEP 0: Pre-Calculation Summary

Formula Used

Saturation Current = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Base Junction Width
i_sat = (A_be*[Charge-e]*D_n*n_po)/w_b
This formula uses 1 Constants, 5 Variables

Constants Used

[Charge-e] - Charge of electron Value Taken As 1.60217662E-19

Variables Used

Saturation Current - (Measured in Ampere) - Saturation current is the diode leakage current density in the absence of light. It is an important parameter which differentiates one diode from another.
Base Emitter Area - (Measured in Square Meter) - Base Emitter Area is defined as the cross-sectional area of the base emitter junction in an amplifier.
Electron Diffusivity - (Measured in Square Meter Per Second) - Electron Diffusivity is the diffusion current is a current in a semiconductor caused by the diffusion of charge carriers (holes and/or electrons).
Thermal Equilibrium Concentration - (Measured in 1 per Cubic Meter) - Thermal Equilibrium Concentration is defined as the concentration of carriers in an amplifier.
Base Junction Width - (Measured in Meter) - Base Junction Width is the parameter which signifies how wide is the base junction of any analog electronics element.

STEP 1: Convert Input(s) to Base Unit

Base Emitter Area: 0.12 Square Centimeter --> 1.2E-05 Square Meter (Check conversion here)
Electron Diffusivity: 0.8 Square Centimeter Per Second --> 8E-05 Square Meter Per Second (Check conversion here)
Thermal Equilibrium Concentration: 1E+15 1 per Cubic Centimeter --> 1E+21 1 per Cubic Meter (Check conversion here)
Base Junction Width: 0.0085 Centimeter --> 8.5E-05 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

i_sat = (A_be*[Charge-e]*D_n*n_po)/w_b --> (1.2E-05*[Charge-e]*8E-05*1E+21)/8.5E-05

Evaluating ... ...

i_sat = 0.00180951712376471

STEP 3: Convert Result to Output's Unit

0.00180951712376471 Ampere -->1.80951712376471 Milliampere (Check conversion here)

FINAL ANSWER

1.80951712376471 ≈ 1.809517 Milliampere <-- Saturation Current

(Calculation completed in 00.004 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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< 21 Amplifier Characteristics Calculators

Base Junction Width of Amplifier

Go Base Junction Width = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Saturation Current

Saturation Current

Go Saturation Current = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Base Junction Width

Differential Voltage in Amplifier

Go Differential Input Signal = Output Voltage/((Resistance 4/Resistance 3)*(1+(Resistance 2)/Resistance 1))

Output Voltage for Instrumentation Amplifier

Go Output Voltage = (Resistance 4/Resistance 3)*(1+(Resistance 2)/Resistance 1)*Differential Input Signal

Voltage Gain given Load Resistance

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

Load Power of Amplifier

Go Load Power = (Positive DC Voltage*Positive DC Current)+(Negative DC Voltage*Negative DC Current)

Signal Voltage of Amplifier

Go Signal Voltage = Input Voltage*((Input Resistance+Signal Resistance)/Input Resistance)

Input Voltage of Amplifier

Go Input Voltage = (Input Resistance/(Input Resistance+Signal Resistance))*Signal Voltage

Differential Gain of Instrumentation Amplifier

Go Differential Mode Gain = (Resistance 4/Resistance 3)*(1+(Resistance 2)/Resistance 1)

Load Resistance with respect to Transconductance

Go Load Resistance = -(Output Voltage Gain*(1/Transconductance+Series Resistor))

Output Voltage Gain given Transconductance

Go Output Voltage Gain = -(Load Resistance/(1/Transconductance+Series Resistor))

Open-Circuit Transresistance

Go Open Circuit Transresistance = Output Voltage/Input Current

Amplifier Power Efficiency

Go Power Efficiency Percentage = 100*(Load Power/Input Power)

Current Gain of Amplifier in Decibels

Go Current Gain in Decibels = 20*(log10(Current Gain))

Output Voltage of Amplifier

Go Output Voltage = Voltage Gain*Input Voltage

Current Gain of Amplifier

Go Current Gain = Output Current/Input Current

Voltage Gain of Amplifier

Go Voltage Gain = Output Voltage/Input Voltage

Input Voltage at Maximum Power Dissipation

Go Input Voltage = (Peak Voltage*pi)/2

Peak Voltage at Maximum Power Dissipation

Go Peak Voltage = (2*Input Voltage)/pi

Power Gain of Amplifier

Go Power Gain = Load Power/Input Power

Open Circuit Time Constant of Amplifier

Go Open Circuit Time Constant = 1/Pole Frequency

Saturation Current Formula

Saturation Current = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Base Junction Width
i_sat = (A_be*[Charge-e]*D_n*n_po)/w_b

Why do we calculate Saturation Current in transistor?

Calculating saturation current in transistors is crucial for understanding their behavior and performance. Saturation current is the current at which the transistor's output voltage is no longer affected by the input current. It represents the maximum current that the transistor can handle without extensively distorting its output.

How to Calculate Saturation Current?

Saturation Current calculator uses Saturation Current = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Base Junction Width to calculate the Saturation Current, The Saturation current for a BJT is the point where a further increase in base current will not result in a corresponding increase in collector current. Saturation Current is denoted by i_sat symbol.

How to calculate Saturation Current using this online calculator? To use this online calculator for Saturation Current, enter Base Emitter Area (A_be), Electron Diffusivity (D_n), Thermal Equilibrium Concentration (n_po) & Base Junction Width (w_b) and hit the calculate button. Here is how the Saturation Current calculation can be explained with given input values -> 1809.517 = (0.12*[Charge-e]*8E-05*1E+15)/8.5E-05.

FAQ

What is Saturation Current?

The Saturation current for a BJT is the point where a further increase in base current will not result in a corresponding increase in collector current and is represented as i_sat = (A_be*[Charge-e]*D_n*n_po)/w_b or Saturation Current = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Base Junction Width. Base Emitter Area is defined as the cross-sectional area of the base emitter junction in an amplifier, Electron Diffusivity is the diffusion current is a current in a semiconductor caused by the diffusion of charge carriers (holes and/or electrons), Thermal Equilibrium Concentration is defined as the concentration of carriers in an amplifier & Base Junction Width is the parameter which signifies how wide is the base junction of any analog electronics element.

How to calculate Saturation Current?

The Saturation current for a BJT is the point where a further increase in base current will not result in a corresponding increase in collector current is calculated using Saturation Current = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Base Junction Width. To calculate Saturation Current, you need Base Emitter Area (A_be), Electron Diffusivity (D_n), Thermal Equilibrium Concentration (n_po) & Base Junction Width (w_b). With our tool, you need to enter the respective value for Base Emitter Area, Electron Diffusivity, Thermal Equilibrium Concentration & Base Junction Width 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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