Saturation Current of Emitter Follower Calculator

✖Collector current is an amplified output current of a bipolar junction transistor.ⓘ Collector Current [i_c]			+10% -10%
✖The Voltage across Base Emitter Junction is the forward voltage between the base and emitter of the transistor.ⓘ Voltage across Base Emitter Junction [V_be]			+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_t]			+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 of Emitter Follower [i_s]

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Formula

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Saturation Current of Emitter Follower

Formula

`"i"_{"s"} = "i"_{"c"}/e^("V"_{"be"}/"V"_{"t"})`

Example

`"0.01002mA"="39.52mA"/e^("16.56V"/"2V")`

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Saturation Current of Emitter Follower Solution

STEP 0: Pre-Calculation Summary

Formula Used

Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage)
i_s = i_c/e^(V_be/V_t)
This formula uses 1 Constants, 4 Variables

Constants Used

e - Napier's constant Value Taken As 2.71828182845904523536028747135266249

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.
Collector Current - (Measured in Ampere) - Collector current is an amplified output current of a bipolar junction transistor.
Voltage across Base Emitter Junction - (Measured in Volt) - The Voltage across Base Emitter Junction is the forward voltage between the base and emitter of the 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.

STEP 1: Convert Input(s) to Base Unit

Collector Current: 39.52 Milliampere --> 0.03952 Ampere (Check conversion here)
Voltage across Base Emitter Junction: 16.56 Volt --> 16.56 Volt No Conversion Required
Threshold Voltage: 2 Volt --> 2 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

i_s = i_c/e^(V_be/V_t) --> 0.03952/e^(16.56/2)

Evaluating ... ...

i_s = 1.00197901453726E-05

STEP 3: Convert Result to Output's Unit

1.00197901453726E-05 Ampere -->0.0100197901453726 Milliampere (Check conversion here)

FINAL ANSWER

0.0100197901453726 ≈ 0.01002 Milliampere <-- Saturation Current

(Calculation completed in 00.004 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 600+ more calculators!

Verified by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

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< 10+ Emitter Follower Calculators

Output Resistance of Emitter Follower

Go Finite Resistance = (1/Load Resistance+1/Small Signal Voltage+1/Emitter Resistance)+(1/Base Impedance+1/Signal Resistance)/(Collector Base Current Gain+1)

Collector Current in Active Region when Transistor Acts as Amplifier

Go Collector Current = Saturation Current*e^(Voltage across Base Emitter Junction/Threshold Voltage)

Saturation Current of Emitter Follower

Go Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage)

Input Resistance of Emitter Follower

Go Input Resistance = 1/(1/Signal Resistance in Base+1/Base Resistance)

Base Resistance across Emitter follower Junction

Go Base Resistance = High Frequency Constant*Emitter Resistance

Total Emitter Resistance of Emitter Follower

Go Emitter Resistance = Base Resistance/High Frequency Constant

Output Resistance of Transistor at Intrinsic Gain

Go Finite Output Resistance = Early Voltage/Collector Current

Collector Current of Emitter Follower Transistor

Go Collector Current = Early Voltage/Finite Output Resistance

Input Resistance of Transistor Amplifier

Go Input Resistance = Amplifier Input/Input Current

Input Voltage of Emitter Follower

Go Emitter Voltage = Base Voltage-0.7

< 15 Multi Stage Transistor Amplifiers Calculators

Open Circuit Bipolar Cascode Voltage Gain

Go Bipolar Cascode Voltage Gain = -MOSFET Primary Transconductance*(MOSFET Secondary Transconductance*Finite Output Resistance)*(1/Finite Output Resistance of Transistor 1+1/Small Signal Input Resistance)^-1

Output Resistance of Emitter Follower

Go Finite Resistance = (1/Load Resistance+1/Small Signal Voltage+1/Emitter Resistance)+(1/Base Impedance+1/Signal Resistance)/(Collector Base Current Gain+1)

Drain Resistance of Cascode Amplifier

Go Drain Resistance = (Output Voltage Gain/(MOSFET Primary Transconductance^2*Finite Output Resistance))

Output voltage gain of MOS Cascode Amplifier

Go Output Voltage Gain = -MOSFET Primary Transconductance^2*Finite Output Resistance*Drain Resistance

Collector Current in Active Region when Transistor Acts as Amplifier

Go Collector Current = Saturation Current*e^(Voltage across Base Emitter Junction/Threshold Voltage)

Saturation Current of Emitter Follower

Go Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage)

Equivalent Resistance of Cascode Amplifier

Go Resistance between Drain and Ground = (1/Finite Output Resistance of Transistor 1+1/Input Resistance)^-1

Negative Voltage Gain of Cascode Amplifier

Go Negative Voltage Gain = -(MOSFET Primary Transconductance*Resistance between Drain and Ground)

Input Resistance of Emitter Follower

Go Input Resistance = 1/(1/Signal Resistance in Base+1/Base Resistance)

Base Resistance across Emitter follower Junction

Go Base Resistance = High Frequency Constant*Emitter Resistance

Total Emitter Resistance of Emitter Follower

Go Emitter Resistance = Base Resistance/High Frequency Constant

Output Resistance of Transistor at Intrinsic Gain

Go Finite Output Resistance = Early Voltage/Collector Current

Collector Current of Emitter Follower Transistor

Go Collector Current = Early Voltage/Finite Output Resistance

Input Resistance of Transistor Amplifier

Go Input Resistance = Amplifier Input/Input Current

Input Voltage of Emitter Follower

Go Emitter Voltage = Base Voltage-0.7

Saturation Current of Emitter Follower Formula

Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage)
i_s = i_c/e^(V_be/V_t)

What is meant by emitter follower?

Emitter follower is a case of the negative current feedback circuit. This is mostly used as a last-stage amplifier in signal generator circuits. The important features of Emitter Follower are − It has high input impedance. It has low output impedance.

How to Calculate Saturation Current of Emitter Follower?

Saturation Current of Emitter Follower calculator uses Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage) to calculate the Saturation Current, Saturation Current of Emitter Follower is the maximum current that the circuit can handle without significant distortion. It is defined as the current that results in a voltage drop across the emitters of approximately 1 volt. Saturation Current is denoted by i_s symbol.

How to calculate Saturation Current of Emitter Follower using this online calculator? To use this online calculator for Saturation Current of Emitter Follower, enter Collector Current (i_c), Voltage across Base Emitter Junction (V_be) & Threshold Voltage (V_t) and hit the calculate button. Here is how the Saturation Current of Emitter Follower calculation can be explained with given input values -> 10.01979 = 0.03952/e^(16.56/2).

FAQ

What is Saturation Current of Emitter Follower?

Saturation Current of Emitter Follower is the maximum current that the circuit can handle without significant distortion. It is defined as the current that results in a voltage drop across the emitters of approximately 1 volt and is represented as i_s = i_c/e^(V_be/V_t) or Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage). Collector current is an amplified output current of a bipolar junction transistor, The Voltage across Base Emitter Junction is the forward voltage between the base and emitter of the 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.

How to calculate Saturation Current of Emitter Follower?

Saturation Current of Emitter Follower is the maximum current that the circuit can handle without significant distortion. It is defined as the current that results in a voltage drop across the emitters of approximately 1 volt is calculated using Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage). To calculate Saturation Current of Emitter Follower, you need Collector Current (i_c), Voltage across Base Emitter Junction (V_be) & Threshold Voltage (V_t). With our tool, you need to enter the respective value for Collector Current, Voltage across Base Emitter Junction & Threshold 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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