Drain Current of FET Calculator

✖Drain Current of Zero Bias in an FET is the drain current that flows when the gate voltage is equal to zero.ⓘ Drain Current of Zero Bias [I_dss]			+10% -10%
✖Gain to Source Voltage of a JFET is the ratio of the change in drain voltage to the change in source voltage.ⓘ Gain to Source Voltage [V_(g-s)]			+10% -10%
✖Cuttoff Gain to Source Voltage is a term used to describe the voltage gain of a field-effect transistor (FET) when the gate-to-source voltage is equal to the pinch-off voltage.ⓘ Cuttoff Gain to Source Voltage [V_gs(off)]			+10% -10%

✖Drain Current is the current that flow through the drain junction of the MOSFET and IGBT.ⓘ Drain Current of FET [I_d]

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Formula

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Drain Current of FET

Formula

`"I"_{"d"} = "I"_{"dss"}*(1-"V"_{"(g-s)"}/"V"_{"gs(off)"})^2`

Example

`"0.899113A"="0.96A"*(1-"0.0039V"/"0.121V")^2`

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Drain Current of FET Solution

STEP 0: Pre-Calculation Summary

Formula Used

Drain Current = Drain Current of Zero Bias*(1-Gain to Source Voltage/Cuttoff Gain to Source Voltage)^2
I_d = I_dss*(1-V_(g-s)/V_gs(off))^2
This formula uses 4 Variables

Variables Used

Drain Current - (Measured in Ampere) - Drain Current is the current that flow through the drain junction of the MOSFET and IGBT.
Drain Current of Zero Bias - (Measured in Ampere) - Drain Current of Zero Bias in an FET is the drain current that flows when the gate voltage is equal to zero.
Gain to Source Voltage - (Measured in Volt) - Gain to Source Voltage of a JFET is the ratio of the change in drain voltage to the change in source voltage.
Cuttoff Gain to Source Voltage - (Measured in Volt) - Cuttoff Gain to Source Voltage is a term used to describe the voltage gain of a field-effect transistor (FET) when the gate-to-source voltage is equal to the pinch-off voltage.

STEP 1: Convert Input(s) to Base Unit

Drain Current of Zero Bias: 0.96 Ampere --> 0.96 Ampere No Conversion Required
Gain to Source Voltage: 0.0039 Volt --> 0.0039 Volt No Conversion Required
Cuttoff Gain to Source Voltage: 0.121 Volt --> 0.121 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_d = I_dss*(1-V_(g-s)/V_gs(off))^2 --> 0.96*(1-0.0039/0.121)^2

Evaluating ... ...

I_d = 0.899113011406325

STEP 3: Convert Result to Output's Unit

0.899113011406325 Ampere --> No Conversion Required

FINAL ANSWER

0.899113011406325 ≈ 0.899113 Ampere <-- Drain Current

(Calculation completed in 00.004 seconds)

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Created by Mohamed Fazil V

Acharya institute of technology (AIT), Bengaluru

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< 9 FET Calculators

Ohmic Region Drain Current of FET

Go Drain Current = Channel Conductance*(Drain to Source Voltage+3/2*((Psi+Gain to Source Voltage-Drain to Source Voltage)^(3/2)-(Psi+Gain to Source Voltage)^(3/2))/((Psi+Pinch OFF Voltage)^(1/2)))

Transconductance of FET

Go Forward Transconductance = (2*Drain Current of Zero Bias)/Pinch OFF Voltage*(1-Gain to Source Voltage/Pinch OFF Voltage)

Drain Source Voltage of FET

Go Drain to Source Voltage = Supply Voltage at Drain-Drain Current*(Drain Resistance+Source Resistance)

Gate Substrate Capacitance of FET

Go Gate Substrate Capacitance = Gate Substrate Capacitance off Time/(1-(Gate Substrate Voltage/Psi))^(1/2)

Drain Current of FET

Go Drain Current = Drain Current of Zero Bias*(1-Gain to Source Voltage/Cuttoff Gain to Source Voltage)^2

Gate Source Capacitance of FET

Go Gate to Source Capacitance = Gate Source Capacitance off Time/(1-(Gain to Source Voltage/Psi))^(1/3)

Gate Drain Capacitance of FET

Go Gate to Drain Capacitance = Gate Drain Capacitance off Time/(1-Gate to Drain Voltage/Psi)^(1/3)

Pinch off Voltage of FET

Go Pinch OFF Voltage = Pinch OFF Drain to Source Voltage-Gain to Source Voltage

Voltage Gain of FET

Go Voltage Gain = -Forward Transconductance*Drain Resistance

Drain Current of FET Formula

Drain Current = Drain Current of Zero Bias*(1-Gain to Source Voltage/Cuttoff Gain to Source Voltage)^2
I_d = I_dss*(1-V_(g-s)/V_gs(off))^2

What is Drain Current of FET ?

The drain current of a Field-Effect Transistor (FET) is the current that flows between the drain and source terminals of the transistor when it is operating. The drain current is a fundamental parameter that characterizes the transistor's operation and is a key factor in determining its functionality and application in electronic circuits.

How to Calculate Drain Current of FET?

Drain Current of FET calculator uses Drain Current = Drain Current of Zero Bias*(1-Gain to Source Voltage/Cuttoff Gain to Source Voltage)^2 to calculate the Drain Current, Drain Current of FET in a Field-Effect Transistor (FET) is the current that flows between the drain and source terminals of the transistor. The drain current is a fundamental parameter that characterizes the transistor's operation and is controlled by the gate-source voltage and other device parameters. Drain Current is denoted by I_d symbol.

How to calculate Drain Current of FET using this online calculator? To use this online calculator for Drain Current of FET, enter Drain Current of Zero Bias (I_dss), Gain to Source Voltage (V_(g-s)) & Cuttoff Gain to Source Voltage (V_gs(off)) and hit the calculate button. Here is how the Drain Current of FET calculation can be explained with given input values -> 0.823971 = 0.96*(1-0.0039/0.121)^2.

FAQ

What is Drain Current of FET?

Drain Current of FET in a Field-Effect Transistor (FET) is the current that flows between the drain and source terminals of the transistor. The drain current is a fundamental parameter that characterizes the transistor's operation and is controlled by the gate-source voltage and other device parameters and is represented as I_d = I_dss*(1-V_(g-s)/V_gs(off))^2 or Drain Current = Drain Current of Zero Bias*(1-Gain to Source Voltage/Cuttoff Gain to Source Voltage)^2. Drain Current of Zero Bias in an FET is the drain current that flows when the gate voltage is equal to zero, Gain to Source Voltage of a JFET is the ratio of the change in drain voltage to the change in source voltage & Cuttoff Gain to Source Voltage is a term used to describe the voltage gain of a field-effect transistor (FET) when the gate-to-source voltage is equal to the pinch-off voltage.

How to calculate Drain Current of FET?

Drain Current of FET in a Field-Effect Transistor (FET) is the current that flows between the drain and source terminals of the transistor. The drain current is a fundamental parameter that characterizes the transistor's operation and is controlled by the gate-source voltage and other device parameters is calculated using Drain Current = Drain Current of Zero Bias*(1-Gain to Source Voltage/Cuttoff Gain to Source Voltage)^2. To calculate Drain Current of FET, you need Drain Current of Zero Bias (I_dss), Gain to Source Voltage (V_(g-s)) & Cuttoff Gain to Source Voltage (V_gs(off)). With our tool, you need to enter the respective value for Drain Current of Zero Bias, Gain to Source Voltage & Cuttoff Gain to Source Voltage and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Drain Current?

In this formula, Drain Current uses Drain Current of Zero Bias, Gain to Source Voltage & Cuttoff Gain to Source Voltage. We can use 1 other way(s) to calculate the same, which is/are as follows -

Drain Current = Channel Conductance*(Drain to Source Voltage+3/2*((Psi+Gain to Source Voltage-Drain to Source Voltage)^(3/2)-(Psi+Gain to Source Voltage)^(3/2))/((Psi+Pinch OFF Voltage)^(1/2)))

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