Drain Current of FET Calculator

✖Zero Bias Drain Current in a FET is the drain current that flows when the gate voltage is equal to zero.ⓘ Zero Bias Drain Current [I_dss(fet)]			+10% -10%
✖Drain Source Voltage FET is the voltage between the drain and the source terminal of an FET.ⓘ Drain Source Voltage FET [V_ds(fet)]			+10% -10%
✖Cutt-off Voltage FET 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.ⓘ Cutt-off Voltage FET [V_cut-off(fet)]			+10% -10%

✖Drain Current FET is the current that flow through the drain junction of FET.ⓘ Drain Current of FET [I_d(fet)]

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Formula

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Drain Current of FET

Formula

`"I"_{"d(fet)"} = "I"_{"dss(fet)"}*(1-"V"_{"ds(fet)"}/"V"_{"cut-off(fet)"})^2`

Example

`"0.301384mA"="0.69mA"*(1-"4.8V"/"2.89V")^2`

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Drain Current of FET Solution

STEP 0: Pre-Calculation Summary

Formula Used

Drain Current FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2
I_d(fet) = I_dss(fet)*(1-V_ds(fet)/V_cut-off(fet))^2
This formula uses 4 Variables

Variables Used

Drain Current FET - (Measured in Ampere) - Drain Current FET is the current that flow through the drain junction of FET.
Zero Bias Drain Current - (Measured in Ampere) - Zero Bias Drain Current in a FET is the drain current that flows when the gate voltage is equal to zero.
Drain Source Voltage FET - (Measured in Volt) - Drain Source Voltage FET is the voltage between the drain and the source terminal of an FET.
Cutt-off Voltage FET - (Measured in Volt) - Cutt-off Voltage FET 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

Zero Bias Drain Current: 0.69 Milliampere --> 0.00069 Ampere (Check conversion here)
Drain Source Voltage FET: 4.8 Volt --> 4.8 Volt No Conversion Required
Cutt-off Voltage FET: 2.89 Volt --> 2.89 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_d(fet) = I_dss(fet)*(1-V_ds(fet)/V_cut-off(fet))^2 --> 0.00069*(1-4.8/2.89)^2

Evaluating ... ...

I_d(fet) = 0.000301383963314615

STEP 3: Convert Result to Output's Unit

0.000301383963314615 Ampere -->0.301383963314615 Milliampere (Check conversion here)

FINAL ANSWER

0.301383963314615 ≈ 0.301384 Milliampere <-- Drain Current FET

(Calculation completed in 00.004 seconds)

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< 8 FET Calculators

Ohmic Region Drain Current of FET

Go Drain Current FET = Channel Conductance FET*(Drain Source Voltage FET+3/2*((Surface Potential FET+Drain Source Voltage FET-Drain Source Voltage FET)^(3/2)-(Surface Potential FET+Drain Source Voltage FET)^(3/2))/((Surface Potential FET+Pinch OFF Voltage)^(1/2)))

Transconductance of FET

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

Drain Source Voltage of FET

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

Gate Source Capacitance of FET

Go Gate Source Capacitance FET = Gate Source Capacitance Off Time FET/(1-(Drain Source Voltage FET/Surface Potential FET))^(1/3)

Gate Drain Capacitance of FET

Go Gate Drain Capacitance FET = Gate Drain Capacitance Off Time FET/(1-Gate to Drain Voltage FET/Surface Potential FET)^(1/3)

Drain Current of FET

Go Drain Current FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2

Pinch off Voltage of FET

Go Pinch OFF Voltage = Pinch OFF Drain Source Voltage FET-Drain Source Voltage FET

Voltage Gain of FET

Go Voltage Gain FET = -Forward Transconductance FET*Drain Resistance FET

Drain Current of FET Formula

Drain Current FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2
I_d(fet) = I_dss(fet)*(1-V_ds(fet)/V_cut-off(fet))^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 FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2 to calculate the Drain Current 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. Drain Current FET is denoted by I_d(fet) symbol.

How to calculate Drain Current of FET using this online calculator? To use this online calculator for Drain Current of FET, enter Zero Bias Drain Current (I_dss(fet)), Drain Source Voltage FET (V_ds(fet)) & Cutt-off Voltage FET (V_cut-off(fet)) and hit the calculate button. Here is how the Drain Current of FET calculation can be explained with given input values -> 1E+6 = 0.00069*(1-4.8/2.89)^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(fet) = I_dss(fet)*(1-V_ds(fet)/V_cut-off(fet))^2 or Drain Current FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2. Zero Bias Drain Current in a FET is the drain current that flows when the gate voltage is equal to zero, Drain Source Voltage FET is the voltage between the drain and the source terminal of an FET & Cutt-off Voltage FET 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 FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2. To calculate Drain Current of FET, you need Zero Bias Drain Current (I_dss(fet)), Drain Source Voltage FET (V_ds(fet)) & Cutt-off Voltage FET (V_cut-off(fet)). With our tool, you need to enter the respective value for Zero Bias Drain Current, Drain Source Voltage FET & Cutt-off Voltage FET 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 FET?

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

Drain Current FET = Channel Conductance FET*(Drain Source Voltage FET+3/2*((Surface Potential FET+Drain Source Voltage FET-Drain Source Voltage FET)^(3/2)-(Surface Potential FET+Drain Source Voltage FET)^(3/2))/((Surface Potential FET+Pinch OFF Voltage)^(1/2)))

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