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Drain Current of FET Formula

GoOhmic Region Drain Current of FET Formula

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Drain Current FET is the current that flow through the drain junction of FET. Check FAQs

I d(fet) = I dss(fet) \cdot {(1 - \frac{V ds(fet)}{V cut-off(fet)})}^{2}

I_d(fet) - Drain Current FET?I_dss(fet) - Zero Bias Drain Current?V_ds(fet) - Drain Source Voltage FET?V_cut-off(fet) - Cutt-off Voltage FET?

Drain Current of FET Example

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With units

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Here is how the Drain Current of FET equation looks like with Values.

Here is how the Drain Current of FET equation looks like with Units.

Here is how the Drain Current of FET equation looks like.

0.3014 = 0.69 \cdot {(1 - \frac{4.8}{2.89})}^{2}

0.3014mA = 0.69mA \cdot {(1 - \frac{4.8V}{2.89V})}^{2}

0.3014 = 0.69 \cdot {(1 - \frac{4.8}{2.89})}^{2}

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Drain Current of FET Solution

Follow our step by step solution on how to calculate Drain Current of FET?

FIRST Step Consider the formula

I d(fet) = I dss(fet) \cdot {(1 - \frac{V ds(fet)}{V cut-off(fet)})}^{2}

Next Step Substitute values of Variables

∴

I d(fet) = 0.69mA \cdot {(1 - \frac{4.8V}{2.89V})}^{2}

Next Step Convert Units

∴

I d(fet) = 0.0007A \cdot {(1 - \frac{4.8V}{2.89V})}^{2}

Next Step Prepare to Evaluate

∴

I d(fet) = 0.0007 \cdot {(1 - \frac{4.8}{2.89})}^{2}

Next Step Evaluate

∴

I d(fet) = 0.000301383963314615A

Next Step Convert to Output's Unit

∴

I d(fet) = 0.301383963314615mA

LAST Step Rounding Answer

∴

I d(fet) = 0.3014mA

Drain Current of FET Formula Elements

Variables

Drain Current FET

Drain Current FET is the current that flow through the drain junction of FET.

Symbol: I_d(fet)

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Drain Current FET

Zero Bias Drain Current

Zero Bias Drain Current in a FET is the drain current that flows when the gate voltage is equal to zero.

Symbol: I_dss(fet)

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Zero Bias Drain Current

Drain Source Voltage FET

Drain Source Voltage FET is the voltage between the drain and the source terminal of an FET.

Symbol: V_ds(fet)

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Drain Source Voltage FET

Cutt-off Voltage 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.

Symbol: V_cut-off(fet)

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Cutt-off Voltage FET

Other Formulas to find Drain Current FET

Go Ohmic Region Drain Current of FET

I d(fet) = G o(fet) \cdot (V ds(fet) + \frac{3}{2} \cdot \frac{{(Ψ 0(fet) + V ds(fet) - V ds(fet))}^{\frac{3}{2}} - {(Ψ 0(fet) + V ds(fet))}^{\frac{3}{2}}}{{(Ψ 0(fet) + V off(fet))}^{\frac{1}{2}}})

Other formulas in FET category

Go Pinch off Voltage of FET

V off(fet) = V ds-off(fet) - V ds(fet)

Go Transconductance of FET

G m(fet) = \frac{2 \cdot I dss(fet)}{V off(fet)} \cdot (1 - \frac{V ds(fet)}{V off(fet)})

Go Drain Source Voltage of FET

V ds(fet) = V dd(fet) - I d(fet) \cdot (R d(fet) + R s(fet))

Go Voltage Gain of FET

A v(fet) = - G m(fet) \cdot R d(fet)

How to Evaluate Drain Current of FET?

Drain Current of FET evaluator uses Drain Current FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2 to evaluate 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 evaluate Drain Current of FET using this online evaluator? To use this online evaluator 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.

FAQs on Drain Current of FET

What is the formula to find Drain Current of FET?

The formula of Drain Current of FET is expressed as Drain Current FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2. Here is an example- 1E+6 = 0.00069*(1-4.8/2.89)^2.

How to calculate Drain Current of FET?

With Zero Bias Drain Current (I_dss(fet)), Drain Source Voltage FET (V_ds(fet)) & Cutt-off Voltage FET (V_cut-off(fet)) we can find Drain Current of FET using the formula - Drain Current FET = Zero Bias Drain Current*(1-Drain Source Voltage FET/Cutt-off Voltage FET)^2.

What are the other ways to Calculate Drain Current FET?

Here are the different ways to Calculate Drain Current FET-

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)))

Can the Drain Current of FET be negative?

No, the Drain Current of FET, measured in Electric Current cannot be negative.

Which unit is used to measure Drain Current of FET?

Drain Current of FET is usually measured using the Milliampere[mA] for Electric Current. Ampere[mA], Microampere[mA], Centiampere[mA] are the few other units in which Drain Current of FET can be measured.

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Drain Current of FET Formula

​GoOhmic Region Drain Current of FET Formula

Drain Current of FET Example

Drain Current of FET Solution

Drain Current of FET Formula Elements

Other Formulas to find Drain Current FET

Other formulas in FET category

How to Evaluate Drain Current of FET?

FAQs on Drain Current of FET

Variable Name

GoOhmic Region Drain Current of FET Formula