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Saturation Drain Current Formula

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Diode Saturation current is the diode leakage current density in the absence of light. It is an important parameter which differentiates one diode from another. Check FAQs

I s = 0.5 \cdot g m \cdot (V gs - V th)

I_s - Diode Saturation Current?g_m - Transconductance Parameter?V_gs - Gate Source Voltage?V_th - Threshold Voltage?

Saturation Drain Current Example

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

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

Here is how the Saturation Drain Current equation looks like.

9.9 = 0.5 \cdot 0.036 \cdot (1.25 - 0.7)

9.9mA = 0.5 \cdot 0.036S \cdot (1.25V - 0.7V)

9.9 = 0.5 \cdot 0.036 \cdot (1.25 - 0.7)

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Saturation Drain Current Solution

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

FIRST Step Consider the formula

I s = 0.5 \cdot g m \cdot (V gs - V th)

Next Step Substitute values of Variables

∴

I s = 0.5 \cdot 0.036S \cdot (1.25V - 0.7V)

Next Step Prepare to Evaluate

∴

I s = 0.5 \cdot 0.036 \cdot (1.25 - 0.7)

Next Step Evaluate

∴

I s = 0.0099A

LAST Step Convert to Output's Unit

∴

I s = 9.9mA

Saturation Drain Current Formula Elements

Variables

Diode Saturation Current

Diode Saturation current is the diode leakage current density in the absence of light. It is an important parameter which differentiates one diode from another.

Symbol: I_s

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Diode Saturation Current

Transconductance Parameter

Transconductance parameter is a crucial parameter in electronic devices and circuits, which helps to describe and quantify the input-output relationship between voltage and current.

Symbol: g_m

Measurement: Electric ConductanceUnit: S

Note: Value can be positive or negative.

Formulas to find Transconductance Parameter

Gate Source Voltage

Gate Source Voltage of a transistor is the voltage that falls across the gate-source terminal of the transistor.

Symbol: V_gs

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Gate Source Voltage

Threshold Voltage

Threshold Voltage of transistor is minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals.

Symbol: V_th

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Threshold Voltage

Other formulas in Diode Characteristics category

Go Voltage Equivalent of Temperature

V temp = \frac{T room}{11600}

Go Responsivity

R = \frac{I p}{P o}

Go Zener Current

I z = \frac{V i - V z}{R z}

Go Zener Voltage

V z = R z \cdot I z

How to Evaluate Saturation Drain Current?

Saturation Drain Current evaluator uses Diode Saturation Current = 0.5*Transconductance Parameter*(Gate Source Voltage-Threshold Voltage) to evaluate the Diode Saturation Current, Saturation Drain Current controls the flow of current by the application of a voltage to the gate, which in turn alters the conductivity between the drain and source. Diode Saturation Current is denoted by I_s symbol.

How to evaluate Saturation Drain Current using this online evaluator? To use this online evaluator for Saturation Drain Current, enter Transconductance Parameter (g_m), Gate Source Voltage (V_gs) & Threshold Voltage (V_th) and hit the calculate button.

FAQs on Saturation Drain Current

What is the formula to find Saturation Drain Current?

The formula of Saturation Drain Current is expressed as Diode Saturation Current = 0.5*Transconductance Parameter*(Gate Source Voltage-Threshold Voltage). Here is an example- 9900 = 0.5*0.036*(1.25-0.7).

How to calculate Saturation Drain Current?

With Transconductance Parameter (g_m), Gate Source Voltage (V_gs) & Threshold Voltage (V_th) we can find Saturation Drain Current using the formula - Diode Saturation Current = 0.5*Transconductance Parameter*(Gate Source Voltage-Threshold Voltage).

Can the Saturation Drain Current be negative?

Yes, the Saturation Drain Current, measured in Electric Current can be negative.

Which unit is used to measure Saturation Drain Current?

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

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