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Instantaneous Drain Current Formula

GoDrain Current of MOSFET on Large-Signal Operation given Overdrive Voltage Formula

GoDrain Current without Channel-Length Modulation of MOSFET Formula

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Drain current is the current that flows between the drain and the source terminals of a field-effect transistor (FET), which is a type of transistor commonly used in electronic circuits. Check FAQs

i d = K n \cdot {(V gsq - V t + V c)}^{2}

i_d - Drain Current?K_n - Transconductance Parameter?V_gsq - DC Component of Gate to Source Voltage?V_t - Total Voltage?V_c - Critical Voltage?

Instantaneous Drain Current Example

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

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

Here is how the Instantaneous Drain Current equation looks like.

4803.7259 = 0.07 \cdot {(10 - 2 + 0.284)}^{2}

4803.7259mA = 0.07A/V² \cdot {(10V - 2V + 0.284V)}^{2}

4803.7259 = 0.07 \cdot {(10 - 2 + 0.284)}^{2}

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Instantaneous Drain Current Solution

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

FIRST Step Consider the formula

i d = K n \cdot {(V gsq - V t + V c)}^{2}

Next Step Substitute values of Variables

∴

i d = 0.07A/V² \cdot {(10V - 2V + 0.284V)}^{2}

Next Step Prepare to Evaluate

∴

i d = 0.07 \cdot {(10 - 2 + 0.284)}^{2}

Next Step Evaluate

∴

i d = 4.80372592A

Next Step Convert to Output's Unit

∴

i d = 4803.72592mA

LAST Step Rounding Answer

∴

i d = 4803.7259mA

Instantaneous Drain Current Formula Elements

Variables

Drain Current

Drain current is the current that flows between the drain and the source terminals of a field-effect transistor (FET), which is a type of transistor commonly used in electronic circuits.

Symbol: i_d

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Drain Current

Transconductance Parameter

Transconductance parameter Kn is a measure of the change in current flowing through a transistor in response to a small change in voltage.

Symbol: K_n

Measurement: Transconductance ParameterUnit: A/V²

Note: Value should be greater than 0.

Formulas to find Transconductance Parameter

DC Component of Gate to Source Voltage

The DC Component of Gate to Source Voltage refers to the voltage applied between the gate and source terminals, which controls the flow of current between the drain and source terminals.

Symbol: V_gsq

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find DC Component of Gate to Source Voltage

Total Voltage

The total voltage in a series circuit is equal to the sum of all the individual voltage drops in the circuit.

Symbol: V_t

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Total Voltage

Critical Voltage

Critical Voltage is the minimum phase to the neutral voltage which glows and appears all along the line conductor.

Symbol: V_c

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Critical Voltage

Other Formulas to find Drain Current

Go Drain Current of MOSFET on Large-Signal Operation given Overdrive Voltage

i d = (\frac{I b}{V ov}) \cdot (\frac{V id}{2})

Go Drain Current without Channel-Length Modulation of MOSFET

i d = \frac{1}{2} \cdot k' p \cdot WL \cdot {(V gs - V th)}^{2}

Go Drain Current in Load Line

i d = \frac{V dd - V ds}{R L}

Go Instantaneous Drain Current with respect to DC Component of Vgs

i d = K n \cdot ({(V c - V t)}^{2})

Other formulas in Current category

Go First Drain Current of MOSFET on Large-Signal Operation

I d1 = \frac{I b}{2} + \frac{I b}{V ov} \cdot \frac{V id}{2} \cdot \sqrt{1 - \frac{{V id}^{2}}{4 \cdot {V ov}^{2}}}

Go Second Drain Current of MOSFET on Large-Signal Operation

I d2 = \frac{I b}{2} - \frac{I b}{V ov} \cdot \frac{V id}{2} \cdot \sqrt{1 - \frac{{(V id)}^{2}}{4 \cdot {V ov}^{2}}}

Go First Drain Current of MOSFET on Large-Signal Operation given Overdrive Voltage

I d1 = \frac{I b}{2} + \frac{I b}{V ov} \cdot \frac{V id}{2}

Go Second Drain Current of MOSFET on Large-Signal Operation given Overdrive Voltage

I d2 = \frac{I b}{2} - \frac{I b}{V ov} \cdot \frac{V id}{2}

How to Evaluate Instantaneous Drain Current?

Instantaneous Drain Current evaluator uses Drain Current = Transconductance Parameter*(DC Component of Gate to Source Voltage-Total Voltage+Critical Voltage)^2 to evaluate the Drain Current, The Instantaneous Drain Current formula is the maximum current that flows through a semiconductor device in a very short time, typically less than 1 nanosecond. It is an important parameter in the design and analysis of high-speed electronic circuits . Drain Current is denoted by i_d symbol.

How to evaluate Instantaneous Drain Current using this online evaluator? To use this online evaluator for Instantaneous Drain Current, enter Transconductance Parameter (K_n), DC Component of Gate to Source Voltage (V_gsq), Total Voltage (V_t) & Critical Voltage (V_c) and hit the calculate button.

FAQs on Instantaneous Drain Current

What is the formula to find Instantaneous Drain Current?

The formula of Instantaneous Drain Current is expressed as Drain Current = Transconductance Parameter*(DC Component of Gate to Source Voltage-Total Voltage+Critical Voltage)^2. Here is an example- 8.2E+6 = 0.07*(10-2+0.284)^2.

How to calculate Instantaneous Drain Current?

With Transconductance Parameter (K_n), DC Component of Gate to Source Voltage (V_gsq), Total Voltage (V_t) & Critical Voltage (V_c) we can find Instantaneous Drain Current using the formula - Drain Current = Transconductance Parameter*(DC Component of Gate to Source Voltage-Total Voltage+Critical Voltage)^2.

What are the other ways to Calculate Drain Current?

Here are the different ways to Calculate Drain Current-

Drain Current=(DC Bias Current/Overdrive Voltage)*(Differential Input Signal/2)
Drain Current=1/2*Process Transconductance in PMOS*Aspect Ratio*(Gate-Source Voltage-Threshold Voltage)^2
Drain Current=(Supply Voltage-Drain Source Voltage)/Load Resistance

Can the Instantaneous Drain Current be negative?

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

Which unit is used to measure Instantaneous Drain Current?

Instantaneous 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 Instantaneous Drain Current can be measured.

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Instantaneous Drain Current Formula

​GoDrain Current of MOSFET on Large-Signal Operation given Overdrive Voltage Formula

​GoDrain Current without Channel-Length Modulation of MOSFET Formula

Instantaneous Drain Current Example

Instantaneous Drain Current Solution

Instantaneous Drain Current Formula Elements

Other Formulas to find Drain Current

Other formulas in Current category

How to Evaluate Instantaneous Drain Current?

FAQs on Instantaneous Drain Current

Variable Name

GoDrain Current of MOSFET on Large-Signal Operation given Overdrive Voltage Formula

GoDrain Current without Channel-Length Modulation of MOSFET Formula