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DC Bias Current of MOSFET Formula

GoDC Bias Current of MOSFET using Overdrive Voltage Formula

GoInput Bias Current Formula

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DC bias current is the constant current that flows through a circuit or device to establish a certain operating point or bias point. Check FAQs

I b = \frac{1}{2} \cdot k n \cdot {(V gs - V th)}^{2}

I_b - DC Bias Current?k_n - Transconductance Parameter?V_gs - Gate-Source Voltage?V_th - Threshold Voltage?

DC Bias Current of MOSFET Example

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Here is how the DC Bias Current of MOSFET equation looks like with Values.

Here is how the DC Bias Current of MOSFET equation looks like with Units.

Here is how the DC Bias Current of MOSFET equation looks like.

15172.5 = \frac{1}{2} \cdot 10.5 \cdot {(4 - 2.3)}^{2}

15172.5mA = \frac{1}{2} \cdot 10.5A/V² \cdot {(4V - 2.3V)}^{2}

15172.5 = \frac{1}{2} \cdot 10.5 \cdot {(4 - 2.3)}^{2}

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DC Bias Current of MOSFET Solution

Follow our step by step solution on how to calculate DC Bias Current of MOSFET?

FIRST Step Consider the formula

I b = \frac{1}{2} \cdot k n \cdot {(V gs - V th)}^{2}

Next Step Substitute values of Variables

∴

I b = \frac{1}{2} \cdot 10.5A/V² \cdot {(4V - 2.3V)}^{2}

Next Step Prepare to Evaluate

∴

I b = \frac{1}{2} \cdot 10.5 \cdot {(4 - 2.3)}^{2}

Next Step Evaluate

∴

I b = 15.1725A

LAST Step Convert to Output's Unit

∴

I b = 15172.5mA

DC Bias Current of MOSFET Formula Elements

Variables

DC Bias Current

DC bias current is the constant current that flows through a circuit or device to establish a certain operating point or bias point.

Symbol: I_b

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find DC Bias 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: k_n

Measurement: Transconductance ParameterUnit: A/V²

Note: Value can be positive or negative.

Formulas to find Transconductance Parameter

Gate-Source Voltage

Gate-source voltage is a critical parameter that affects the operation of an FET, and it is often used to control the device's behavior.

Symbol: V_gs

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Gate-Source Voltage

Threshold Voltage

Threshold voltage, also known as the gate threshold voltage or simply Vth, is a critical parameter in the operation of field-effect transistors, which are fundamental components in modern electronics.

Symbol: V_th

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Threshold Voltage

Other Formulas to find DC Bias Current

Go DC Bias Current of MOSFET using Overdrive Voltage

I b = \frac{1}{2} \cdot k n \cdot {V eff}^{2}

Go Input Bias Current

I b = \frac{I b1 + I b2}{2}

Go Bias Current in Differential Pair

I b = I d1 + I d2

Other formulas in Biasing category

Go DC Bias Output Voltage at Drain

V out = V dd - R L \cdot I b

Go Bias Voltage of MOSFET

V be = V bias + V de

Go Base Current of MOSFET

I base = \frac{V bb - V be}{R b}

Go Collector Emitter Voltage

V ce = V cc - R c \cdot I c

How to Evaluate DC Bias Current of MOSFET?

DC Bias Current of MOSFET evaluator uses DC Bias Current = 1/2*Transconductance Parameter*(Gate-Source Voltage-Threshold Voltage)^2 to evaluate the DC Bias Current, The DC bias current of MOSFET is given by the d.c. drain current and drain-to-source voltage and it is always on the load line. It is also the amount of current that an electronic device needs in DC Biasing condition, where an extra load is added and voltage is given at junctions as per the type of biasing. DC Bias Current is denoted by I_b symbol.

How to evaluate DC Bias Current of MOSFET using this online evaluator? To use this online evaluator for DC Bias Current of MOSFET, enter Transconductance Parameter (k_n), Gate-Source Voltage (V_gs) & Threshold Voltage (V_th) and hit the calculate button.

FAQs on DC Bias Current of MOSFET

What is the formula to find DC Bias Current of MOSFET?

The formula of DC Bias Current of MOSFET is expressed as DC Bias Current = 1/2*Transconductance Parameter*(Gate-Source Voltage-Threshold Voltage)^2. Here is an example- 1.5E+7 = 1/2*10.5*(4-2.3)^2.

How to calculate DC Bias Current of MOSFET?

With Transconductance Parameter (k_n), Gate-Source Voltage (V_gs) & Threshold Voltage (V_th) we can find DC Bias Current of MOSFET using the formula - DC Bias Current = 1/2*Transconductance Parameter*(Gate-Source Voltage-Threshold Voltage)^2.

What are the other ways to Calculate DC Bias Current?

Here are the different ways to Calculate DC Bias Current-

DC Bias Current=1/2*Transconductance Parameter*Effective Voltage^2
DC Bias Current=(Input Bias Current 1+Input Bias Current 2)/2
DC Bias Current=Drain Current 1+Drain Current 2

Can the DC Bias Current of MOSFET be negative?

No, the DC Bias Current of MOSFET, measured in Electric Current cannot be negative.

Which unit is used to measure DC Bias Current of MOSFET?

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

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DC Bias Current of MOSFET Formula

​GoDC Bias Current of MOSFET using Overdrive Voltage Formula

​GoInput Bias Current Formula

DC Bias Current of MOSFET Example

DC Bias Current of MOSFET Solution

DC Bias Current of MOSFET Formula Elements

Other Formulas to find DC Bias Current

Other formulas in Biasing category

How to Evaluate DC Bias Current of MOSFET?

FAQs on DC Bias Current of MOSFET

Variable Name

GoDC Bias Current of MOSFET using Overdrive Voltage Formula

GoInput Bias Current Formula