FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Transconductance in MOSFET Formula

Fx Copy

LaTeX Copy

Transconductance is defined as the ratio of the change in the output current to the change in the input voltage, with the gate-source voltage held constant. Check FAQs

g m = \frac{2 \cdot i d}{V ov}

g_m - Transconductance?i_d - Drain Current?V_ov - Overdrive Voltage?

Transconductance in MOSFET Example

With values

With units

Only example

Here is how the Transconductance in MOSFET equation looks like with Values.

Here is how the Transconductance in MOSFET equation looks like with Units.

Here is how the Transconductance in MOSFET equation looks like.

0.5 = \frac{2 \cdot 0.08}{0.32}

0.5mS = \frac{2 \cdot 0.08mA}{0.32V}

0.5 = \frac{2 \cdot 0.08}{0.32}

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Engineering » Category

Electronics » Category

Analog Electronics » fx Transconductance in MOSFET

Transconductance in MOSFET Solution

Follow our step by step solution on how to calculate Transconductance in MOSFET?

FIRST Step Consider the formula

g m = \frac{2 \cdot i d}{V ov}

Next Step Substitute values of Variables

∴

g m = \frac{2 \cdot 0.08mA}{0.32V}

Next Step Convert Units

∴

g m = \frac{2 \cdot 8E-5A}{0.32V}

Next Step Prepare to Evaluate

∴

g m = \frac{2 \cdot 8E-5}{0.32}

Next Step Evaluate

∴

g m = 0.0005S

LAST Step Convert to Output's Unit

∴

g m = 0.5mS

Transconductance in MOSFET Formula Elements

Variables

Transconductance

Transconductance is defined as the ratio of the change in the output current to the change in the input voltage, with the gate-source voltage held constant.

Symbol: g_m

Measurement: Electric ConductanceUnit: mS

Note: Value can be positive or negative.

Formulas to find Transconductance

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

Overdrive Voltage

Overdrive voltage is a term used in electronics and refers to the voltage level applied to a device or component that exceeds its normal operating voltage.

Symbol: V_ov

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Overdrive Voltage

Other formulas in Transconductance category

Go Maximum Voltage Gain at Bias Point

A vm = 2 \cdot \frac{V dd - V eff}{V eff}

Go Maximum Voltage Gain given all Voltages

A vm = \frac{V dd - 0.3}{V t}

Go Voltage Gain given Drain Voltage

A v = \frac{i d \cdot R L \cdot 2}{V eff}

Go Voltage Gain given Load Resistance of MOSFET

A v = g m \cdot \frac{\frac{1}{\frac{1}{R L} + \frac{1}{R out}}}{1 + g m \cdot R s}

How to Evaluate Transconductance in MOSFET?

Transconductance in MOSFET evaluator uses Transconductance = (2*Drain Current)/Overdrive Voltage to evaluate the Transconductance, Transconductance in MOSFET depends on three parameters (W/L), Veff and Id. Two of which can be chosen independently. Here effective voltage Veff and at a particular current Id is used. The required W/L ratio can then be found and the resulting gm determined. Transconductance is denoted by g_m symbol.

How to evaluate Transconductance in MOSFET using this online evaluator? To use this online evaluator for Transconductance in MOSFET, enter Drain Current (i_d) & Overdrive Voltage (V_ov) and hit the calculate button.

FAQs on Transconductance in MOSFET

What is the formula to find Transconductance in MOSFET?

The formula of Transconductance in MOSFET is expressed as Transconductance = (2*Drain Current)/Overdrive Voltage. Here is an example- 500 = (2*8E-05)/0.32.

How to calculate Transconductance in MOSFET?

With Drain Current (i_d) & Overdrive Voltage (V_ov) we can find Transconductance in MOSFET using the formula - Transconductance = (2*Drain Current)/Overdrive Voltage.

Can the Transconductance in MOSFET be negative?

Yes, the Transconductance in MOSFET, measured in Electric Conductance can be negative.

Which unit is used to measure Transconductance in MOSFET?

Transconductance in MOSFET is usually measured using the Millisiemens[mS] for Electric Conductance. Siemens[mS], Megasiemens[mS], Mho[mS] are the few other units in which Transconductance in MOSFET can be measured.

Let Others Know

✖

Facebook

Twitter

Copied!