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Effective Channel Length Formula

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Effective Channel Length is defined as the path that links the charge carriers between the drain and the source. Check FAQs

L eff = L pn - L d

L_eff - Effective Channel Length?L_pn - PN Junction Length?L_d - Depletion Region Width?

Effective Channel Length Example

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With units

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Here is how the Effective Channel Length equation looks like with Values.

Here is how the Effective Channel Length equation looks like with Units.

Here is how the Effective Channel Length equation looks like.

7.99 = 19 - 11.01

7.99mm = 19mm - 11.01mm

7.99 = 19 - 11.01

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Effective Channel Length Solution

Follow our step by step solution on how to calculate Effective Channel Length?

FIRST Step Consider the formula

L eff = L pn - L d

Next Step Substitute values of Variables

∴

L eff = 19mm - 11.01mm

Next Step Convert Units

∴

L eff = 0.019m - 0.011m

Next Step Prepare to Evaluate

∴

L eff = 0.019 - 0.011

Next Step Evaluate

∴

L eff = 0.00799m

LAST Step Convert to Output's Unit

∴

L eff = 7.99mm

Effective Channel Length Formula Elements

Variables

Effective Channel Length

Effective Channel Length is defined as the path that links the charge carriers between the drain and the source.

Symbol: L_eff

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Effective Channel Length

PN Junction Length

PN Junction Length is defined as the total length of the junction from p-side to n-side in a semiconductor.

Symbol: L_pn

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find PN Junction Length

Depletion Region Width

Depletion Region Width in a typical Si diode ranges from a fraction of a micrometer to tens of micrometers depending on device geometry, doping profile, and external bias.

Symbol: L_d

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Depletion Region Width

Other formulas in CMOS Circuit Characteristics category

Go CMOS Critical Voltage

V c = E c \cdot L

Go CMOS Mean Free Path

L = \frac{V c}{E c}

Go Width of Source Diffusion

W = \frac{A s}{D s}

Go Area of Source Diffusion

A s = D s \cdot W

How to Evaluate Effective Channel Length?

Effective Channel Length evaluator uses Effective Channel Length = PN Junction Length-Depletion Region Width to evaluate the Effective Channel Length, The Effective Channel Length formula is defined as is the path that links the charge carriers between the drain and the source. If you exclude the physical overlapping in the structure, gate length and channel length would be very close. Effective Channel Length is denoted by L_eff symbol.

How to evaluate Effective Channel Length using this online evaluator? To use this online evaluator for Effective Channel Length, enter PN Junction Length (L_pn) & Depletion Region Width (L_d) and hit the calculate button.

FAQs on Effective Channel Length

What is the formula to find Effective Channel Length?

The formula of Effective Channel Length is expressed as Effective Channel Length = PN Junction Length-Depletion Region Width. Here is an example- 1.1E+7 = 1.9E-05-1.101E-05.

How to calculate Effective Channel Length?

With PN Junction Length (L_pn) & Depletion Region Width (L_d) we can find Effective Channel Length using the formula - Effective Channel Length = PN Junction Length-Depletion Region Width.

Can the Effective Channel Length be negative?

No, the Effective Channel Length, measured in Length cannot be negative.

Which unit is used to measure Effective Channel Length?

Effective Channel Length is usually measured using the Millimeter[mm] for Length. Meter[mm], Kilometer[mm], Decimeter[mm] are the few other units in which Effective Channel Length can be measured.

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Effective Channel Length Formula

Effective Channel Length Example

Effective Channel Length Solution

Effective Channel Length Formula Elements

Other formulas in CMOS Circuit Characteristics category

How to Evaluate Effective Channel Length?

FAQs on Effective Channel Length

Variable Name