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Noise Factor Formula

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The Noise Factor is defined as the measure of degradation of the signal to noise ratio in a device. Check FAQs

N f = \frac{P si \cdot P no}{P so \cdot P ni}

N_f - Noise Factor?P_si - Signal Power at Input?P_no - Noise Power at Output?P_so - Signal Power at Output?P_ni - Noise Power at Input?

Noise Factor Example

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Here is how the Noise Factor equation looks like with Values.

Here is how the Noise Factor equation looks like with Units.

Here is how the Noise Factor equation looks like.

2.2222 = \frac{25 \cdot 24}{15 \cdot 18}

2.2222 = \frac{25W \cdot 24W}{15W \cdot 18W}

2.2222 = \frac{25 \cdot 24}{15 \cdot 18}

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Noise Factor Solution

Follow our step by step solution on how to calculate Noise Factor?

FIRST Step Consider the formula

N f = \frac{P si \cdot P no}{P so \cdot P ni}

Next Step Substitute values of Variables

∴

N f = \frac{25W \cdot 24W}{15W \cdot 18W}

Next Step Prepare to Evaluate

∴

N f = \frac{25 \cdot 24}{15 \cdot 18}

Next Step Evaluate

∴

N f = 2.22222222222222

LAST Step Rounding Answer

∴

N f = 2.2222

Noise Factor Formula Elements

Variables

Noise Factor

The Noise Factor is defined as the measure of degradation of the signal to noise ratio in a device.

Symbol: N_f

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Noise Factor

Signal Power at Input

Signal Power at Input refers to the amount of energy present in the input signal. It is typically measured in decibels and is a crucial parameter in signal processing and communication systems.

Symbol: P_si

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Signal Power at Input

Noise Power at Output

The Noise Power at Output is defined as spurious contributions from image-frequency transformation.

Symbol: P_no

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Noise Power at Output

Signal Power at Output

Signal Power at Output refers to the amount of energy present in the input signal. It is typically measured in decibels and is a crucial parameter in signal processing and communication systems.

Symbol: P_so

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Signal Power at Output

Noise Power at Input

The Noise Power at Input is defined as the noise originating on the source resistance feeding the receiver.

Symbol: P_ni

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Noise Power at Input

Other formulas in Analog Noise and Power Analysis category

Go Equivalent Noise Temperature

T = (N f - 1) \cdot T o

Go Noise Power at Output of Amplifier

P no = P ni \cdot N f \cdot P ng

Go Noise Power Gain

P ng = \frac{P so}{P si}

Go Power Spectral Density of White Noise

P dw = [BoltZ] \cdot \frac{T}{2}

How to Evaluate Noise Factor?

Noise Factor evaluator uses Noise Factor = (Signal Power at Input*Noise Power at Output)/(Signal Power at Output*Noise Power at Input) to evaluate the Noise Factor, Noise Factor is the measure of degradation of the signal to noise ratio in a device. It is the ratio of the Signal to Noise Ratio at the input to the Signal to Noise Ratio at the output. Noise Factor is denoted by N_f symbol.

How to evaluate Noise Factor using this online evaluator? To use this online evaluator for Noise Factor, enter Signal Power at Input (P_si), Noise Power at Output (P_no), Signal Power at Output (P_so) & Noise Power at Input (P_ni) and hit the calculate button.

FAQs on Noise Factor

What is the formula to find Noise Factor?

The formula of Noise Factor is expressed as Noise Factor = (Signal Power at Input*Noise Power at Output)/(Signal Power at Output*Noise Power at Input). Here is an example- 2.222222 = (25*24)/(15*18).

How to calculate Noise Factor?

With Signal Power at Input (P_si), Noise Power at Output (P_no), Signal Power at Output (P_so) & Noise Power at Input (P_ni) we can find Noise Factor using the formula - Noise Factor = (Signal Power at Input*Noise Power at Output)/(Signal Power at Output*Noise Power at Input).

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Noise Factor Formula

Noise Factor Example

Noise Factor Solution

Noise Factor Formula Elements

Other formulas in Analog Noise and Power Analysis category

How to Evaluate Noise Factor?

FAQs on Noise Factor

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