Noise Figure Calculator

✖Maximum Possible S/N Ratio is defined as a measure used in science and engineering that compares the level of the desired signal to the level of background noise.ⓘ Maximum Possible S/N Ratio [SN_m]			+10% -10%
✖Actual S/N ratio at Output can be calculated tf your signal and noise measurements are already in dB form, simply subtract the noise figure from the main signal.ⓘ Actual S/N Ratio at Output [SN_out]			+10% -10%

✖Noise Figure of Amplifier is a parameter that quantifies how much additional noise the amplifier adds to the signal passing through it.ⓘ Noise Figure [F]

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Noise Figure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Noise Figure of Amplifier = Maximum Possible S/N Ratio/Actual S/N Ratio at Output
F = SN_m/SN_out
This formula uses 3 Variables

Variables Used

Noise Figure of Amplifier - (Measured in Decibel) - Noise Figure of Amplifier is a parameter that quantifies how much additional noise the amplifier adds to the signal passing through it.
Maximum Possible S/N Ratio - (Measured in Decibel) - Maximum Possible S/N Ratio is defined as a measure used in science and engineering that compares the level of the desired signal to the level of background noise.
Actual S/N Ratio at Output - (Measured in Decibel) - Actual S/N ratio at Output can be calculated tf your signal and noise measurements are already in dB form, simply subtract the noise figure from the main signal.

STEP 1: Convert Input(s) to Base Unit

Maximum Possible S/N Ratio: 390 Decibel --> 390 Decibel No Conversion Required
Actual S/N Ratio at Output: 30 Decibel --> 30 Decibel No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

F = SN_m/SN_out --> 390/30

Evaluating ... ...

F = 13

STEP 3: Convert Result to Output's Unit

13 Decibel --> No Conversion Required

FINAL ANSWER

13 Decibel <-- Noise Figure of Amplifier

(Calculation completed in 00.006 seconds)

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Credits

Created by Shobhit Dimri

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat

Shobhit Dimri has created this Calculator and 900+ more calculators!

Verified by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

Urvi Rathod has verified this Calculator and 1900+ more calculators!

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Noise Figure Formula

LaTeX Go

Noise Figure of Amplifier = Maximum Possible S/N Ratio/Actual S/N Ratio at Output
F = SN_m/SN_out

What is use of noise figure?

The noise figure is the difference in decibels (dB) between the noise output of the actual receiver to the noise output of an “ideal” receiver with the same overall gain and bandwidth when the receivers are connected to matched sources at the standard noise temperature T0 (usually 290 K). This makes the noise figure a useful figure of merit for terrestrial systems, where the antenna effective temperature is usually near the standard 290 K.

How to Calculate Noise Figure?

Noise Figure calculator uses Noise Figure of Amplifier = Maximum Possible S/N Ratio/Actual S/N Ratio at Output to calculate the Noise Figure of Amplifier, The Noise Figure formula is defined as the noise figure is the difference in decibels (dB) between the noise output of the actual receiver to the noise output of an “ideal” receiver with the same overall gain and bandwidth when the receivers are connected to matched sources at the standard noise temperature. Noise Figure of Amplifier is denoted by F symbol.

How to calculate Noise Figure using this online calculator? To use this online calculator for Noise Figure, enter Maximum Possible S/N Ratio (SN_m) & Actual S/N Ratio at Output (SN_out) and hit the calculate button. Here is how the Noise Figure calculation can be explained with given input values -> 13 = 390/30.

FAQ

What is Noise Figure?

The Noise Figure formula is defined as the noise figure is the difference in decibels (dB) between the noise output of the actual receiver to the noise output of an “ideal” receiver with the same overall gain and bandwidth when the receivers are connected to matched sources at the standard noise temperature and is represented as F = SN_m/SN_out or Noise Figure of Amplifier = Maximum Possible S/N Ratio/Actual S/N Ratio at Output. Maximum Possible S/N Ratio is defined as a measure used in science and engineering that compares the level of the desired signal to the level of background noise & Actual S/N ratio at Output can be calculated tf your signal and noise measurements are already in dB form, simply subtract the noise figure from the main signal.

How to calculate Noise Figure?

The Noise Figure formula is defined as the noise figure is the difference in decibels (dB) between the noise output of the actual receiver to the noise output of an “ideal” receiver with the same overall gain and bandwidth when the receivers are connected to matched sources at the standard noise temperature is calculated using Noise Figure of Amplifier = Maximum Possible S/N Ratio/Actual S/N Ratio at Output. To calculate Noise Figure, you need Maximum Possible S/N Ratio (SN_m) & Actual S/N Ratio at Output (SN_out). With our tool, you need to enter the respective value for Maximum Possible S/N Ratio & Actual S/N Ratio at Output and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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