Le Leivre.com

Cascaded Noise Figure Calculator

Calculate the input referred noise figure for cascaded stages.
Enter the Noise Figure and gain for each stage.
Unused stages should be zeroed.


NF (dB)

Gain (dB)

Cascaded NF

Cascaded Gain

*Note. Calculator uses the Friis equation for N Stages.
F = F1 + ((F2-1)/G1)+((F3-1)/G1*G2)+...+ ((FN-1)/G1*G2...*GN)

*Note. The Friis equation requires linear parameters (Noise Factor and gain); the calculator makes the necessary conversions from the dB inputs.