Noise Factor(NF) vs Output Noise

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guamak_menanak

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noise factor nf

Is NF is the output noise of our design?? How can we have an analysis on NF by generating a NF waveform?

.print noise onoise(db) ---> is this the syntax for NF??

 

Hi

The noise figure and the output noise are different.
The noise figure is the log form of the noise factor (linear).
The noise factor is: (input signal/input noise)/(output signal/output noise).
If you want the noise figure you have to apply the formula:

NF = -G(dB) + Noise output (dBm/Hz) - Noise input (dBm/Hz)

This is the definition of NF. There are others method to obtain it.

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