Need Comment from Designer: Why Flicker Noise is Critical?

[waiheng318]

Hi All:

Why flicker noise is so concern by the designer even though the main signal level is far far above the flicker noise or 1/f noise level?

What kind of circuit that is sensitive to the 1/f noise? Analog, digital, RF?

Please comment, thanks.

 

[EEsj]

Re: Need Comment from Designer: Why Flicker Noise is Critica

1/f noise is very critical in RF or Analog circuits since the with large swing behavior the MOS is experiencing nonlinear gain beahavior... therefore even though 1/f noise seems to dissapear at higher frequencies...this low freq noise can experience frequency translation and modulate itself onto the RF or analog signal...

 

[drabos]

also important in mixers

for the question analog, rf or digital... analog and RF, a CMOS digital circuit is pretty much noise sensitive, and flicker noise is not an issue at all in that topic