Flicker Noise Noise Folding Question

[teem]

Dear Friends:

Flicker noise is infinite at DC. If I pass flicker noise through an on/off switch with switching frequency w, what the output spectrum would be? Would the spectrum be infinite at w, 3*w, 5*w…etc?

Thanks and have a good day.

 

[crutschow]

Switching folds (aliases) the noise above 1/2 the switching frequency, not below.
It will have little effect on the flicker (1/F) noise.

 

[zorro]

Flicker noise is infinite at DC.

Speaking properly, what tends to infinity in the flicker noise model is its power spectral density.

If I pass flicker noise through an on/off switch with switching frequency w, what the output spectrum would be? Would the spectrum be infinite at w, 3*w, 5*w…etc?

It does tend theoretically to infinity, like power spectral density of phase noise tends theoretically to infinity when frequency approaches the carrier frequency.

Z