Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Flicker Noise Noise Folding Question

Status
Not open for further replies.

teem

Junior Member level 1
Joined
Nov 17, 2009
Messages
16
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,408
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

Advanced Member level 5
Joined
Feb 22, 2012
Messages
3,842
Helped
916
Reputation
1,830
Reaction score
900
Trophy points
1,393
Location
L.A. USA Zulu -8
Activity points
21,698
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

Advanced Member level 4
Joined
Sep 6, 2001
Messages
1,131
Helped
356
Reputation
710
Reaction score
298
Trophy points
1,363
Location
Argentina
Activity points
8,907
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
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top