Dear loose-electron:
Thanks a lot for the good article in the link. It provides much insight worth to read.
But after reading the article and your comment, I am still confused. Do you mean flicker noise spectral density does go infinity ideally at the mixer(multiplication signal) frequency, but in practical situation it will become sort of equilateral triangle shaped noise profiles? How and why?
Why does it become triangle shaped noise files?
How to calculate the triangle shaped noise profiles?
It seems the article does not mention this part. Could you elaborate or do you have any articles discussing the behavior you explained?
Thanks again.
loose-electron wrote on Jun 5th, 2015, 11:08am:Give this a read:
http://www.edn.com/electronics-blogs/the-signal/4408242/1-f-Noise-the-flickering...The spectral content at (and near) DC does get up converted when you multiply, but the infinite amplitude you mention, in a practical realization situation, is not there.
Generally, when you up convert flicker noise, you will get sort of equilateral triangle shaped noise profiles centered at the mixer (multiplication signal) frequency.