How to simulate choppered amplifier 's noise

[lordfire]

for reducing flick noise of folded cascode amplifier, choppered with frequency 1Meg, with spectre rf simulation pss + pnoise, the output noise is as fig. a1 below shows , why not like a2 shows, is my simulation setup wrong?

 

[FvM]

Th simulation apparently doesn't consider chopping operation (involved frequency transformation). Any hints, that it's supposed to do?

 

[xiaoyanghqu]

I have the same problem, Can somebody help us! Thanks

Added after 4 hours 55 minutes:

hi, I got it ! I think your pnoise setting is not right!

 

[egaxiola]

What are the right PSS and PNOISE setting then?

 

[Allen0413]

Hi xiaoyanghqu,
Can u show me how to simulate the PSS & Pnoise?
How to setup?
THX

 

[oscarcot]

Please,

can somebody post something? I have the same problem and have no idea how to setup the PNOISE to get such output.

Thanks,
Oscar