Hi all!

I want to measure the integrated output noise power in a specific frequency range in a Switched Capacitor network; I used pss+timedomain pnoise analysis to get the integrated noise power of the sampled output. Now I want to add a chopper to modulate the flicker noise with the chopping frequency at fs/2 where fs is the rate at which the SC network is varying periodically. Now with this chopping clock added, the network now will be varying at a rate of fs/2 and so time-domain pnoise will give the noise power of output samples, sampled at fs/2 (this is what I am thinking; plz correct me if wrong)  whereas the one required is the noise power of samples, sampled at fs. So how do I get the noise power of output samples sampled at fs?

I was thinking of emulating an impulse sampling instead of a square wave sampling and get the continuous time noise PSD from pnoise. But that would require the switch resistance to be very low which inturn would require a very high maxacfrequency for pss.

Is there a better method of obtaining the noise power?