Re: problems about chopper amplifier analysis with pss+pnois
You should look on the results in a different way.
There is no point to look on spectrum above pss nyquist frequency, at least in your case. Since pss frequency is 10kHz, the nyquist is 5kHz. So, your second graph shows the correct noise, except you should limit it by 5kHz. Also, you might want to chose time domain sampling point in pnoise setup panel to ensure the noise is calculated at right time - in case your amplifier noise properties vary in time, not always a case.