Dear huber:
Thank you for your suggestion.
I have read the paper "Simulating switched-capacitor filters with SpectreRF".
But I still have some questions.
My comparator is just a cascade of differencing amplifiers
with output-offset-storage in the first stage and input-offset-storage in the second.
The questions:
1.in the pnoise analysis,which net(or nets) should I treat as output nodes?
If I choose the inverter output, it is already a digital out,
and the amplitude noise is compressed.
2. in Ken's another paper "Noise in mixers, oscillators, samplers, and logic: an
introduction to cyclostationary noise". There is a mention that if the output of one stage caused
the subsequent stage to behave nonlinearity, the “noisetype=correlations” should be chosen.
Should I do that?
Thanks again for your kindly response
Any response is appreciated.
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regards
Shano