Can anyone help me with this? Thanks.

1. is 'pnoise' the proper analysis to calculate period jitter of a ring oscillator? The manual says that the analysis 'pss' is run ahead of 'pnoise', so I also have difficulty understanding what the periodic steady state within each cycle is for a ring oscillator (the settled high/low state or the threshold crossing state)?

2. If I am interested in the timing delay variations of digital logic circuits (for example a NAND gate) resulting from device noise, like thermal, shot and flicker noise, is 'pnoise' the appropriate analysis?

Thanks, Ken.