1. Hi, I had tried to characterize the jitter for driven logic gates (for insance, a simple inverter) due to intrinsic device noise. According to Ken Kundert's paper - An Introduction to Cyclostationary Noise, there are three approaches to do that (on page 38). The first approach needs to determine the instantaneous noise power at the time of threshold crossing time. It is written that "SpectreRF can do this", but I wonder what SpectreRF analysis can do this.

2. On the other hand, I had used 'pnoise' for this purpose, but 'pnoise' gives the time-average of the noise at the output of the circuit in the form of a spectral density versus frequency, according to the reference guide. I was wondering how to convert the resulting noise spectrum to actual time-domain jitter?

Thanks.

Please see the thread starting at http://www.designers-guide.org/Forum/YaBB.pl?num=1224609785. In general (that is without any additional assumptions), it is not possible to calculate jitter from the time-averaged noise.