Experimental code.

PSS is a radio frequency periodical large-signal dedicated analysis. The implementation is based on a time domain shooting method that make use of transient analysis. As it is in early development stage, PSS performs analysis only on autonomous circuits, meaning that it is able to predict fundamental frequency and (harmonic) amplitude(s) for oscillators, VCOs, etc.. The algorithm is based on a search of the minimum error vector defined as the difference of RHS vectors between two occurrences of an estimated period. Convergence is reached when the mean of this error vector decreases below a given threshold parameter. Results of PSS are the basis of periodical large-signal analyses like PAC or PNoise.