I am designing a Gated Ring Oscillator (GRO), To be used in a Time to Digital Converter (TDC).
To get an idea about the performance of the GRO, I would like to perform a phase noise analysis.
I already did some phase noise measurements using PSS and PNOISE from a regular ring oscillator, this work fine.
The challenge with the GRO is that the free running ring oscillator (1.127 GHz) is only enabled for a small period in time, this at a frequency of a the input reference clock (50MHz)
Running the PSS simulation on this circuit always ends up not able to converge. Is there someone that already performed phase noise measurements on a GRO?
