Hi all,
I am designing a doubler with an input buffer. the Doubler itself is running with a bias near cut-off and using a push-push structure, while the input buffer is a simple CS structure. When I check stability, I often use the S probe in cadence environment, and the SP probe in ADS. However, as far as I am aware, these probes only work for sp analysis, which is small signal. However, my circuit's S parameters will change once the input signal is entered because of the class B style biasing of the doubler, so I would need to check stability in the large signal condition, and I was wondering how this could be done in both Cadence Virtuoso and ADS.
Thanks