24BSNR
Junior Member level 2
Has anyone had experience setting up an AC test for differential loop CM stability in fully differential OTAs ? And not using cadence/spectre but a spice variant?
In particular, using switched capacitor CMFB circuitry.
I imagine, one could get away by only looking at the transient behavior. Most papers emphasize importance of AC stability of CMFB loop, but rarely show implementations.
I could also just close the switches and use the full load in a continuous CMFB AC analysis (should be worst case).
Thoughts and especially, evidence are appreciated.
In particular, using switched capacitor CMFB circuitry.
I imagine, one could get away by only looking at the transient behavior. Most papers emphasize importance of AC stability of CMFB loop, but rarely show implementations.
I could also just close the switches and use the full load in a continuous CMFB AC analysis (should be worst case).
Thoughts and especially, evidence are appreciated.
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