So-termed metastable-hardened flip-flops can be found, which work by minimizing the setup and keep times just as much as possible, but even these are unable to get rid of the challenge completely. It is because metastability is more than merely a make any difference of circuit structure. If the transitions http://sergiozqtus.tinyblogging.com/oem-flip-flops-for-Dummies-40627045