A common belief is that "analog doesn't scale." But analog/mixed-signal design can indeed work at advanced process nodes. An inside look into how, and what the challenges are, comes from a recent partnership between GLOBALFOUNDRIES and Cadence that produced a 28nm analog/mixed-signal design flow development kit.
My take from this experience is that analog/mixed-signal at 28nm is challenging but not prohibitive. Yes, leakage and parasitics can be more problematic, and analog blocks won't shrink as much as digital blocks, but there are no big roadblocks that make analog/mixed-signal design at this node unfeasible. And now, thanks to the above-mentioned partnership, we have a reference flow that shows just how it can be done, using GLOBALFOUNDRIES "gate first" high-k metal gates (HKMG) 28nm technology.
Why put this flow together?
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