On Nov 27, 2018, at 8:09 PM, Dave Taht <dave.taht@gmail.com> wrote:

I wish I knew of a mailing list where I could get a definitive answer
on "modern problems with async circuits", or an update on the kind of
techniques the new AI chips were using to keep their power consumption
so low. I'll keep googling.

I’d be interested in knowing this as well. This gives some examples of async circuits: https://web.stanford.edu/class/archive/ee/ee371/ee371.1066/lectures/lect_12.pdf

Page 43, “Bottom Line” mentions that asynchronous design has “some delay matching / overhead issues”. Apparently delay matching means getting the signal outputs on two separate paths to arrive at the same time(?) Presumably overhead refers to the 2x space on the die previously mentioned, for completion detection. Pages 23-25 on “data-bundling constraints” might also highlight some other challenges. Some more current material would be interesting though...