The refresh redistributes the charge between the gates back to the original state - the dynamic leakage mechanism between the gates does not deplete the total charge on the gate pair, so total charge does not need to be "replenished".
Great, we finally see the details, but not enough nit and grit. For example, the refresh must depend on how much charge is on the bottom floating gate. And programming the top floating gate must pull some charge off the bottom floating gate as well, which must be replenished.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.