Figure 6
From: Freely scalable and reconfigurable optical hardware for deep learning
Fan-out of one bit from memory (Mem) to multiple processing elements (PEs). (a) Fan-out by electrical wire to a row of PEs in a monolithic chip. (b) DONN equivalent of monolithic chip, where green wire is replaced by optical paths. (c) Fan-out by electrical wire to blocks of PEs divided into chiplets, or separated by memory and logic. (d) DONN equivalent of fan-out to PEs in multiple blocks [energetically equivalent to (b)].
