Extended Data Fig. 7: Experimental PCM programming distributions.
From: Equivalent-accuracy accelerated neural-network training using analogue memory
The measured cumulative distribution function of the conductances of 512 × 1,024 devices programmed from full reset state with eight-step set transition rampdown pulse sequences ranging from 1.7 ns to 550 ns in step-size (for example, from 13.6 ns to 4.4 μs in total duration) is shown. Even though the degree of control is worse for high conductances (above 20 μS), to the extent that the monotonicity of the mapping from duration to conductance is disrupted, the vast majority of conductances are programmed to conductances below 20 μS (see Fig. 4 and Extended Data Fig. 9).
