Fig. 13
From: Recent Advances on Neuromorphic Systems Using Phase-Change Materials
a The adopted pulse scheme used for the LTD simulation (left) and the LTP simulation (right). b Overlapping of pre-post spikes to simulate STDP behaviour of LTD. c Overlapping of pre-post spikes to simulate STDP behaviour of LTP. d Change in the number of fourfold rings at the end of the sequence for LTD simulation. e Change in the number of fourfold rings at the end of the sequence for LTP simulation. Reprinted with permission from [95]