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. 2015 Mar 2;9:51. doi: 10.3389/fnins.2015.00051

Figure 4.

Figure 4

(A) Example of Memristors and CMOS neuron circuits arrangement for achieving STDP learning: feed-forward neural system with 3 layers of neurons and two fully connecting synapse crossbars. (B) Details of parts around one post-synaptic neuron. While a neuron is silent, it sets a constant DC voltage at its input (Vpost) and output (Vpre) nodes. When a neuron is sending a spike, it sets a voltage spike at both nodes.