Synchrony Detection by Analogue VLSI Neurons with Bimodal STDP Synapses

Part of Advances in Neural Information Processing Systems 16 (NIPS 2003)

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Adria Bofill-i-petit, Alan Murray


We present test results from spike-timing correlation learning ex- periments carried out with silicon neurons with STDP (Spike Tim- ing Dependent Plasticity) synapses. The weight change scheme of the STDP synapses can be set to either weight-independent or weight-dependent mode. We present results that characterise the learning window implemented for both modes of operation. When presented with spike trains with di(cid:11)erent types of synchronisation the neurons develop bimodal weight distributions. We also show that a 2-layered network of silicon spiking neurons with STDP synapses can perform hierarchical synchrony detection.