Fig. 3: Demonstration of rate-temporal fusion photoencoding.
From: An artificial visual neuron with multiplexed rate and time-to-first-spike coding
a Schematic representations of biological neural coding models, including rate coding (blue line), TTFS coding (purple line), and RTF coding (red line). b Schematic circuit of 1T1R synapses and neurons. The optical pulse and the current waveform were regarded as the input and output signals, respectively. An electric pulse VDD (3 V, 20 μs) was applied to read the spike behaviour with a VG bias of 5 V. c, d Spiking behaviours of the 1T1R device triggered by various UV (c) illumination intensities and (d) optical pulse numbers. e, f The effect of the light intensity on the (e) spike frequency and (f) first spike latency. g, h The effect of the optical pulse number on the (g) spike frequency and (h) first spike latency. i Inhibitory voltage input can modulate the firing rate and the first-spike times.
