Fig. 4: On the validation of selector-based LIF neuron.

a Schematic diagram of a biological neuron. b Circuit model of a LIF neuron, the relationship between the I(t) and the u(t) is described by the equation in (b), where urest is the resting membrane potential. c Simulation schematic of a LIF response function, where the relationship between the firing rate and the input current is described by the equation in (c). d Circuit for implementing the selector-based LIF neuron. e Experimental demonstration of the LIF neuron’s firing rate with various input currents (I1 ≈ 1.8 μA, I2 ≈ 2.0 μA and I3 ≈ 2.2 μA).