Table 4.

Synapse parameters of the SNN model depicted in (Fig. 1d).

Parameter	Value	Description
τmem	15.2 ms	Time constant of the neuron’s membrane potential. A value of 3.5 pA is set to the bias Iτ to achieve this time constant.
τahp	35.7 ms	Time constant of the neuron’s after-hyperpolarizing potential. A value of 1 pA is set to the bias $I_{{\tau }_{ahp}}$ to achieve this time constant.
τexc	min: 3 ms max: 6 ms	Time constant of the excitatory synapses. This time constant determines the cutoff frequency of the DPIs receiving the UP spikes. To get this these values we set the bias $I_{{\tau }_{exc}}$ in the range 8.9-17.8 pA
τinh	min: 2 ms max: 5.7 ms	Time constant of the inhibitory synapses. This time constant determines the cutoff frequency of the DPI receiving the DN spikes. To get this these values we set the bias $I_{{\tau }_{inh}}$ in the range 9.4-26.8 pA
wexc	1 or 2 nA	With these weight values and the parameters mentioned above, the silicon neurons need a
winh	−1 or −2 nA	minimum of 14 input excitatory spikes at a rate of 3kHz to generate a single spike.