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. 2016 May 23;10:212. doi: 10.3389/fnins.2016.00212

Figure 4.

Figure 4

Spiking characteristics in dc input mode. (A) FGLIF neuron circuit (identical to Figure 1). (B) Input dc voltage Vin (upper panel) and resulting VFG evolution (bottom panel). (C) Responses of Vamp_in and Vamp_out to Vin, which correspond to the input and output of Amp1, respectively. The gray dashed line denotes the threshold of Amp2. The increase in Vamp_out owing to positive feedback through C1 is indicated. (D) Output spikes (tsp = 25 μs, aout = 23 Hz). (E) Neuronal gain function for three different Vg2 values (0.6, 0.65, and 0.7 V).