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Influence of the spike sharpness on the EIF filter. A, B, Gain (A) and phase (B) of the firing rate modulation are plotted for different values of the spike slope factor ΔT, indicated in A. Other parameters: ν0 = 20 Hz, σ = 6.3 mV. Note that as ΔT decreases, the high frequency asymptotic regime is shifted to higher input frequencies. For large ΔT, the gain decays faster than 1/f, and the phase shift is larger than 90° in an intermediate frequency range.
