Figure 2.

Temporal profile of the phasic function Φ_{τ, k}(x) defined by Equation (5). At t = 0, the Heaviside input x(t) goes from 0 to 1. The temporal profile of five phasic functions Φ_{τ, k}(x) with τ = 50 ms and k ranging from 0 to 1 is displayed. If k = 0, the phasifunction is a simple leaky integrator with time constant τ. If k = 1, the output of the filter is a localized bump peaking at t = τ and converging toward 0.