Thesis - Department of Electronic & Computer Engineering

5.4 Examples of Pulse Coupled RealizationWithout considering implementation issues, we assume the capacity of the pulsebased communication is infinite, such that all the pulses can be put through.Let us look at the two-neuron model first. To make sure the recurrent strengths arechosen such that the system works at the WTA region, we choose a = b = 0.5 ,θ = 0.4τ , A = 4 and T p= 0.1τ , then we will get a concrete WTA model:τv˙ 1() t = – v 1() t + I 1+ 0.5s 1() t – 0.5s 2() tτv˙ 2() t = – v 2() t + I 2– 0.5s 1() t + 0.5s 2() twhere s 1 () t and s 2 () t follow the definition in section 5.1.With the same input conditions as the example analyzed in Chapter 2, whereI 1= 1.0, δ 1= 0.1 ⇒ I 2= 0.9 and τ = 1ms, according to the previous analysis andsimulation, with continuous model at steady states, we have˜ I 1 1.0= ----------- = --------------- = 2.0, v ˜, .1 – a 1 – 0.52 = 0 t s ≈ 19msv 140