Ring oscillator demo

N = 3 4 5 6 10
α = 0.6 0.8 1 1.2 1.4
ω = 1 1.4 1.8 2.2 2.6
d_even = 0.0025 0.005 0.0075 0.01 0.0125
d_odd = 0.0075 0.01 0.0125 0.015 0.0175
β = 0.6 0.8 1 1.2 1.4
σ = 2 3 4 5 6