This paper studies the synchronization in cellular neural networks (CNNs). For the individual oscillator, the following differential delay system is taken
\[ \dot x(t)=0.001x(t)-3.8(| x_\tau +1 |-|x_\tau-1|)+ 2.85\left(\left| x_\tau+\frac{4}{3}\right| - \left| x_\tau-\frac{4}{3}\right| \right), \]
where \(x_\tau=x(t-\tau)\). Further, the authors numerically investigate different coupling combinations of five coupled oscillators with non delayed coupling. For different coupling configurations the synchronization threshold has been found, i.e. the strength of the coupling, which leads to identical synchronization of all oscillators with \(|x_i(t)-x_j(t)| \to 0\) as \(t\to\infty\) for all \(1\leq i,j\leq 5\).