Analog CMOS circuit implementation of a system of pulse-coupled oscillators for spike-based computation

In this paper, we propose analog CMOS circuit implementation of a system of coupled phase oscillators with pulse coupling for spiking neural networks. We have designed and fabricated a CMOS circuit that achieves the dynamics of pulse coupled oscillators using TSMC 0.25-μm CMOS technology. In our circuit, oscillator circuits with continuous-time operation interact with each other via a pulse at each firing time. We demonstrate experimentally that the circuit exhibits in- and anti phase as well as out-of-phase synchronization. Such properties are essential for spike-based computation in neuromorphic systems.