A Six-Transistor Integrate-and-Fire Neuron Enabling Chaotic Dynamics.

Integrate-and-fire (I&F) neurons used in neuromorphic systems are traditionally optimized for low energy-per-spike and high density, often excluding the complex dynamics of biological neurons. Limited dynamics cause missed opportunities in applications such as modeling time-varying physical systems, where using a small number of neurons with rich nonlinearities can enhance network performance, even when rich neurons incur a marginally higher cost. By adding additional coupling into the gate of one transistor within an I&F neuron, we parsimoniously achieve a highly nonlinear system capable of exhibiting rich dynamics and chaos.