A Multi-Mode Silicon Neuron Circuit With High Robustness Against PVT

A digital-controlled silicon neuron is presented, which can achieve a multi-mode biologically plausible spike shape. The proposed circuit can mimics the behaviors of known kinds of excitatory and inhibitory cortical neurons, including regular spiking (RS), chattering (CH), intrinsic bursting (IB), fast spiking (FS), and low-threshold spiking (LTS). The circuit is capable of generating different spiking patterns through simple digital control, which makes the circuit configurable for a large-scale spiking neural network (SNN). Implemented in a 65-nm CMOS technology, the proposed circuit maintains a good robustness over process, voltage and temperature (PVT) variations.