Single Photon Avalanche Diode based Vision Sensor with On-Chip Memristive Spiking Neuromorphic Processing

Abstract

In this paper, we present a novel single photon avalanche diode (SPAD) based vision sensor with on-chip memristive spiking neuromorphic processing. For this prototype design, a 5 × 5 SPAD based pixel array with asynchronous address event representation (AER) readout has been implemented in a 65 nm CMOS process. The proposed system also consists of a memristive spiking neuromorphic system to process the events in a more area and power efficient bio-inspired way. The sensor exhibits array-level dynamic range of 152 dB with power consumption of 2.1 mW. The complete event based vision sensing system is tested using a small scale shape recognition task. Results show great potential for the proposed memristive spiking neuromorphic SPAD based vision sensing system for robotic vision used in health, autonomous vehicles, and security applications.