1200x84-pixels 30fps 64cc Solid-State LiDAR RX with an HV/LV transistors Hybrid Active-Quenching-SPAD Array and Background Digital PT Compensation

Abstract

This paper presents two essential techniques, Active-Quenching (AQ) -SPAD consisting of hybrid HV/LV transistors and Digital SPAD Characteristic Compensation (DSCC) circuit to realize high-performance and palm-size LiDAR. The hybrid AQ circuit shrinks a pixel area while ensures a high PDE. The high pixel density 2D-SPAD array realizes high image-resolution palm-size LiDAR by reducing light-receiving lens and RX unit size. The DSCC provides an on-chip Process/Temperature (PT) calibration without external components, which contributes to weatherability assurance and LiDAR miniaturization. These technologies downsize LiDAR RX to the world’s smallest size, 64cc, and realize a total 350cc-size LiDAR with the competitive performance as a mechanical one.