传感技术学报2025，Vol.38Issue(9)：1547-1558,12.DOI:10.3969/j.issn.1004-1699.2025.09.003
一种应用于SPAD面阵型激光雷达传感器的基于八元搜索和4-tap相位检测的直方图TDC
An in-Pixel Histogramming TDC Based on Octonary Search and 4-Tap Phase Detection for SPAD-Based Flash LiDAR Sensor
摘要
Abstract
An in-pixel histogramming time-to-digital converter(hTDC)based on octonary search and 4-tap phase detection is presented,aiming to improve frame rate while ensuring high precicion.The proposed hTDC is a 12-bit two-step converter consisting of a 6-bit coarse quantization and a 6-bit fine quantization,which supports a time resolution of 120 ps and multiphoton counting up to 2 GHz with-out a GHz reference frequency.The proposed hTDC is designed in 0.11 μm CMOS process with an area consumption of 6 900 μm2.The data from a behavioral-level model is imported into the designed hTDC circuit for simulation verification.The post-simulation results show that the proposed hTDC achieves 0.8%depth precision in 9 m range for short-range system design specifications and 0.2%depth precision in 48 m range for long-range system design specifications.Under 30×103 lux background light conditions,the proposed hTDC can be used for SPAD-based flash LiDAR sensor to achieve a frame rate to 40 fps with 200 ps resolution in 9 m range.关键词
激光雷达传感器/直方图时间数字转换器/混合飞行时间/八元搜索/4-tap相位检测Key words
LiDAR sensor/histogramming time-to-digital converter/hybrid time of flight/octonary search/4-tap phase detection分类
信息技术与安全科学引用本文复制引用
贺文杰,聂凯明,吴浩然..一种应用于SPAD面阵型激光雷达传感器的基于八元搜索和4-tap相位检测的直方图TDC[J].传感技术学报,2025,38(9):1547-1558,12.基金项目
National Key Research and Development Program of China(2022YFB2804401) （2022YFB2804401）
