A 160×120 Flash LiDAR Sensor with Fully Analog-Assisted InPixel Histogramming TDC Based on Self-Referenced SAR ADC

📋 论文概要

该论文提出了一种160×120像素的闪光LiDAR传感器，采用全模拟辅助的像素内直方图时间数字转换器（TDC），基于自参考SAR ADC实现，旨在解决移动设备中实时深度感知的高精度和低功耗问题。

💡 主要创新点

• 提出了一种基于自参考SAR ADC的像素内直方图TDC，实现了全模拟辅助的时间测量，降低了功耗和面积。
• 采用闪光LiDAR架构，所有像素同时工作，适用于20-30米范围内的3D映射，简化了光学系统。
• 通过模拟直方图处理，减少了数字电路复杂度，提高了深度分辨率和抗噪声能力。

🏷 关键词

📄 原文摘要

surrounding objects plays a crucial role in realizing the metaverse and spatial computing on mobile devices. A LiDAR sensor based on direct time-of-flight (dToF) technology is one of the strong candidates to provide depth information in real time, and its development efforts have recently surged. Flash LiDAR systems are suitable for 3-D mapping within 20-to-30m ranges because all pixels simultaneously operate with diffused infrared light in a global-shutter manner, achieving cost-effective solutions with simple optical equipment [1]. However, a largesize in-pixel histogramming time-to-digital converter (hTDC) is inevitable to support the time-correlated single-photon counting method for acquiring a reliable depth map, still

👥 作者与机构

Su-Hyun Han1, Seonghyeok Park1, Jung-Hoon Chun2,3, Jaehyuk Choi2,3, Seong-Jin Kim1

Ulsan National Institute of Science and Technology, Ulsan, Korea Sungkyunkwan University, Suwon, Korea 3 SolidVue, Seongnam, Korea 1 2 Three-dimensional (3-D) mapping for recognizing