A depth sensor with equivalent time sampling

IF 40.9 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

Nature Electronics Pub Date : 2025-07-22 DOI:10.1038/s41928-025-01427-w

Matthew Parker

引用次数: 0

Abstract

The sensor consists of an upper chip containing a 105 × 1,572 array of single-photon avalanche diodes and a lower chip containing the pixel readout circuit. The output of this circuit is sampled using multiple clocks with different phases, a process called equivalent time sampling, which improves the measurement accuracy without increasing the amount of data. The sampled data are used to create a histogram from which depth information can be extracted using an on-chip echo analysis circuit that reduces the final data size by up to 98%.

With this aggressive reduction in output data, and by processing distance information on the chip, a sampling rate of 25 million points per second can be achieved. The LiDAR system exhibits a horizontal and vertical field of view of 120° and 26°, respectively, with an angular resolution of 0.05° and a frame rate of 20 frames per second.

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具有等效时间采样的深度传感器

该传感器由包含105 × 1572单光子雪崩二极管阵列的上芯片和包含像素读出电路的下芯片组成。该电路的输出使用多个不同相位的时钟进行采样，这个过程称为等效时间采样，在不增加数据量的情况下提高了测量精度。采样数据用于创建直方图，可以使用片上回波分析电路从中提取深度信息，从而将最终数据大小减少高达98%。通过大幅减少输出数据，并通过处理芯片上的距离信息，可以实现每秒2500万点的采样率。激光雷达系统的水平和垂直视场分别为120°和26°，角分辨率为0.05°，帧率为20帧/秒。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature Electronics Engineering-Electrical and Electronic Engineering

CiteScore

47.50

自引率

2.30%

发文量

159

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