Search International and National Patent Collections

1. (WO2018176290) LIGHT DETECTION AND RANGING (LIDAR) SIGNAL PROCESSING CIRCUITRY

Pub. No.:    WO/2018/176290    International Application No.:    PCT/CN2017/078668
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Mar 30 01:59:59 CEST 2017
IPC: G01S 17/06
Applicants: SZ DJI TECHNOLOGY CO., LTD.
Inventors: LIU, Xiang
ZHAN, Zhipeng
PU, Wenjin
HONG, Xiaoping
Title: LIGHT DETECTION AND RANGING (LIDAR) SIGNAL PROCESSING CIRCUITRY
Abstract:
Introduced here are techniques for implementing a comparator-based LIDAR system (300) with improved components, such as an improved high-speed comparator circuit, to acquire depth information from the surroundings of an unmanned moving object (e.g., a UAV). In various embodiments, the LIDAR system (300) includes an amplifier module (330, 400) with different configurations of anti-saturation circuitry (332). The LIDAR system (300) may further include various feedback control mechanisms for noise interference reduction and timing measurement compensation including, for example, dynamic gain adjustment of the photodetector module (322), and/or dynamic adjustment of comparators' thresholds. Among other components, the disclosed comparator circuit (340) can provide the LIDAR system (300) with a wide dynamic range, preventing large signal amplification saturation while also providing sufficient magnification of small signals.