A High-Resolution Calibration Method for Time-to-Digital Converter of Lidar

作     者：Ruqing Liu Feng Li Jingguo Zhu Yan Jiang Chenghao Jiang Tao Hu Liu Ruqing;Li Feng;Zhu Jingguo;Jiang Yan;Jiang Chenghao;Hu Tao

作者机构：Institute of Microelectronics of the Chinese Academy of Sciences 

出 版 物：《Chinese Journal of Electronics》 (电子学报(英文))

年 卷 期：2025年第34卷第1期

页      面：222-228页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 081105[工学-导航、制导与控制] 081001[工学-通信与信息系统] 081002[工学-信号与信息处理] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

主　　题：Temperature measurement Laser radar Voltage measurement Systematics Time measurement Distance measurement Delays Calibration Field programmable gate arrays Thermal stability 

摘      要：High-resolution time-to-digital converter(TDC) finds major applications in light detection and ranging(Lidar) systems as one of the high precision time measuring techniques. In this work, a high-resolution TDC is designed and implemented on a Xilinx field-programmable gate array(FPGA) board. For precision time measurements, the proposed TDC uses an internal tapped delay chain written in Verilog. The TDC circuit measurement errors are examined and calibrated following several principles of error reduction techniques to meet the specific demand for the high-precision Lidar range. Experiments have shown that the suggested calibration TDC has higher performance, achieving sub-35 ps resolution. The design is fully customizable and implemented as a set of separate intellectual property cores. This allows for easy implementation and meets the requirements of the present-day pulse Lidar systems.