基于盖革APD阵列的单通道激光雷达信号读出电路设计  

Design of Single-Channel LIDAR Signal Readout Circuit Based on Geiger APD Array

作　　者：贾国辉 刘缠牢[1] JIA Guohui;LIU Chanlao(School of Optoelectronic Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]西安工业大学光电工程学院,西安710021

出　　处：《计算机测量与控制》2023年第5期293-299,共7页Computer Measurement &Control

摘　　要：随着测量技术的发展,激光雷达技术成为研究的热点,选取工作在盖革模式下的集成APD阵列雪崩二极管作为激光雷达的光电探测器,在探测距离为100~200 m范围内,选择上升沿为5 ns的激光脉冲,则接收带宽在70~88 MHz范围内,在此范围内APD探测器将接收到的回波信号转化为电信号,用TIA跨阻放大器反向放大模式将电流信号转化为电压信号,并将信号有效放大,输入至时刻鉴别电路,时刻鉴别电路用电压比较器来实现,最终可输出COMS逻辑电平信号;用TINA仿真软件进行仿真,仿真结果表明在接收带宽范围内TIA放大器的增益动态范围达到了54 dB,总体电路延迟约为10 ns。With the development of measurement technology,lidar technology has become a research hotspot.The integrated avalanche photodiode(APD)array avalanche diode working in Geiger mode is selected as the photodetector of LIDAR,and the laser pulse with rising edge of 5 ns is selected in the detection distance of 100~200 m,then the receiving bandwidth is in the range of 70~88 MHz,in which the APD detector converts the received echo signal into the electrical signal,and the TIA transimpedance amplifier mode is used to convert the current signal is into a voltage signal by the TIA transimpedance amplifier,and the signal is effectively amplified and input to the moment identification circuit,which is implemented with a voltage comparator,and finally the COMS logic level signal can be output.The simulation results show that the gain dynamic range of the TIA amplifier reaches 54 dB within the receiving bandwidth,and the overall circuit delay is about 10 ns.

关 键 词：激光雷达 APD 光电探测 脉冲信号 跨阻放大器 

分 类 号：TP331[自动化与计算机技术—计算机系统结构]