一种应用于激光雷达接收机的回波峰值检测量化电路  

A Peak Detection and Quantization Circuit of Echo Used in Lidar Receiver

作　　者：王锋奇 刘帅 谭荣清 WANG Feng-qi;LIU Shuai;TAN Rong-qing(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100194,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100049 [2]中国科学院大学,北京100049

出　　处：《光学与光电技术》2021年第4期11-17,共7页Optics & Optoelectronic Technology

基　　金：中科院STS项目(KFJ-STS-ZDTP-091)资助。

摘　　要：为实现对激光雷达回波峰值的测量,介绍了一种应用于激光雷达接收机的回波峰值检测量化电路,采用对电压回波脉冲采样保持的方法配合低速模拟数字转换器(Analog to Digital Converter,ADC)来实现回波峰值的高精度量化。电路采用SMIC 0.18μm工艺设计,仿真结果显示,该电路采样电压动态范围为800 mV,采样3 ns脉宽的脉冲保持电压误差小于3.16%,实现10 bit的量化精度。整体电路采样周期由外部使能信号和复位信号控制,可满足不同场合下激光雷达接收机回波峰值采样的应用需求。In order to realize the measurement of lidar echo peak,a peak detection and quantization circuit of echo used in lidar receiver is introduced. It uses the method of echo pulse voltage sampling and holding to keep cooperation with low speed ADC(Analog to Digital Converter)to achieve the high precision quantitation of echo peak. The circuit adopts SMIC0.18 μm process design. The simulation results show that the dynamic range of sampling voltage is 800 mV,and the error of pulse holding voltage of sampling 3 ns pulse width is less than 3.16%. The quantization precision of 10 bit is realized. The whole circuit sampling period is controlled by external enabling signal and reset signal,which can meet the application requirements of lidar receiver echo peak sampling under different occasions.

关 键 词：激光雷达 接收机 电压峰值 峰值检测保持 量化电路 

分 类 号：TN958.98[电子电信—信号与信息处理]