应用于脉冲ToF激光雷达接收器的宽带高增益跨阻放大器
Broad Bandwidth and High-gain Transimpedance Amplifier for Pulsed ToF Lidar Receiver Applications
郑浩 1杨东东 1刘延飞 1郭小男1
作者信息
摘要
设计了一款应用于脉冲飞行时间(ToF)激光雷达(LiDAR)接收器的宽带高增益跨阻放大器(Transimpedance Amplifier,TIA).该TIA由跨阻预放大器、后级电压放大器、增益补偿放大器和输出缓冲器组成.跨阻预放大器采用改进型RGC电路实现;后级电压放大器采用有源反馈电路,以提升带宽;具有有源峰值电感的增益补偿放大电路用来消除大尺寸输出缓冲器对TIA整体带宽的影响.提出的TIA电路采用0.18μm标准CMOS工艺设计.在电源电压为3.3 V条件下,TIA总消耗功率约168 mW,差模跨阻增益为106 dBΩ,-3 dB带宽约为300 MHz,输入参考噪声电流谱密度为6.8 pA/√Hz,当SNR=5时,能够检测的最小光电流约为0.7μA,动态范围为 83 dB.
Abstract
A broad bandwidth and high-gain transimpedance amplifier(TIA)is presented for pulsed time-of-flight(ToF)Lidar receiver applications.The proposed TIA primarily consists of a transimpedance preamplifier(preTIA),post-voltage amplifier,gain compensation amplifier,and output buffer.The preTIA circuit is implemented by a modified regulated-cascode(RGC).The active feedback circuit is used to increase the bandwidth in the proposed post voltage amplifier.The proposed gain compensation amplifier with active inductive peaking is utilized to mitigate the effect of the large-size output buffer on the entire TIA bandwidth.The proposed TIA circuit was designed using a 0.18 μm standard CMOS technology.The simulation results showed that the proposed TIA achieved a differential-mode transimpedance gain of 106 dBΩ,-3 dB bandwidth of-300 MHz,input-referred noise current spectral density of 6.8 pA/√Hz,minimum detectable signal of 0.7 μA at SNR is 5,dynamic range of 83 dB,and power dissipation of 168 mW with a 3.3 V power supply.
关键词
跨阻放大器/激光雷达接收器/飞行时间/雪崩光电二极管Key words
transimpedance amplifier/Lidar receiver/time of flight/APD引用本文复制引用
基金项目
国家自然科学基金资助项目(62274182)
出版年
2024
NETL
NSTL
万方数据